Classifications

• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
  • H10F77/00—Constructional details of devices covered by this subclass
  • H10F77/93—Interconnections
  • H10F77/933—Interconnections for devices having potential barriers
  • H10F77/935—Interconnections for devices having potential barriers for photovoltaic devices or modules
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
  • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
  • E04D1/29—Means for connecting or fastening adjacent roofing elements
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
  • H02S20/00—Supporting structures for PV modules
  • H02S20/20—Supporting structures directly fixed to an immovable object
  • H02S20/22—Supporting structures directly fixed to an immovable object specially adapted for buildings
  • H02S20/23—Supporting structures directly fixed to an immovable object specially adapted for buildings specially adapted for roof structures
  • H02S20/25—Roof tile elements
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
  • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
  • E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
  • E04D2001/3408—Fastenings for attaching roof-covering elements to the supporting elements characterised by the fastener type or material
  • E04D2001/3423—Nails, rivets, staples or straps piercing or perforating the roof covering material
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
  • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
  • E04D1/34—Fastenings for attaching roof-covering elements to the supporting elements
  • E04D2001/3452—Fastenings for attaching roof-covering elements to the supporting elements characterised by the location of the fastening means
  • E04D2001/3455—Fastenings for attaching roof-covering elements to the supporting elements characterised by the location of the fastening means on the internal surface of the roof covering elements
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
  • Y02B10/00—Integration of renewable energy sources in buildings
  • Y02B10/10—Photovoltaic [PV]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/50—Photovoltaic [PV] energy

Definitions

• the present invention relates to the field of coatings including roofing comprising a photovoltaic component for the transformation of solar energy into electrical energy.
• 4,040,867 proposes solar tiles that have an overlap zone and a connection system allowing direct electrical contact without tile-tile cables.
• the connection is provided by an outer element to the tiles, U-shaped and conductive, which overlaps the two tiles at the connection points.
• This U-shaped element is then blocked by a protective strip in order to maintain contact between the successive tiles and to preserve it from external aggressions.
• the installation of this contact element and its protection is specific and tedious.
• connection without cable is ensured by contacting the upper part of the photovoltaic film not covered by the protective layer of a tile with the lower part of the photovoltaic film protected by the layer of translucent material but free as protruding from the base layer of support material of a next tile.
• Current bars allow the contact of several rows of tiles from the protruding areas, left free at the end of each row.
• Such an element may in particular be made in the usual forms of the covering elements, for example, in the form of curved or flat tile, in particular called “tiles” according to the English term, slates, in particular called “slates” according to the English term, shingles especially called “shakes” or “shingles” according to the English term or panels including “panels” according to the English term.
• These elements may be of natural or synthetic or metallic material or a combination of these different shapes or types of material.
• cover elements according to the invention can be placed on battens and / or on a lattice and / or on a usual roof panel forming a continuous support, in particular called "roof deck” or “roof sheets” according to English terms, of the usual way, that is to say according to the rules of work currently used in the trade.
• they may cover the entire roof surface or only a portion of it.
• they do not differ significantly in their shape and architecture of the current types of coverage.
• they do not require third elements under the cover layer, in particular no special supports or cables.
• the invention is also applicable to the renovation of existing buildings as for the construction of new buildings. Buildings are residential, commercial or other uses. More particularly, some elements may be subsequently removed from the roof covering according to the invention and replaced, individually or in large numbers, for example in the case of repairs or replacement.
• Another object of the present invention is to ensure the sealing of a roof comprising a coating formed with elements according to the invention, as well as with normal tiles.
• the roof covering with a photovoltaic function according to the invention is simple, inexpensive and allows a reliable and long-lasting connection between the solar modules (called elements or photovoltaic elements in the following description) the component, while guaranteeing a satisfactory aesthetic.
• the covering properties of the coatings according to the invention are not degraded with respect to a conventional roof covering which does not have a photovoltaic function because the addition of this does not require the piercing of the exposed surface of the coating element.
• the present invention relates to a photovoltaic roof covering comprising an assembly of a plurality of elements in the form of tiles, shingles or panels, electrically connected to each other, a portion or portion of said elements being covered by neighboring elements in the assembly and another portion or portion being exposed externally, said elements comprising: a support material comprising an inner face and an outer face; a photovoltaic layer disposed at least on the portion of the outer face portion of the substrate material; support exposed externally in the assembly, optionally an electrical insulating layer consisting for example of a preferably polymeric film covering said support material on its outer face and / or inner, optionally a translucent or transparent layer of protection covering at least said photovoltaic layer, - electrical conduction means positioned on either side of said photovoltaic layer, configured to allow recovery of the electric current generated by said layer when exposed to light, said means comprising in particular a first connector connected to an electrical pole of the photolayer ovoltaic and a second connector connected to another electrical pole of the photovoltaic layer
• the present coating is further characterized in that at least one of the connectors present on at least one of said elements comprises, is constituted by or is integrated with a tongue or a folding mobile band and in that said tongue or strip is maintained in the assembly in electrical contact with a connector of the preceding element of said assembly and in a folded position between the two successive elements.
• Said elements may be connected in series and / or in parallel, each end of said assembly being electrically connected by current bars to a current converter typically used for powering a domestic electrical installation.
• the electrical and mechanical connection between two connectors of two successive elements is carried out by fixing means chosen from optionally thermally activated conductive adhesives, cold or hot welds, metal felts and, more generally, any fastening system which is sensitive to the pressure, the usual mechanical fastening means such as nails, staples, screws or rivets.
• the portion of the elements exposed to the outside in the assembly has a curved shape to the outside.
• the electrical and mechanical connection between two successive elements is achieved by a device of the push-button type, the male or female part of the device forming part of a first connector of a first element and the female or male part of the device forming part of the tongue or the folding mobile band of a second element.
• the male and female parts may be coated with one or more films or electrical insulating caps and forming a moisture barrier.
• the support material of the constituent elements may be rigid of the terracotta type and the tongue or the strip consists of or comprises an identical or different rigid material, the connection and the mobility of the tongue being ensured by means crimping device such as a hinge and / or a set of one or more films for example constituted by the electrical insulating layer covering at least partly said support material and / or the translucent protective layer covering at least said photovoltaic layer.
• the support material of the elements may also be made of a flexible or semi-rigid material, the deformation of which allows the flanged positioning of said tongue or of said strip.
• each element comprises a first fixed connector and a second connector in the form of a tongue or a folding mobile band, said first and second connector being positioned on each element so that within assembly:
• said tongue or folding mobile band is in electrical contact with the fixed connector of the preceding element in the assembly, said tongue or strip being held in a folded position between these two successive elements,
• said first connector is in electrical contact with the tongue or the strip of the next element of the assembly, the latter being held in a folded position between these two successive elements.
• the fixed connector is disposed on the part of said elements covered in the assembly.
• the fixed connector is a tongue or a non-removable strip disposed on one side of the element.
• a first type of element comprises fixed connectors and a second type of element comprises connectors in the form of a tongue or a folding mobile band, said elements being arranged in the assembly. such that the fixed connectors of the elements of the first type are in electrical contact with the tongues or bands of an element of the second type, said tongues or strips being held in a folded position between two successive elements.
• the first type of element comprises two fixed connectors positioned on the part of said elements covered in the assembly and in which the second type of element comprises two tongues positioned in the extension of the part of said elements exposed to the outside in the assembly, wherein a first horizontal row of the assembly is formed by the juxtaposition of elements of the first type and a second horizontal upper row of the assembly is constituted by the juxtaposition of elements of the second type, the two rows being staggered and offset by half a width of the element.
• the present invention further relates to a photovoltaic roof element as previously described, the assembly of which allows the realization of the roof covering.
• the roof element is in the form of tiles, shingles or panels as described above, and is characterized in that it comprises at least one connector comprising, constituted by or integrated with a tongue or a removable strip. This tongue or strip is positioned according to the invention so as to allow the connection to another element, identical or different, the assembly.
• FIG. 1 illustrates a first embodiment of an element of a coating according to the invention.
• Figure 2 schematizes a sectional view along the axis AA 'of the element of the figure and illustrates the assembly of the elements of the first mode in the coating.
• Figure 2bis illustrates the method of assembly used for the attachment and the connection of two successive elements of the assembly.
• Figure 3 shows a particular embodiment of the electrical connection between two elements of the coating.
• FIG. 4 illustrates a roof provided with elements according to a second embodiment of the invention.
• FIG. 5 illustrates the detail of the structure and the arrangement of the elements composing the roof of FIG. 4.
• Figures 6 and 7 respectively illustrate other embodiments of an element of a coating according to the invention and their assembly.
• FIG. 1 represents a perspective view of an element that may be suitable for producing a roof covering according to the invention.
• the element is for example a tile 1.
• This tile 1 has for aesthetic reasons a slight detachment or bending 2 on its upper face, in the portion intended to be exposed outwardly within the tile assembly.
• a non-curved tile could, however, quite suit the implementation of the present invention. It should however that its shape does not interfere with the rotation of the tile relative to the movable tongue 9.
• Its thickness is preferably sufficient to provide the space required for the electrical connection, for example the housing of the snap fastener according to the embodiment illustrated in Figure 3, if any.
• a semi-rigid base tile suitable for implementing the present invention may be manufactured according to a method of molding and cutting as described in US 2006/0029775.
• the other part 3 of the tile which represents for example in the figure about half of the total surface of the tile, is flat and intended to be covered by the curved portions 2 of neighboring tiles after the laying of the coating, according to well known techniques.
• the tile 1 also conventionally comprises zones 5 for fixing the tiles, for example by means of nails or crampons, on the battens and / or on a lattice and / or on a usual roof panel forming a continuous support, also called "roof deck” or "roof sheets” according to American terms.
• the tile according to the invention thus has a classic shape, quite similar to the tiles conventionally used in the field of roof coverings.
• the photovoltaic module 4 collects and converts light energy, in particular the solar rays illuminating the roof into electrical energy typically used to power a household electrical installation equipping the house.
• These means are for example strips or collector strips 6, 7 formed of thin electrical conductors, preferably metal. These ribbons extend beyond the curved zone 2 and are in contact electrical connector with electrical connectors 8 and 9 in particular to establish an electrical connection with the previous and next tiles in the assembly, the type in series and / or in parallel and ultimately with the electrical installation to power.
• each end of the assembly of tiles connected in series and / or in parallel is for example connected by current bars, called "electrical conductive busses" according to the English term, to a current converter serving typically to the power supply of a domestic electrical installation.
• the number of tiles forming an assembly and their mode of connection in parallel or in series are generally provided according to the intensity of the current and the potential difference most suitable for the operation of the installation.
• An operating diagram of such an assembly is for example described in the application US Pat. No. 5,590,495, FIG. 10 and the associated text, to which, for example, reference may be made for further details.
• the collecting tape 7 is connected to a first fixed connector 8 of known technology which is positioned on the part 3 of the tile 1.
• Part 3 is for example located at the top of the tile relative to the zone 2.
• the collector tape 6 is connected to a second connector in the form of a folding tongue 9, positioned in the lower part of the tile 1, in the extension of the curved zone 2.
• FIG. 2 shows a sectional view along the axis AA 'of the tile of Figure 1, showing schematically its various components.
• the figure also shows a schematic view of the connection of the tile 1 to the next tile in the assembly.
• the tile 1 comprises a first layer of a support material 11 which may be rigid, semi-rigid or flexible.
• a support material 11 which may be rigid, semi-rigid or flexible.
• all the basic materials currently used for covering roofs can be used, among which mention may be made of materials of inorganic nature such as cement, terra-cotta, metals.
• asphalt derivatives or other materials of organic nature based on polymeric or copolymeric compounds or mixtures of thermoplastic polymers and thermosetting polymers such as aliphatic polymers, polyurethanes, polyacrylates and polyvinyls, optionally loaded with inorganic compounds, in the form of dense materials or in foam or microcellular form. More specifically, mention may be made as a possible polymer material material or mixture of material of the following list: polyvinyl chloride (PVC); polyethylene
• PE polypropylene
• PB polybutene
• PET polyethyleneterephthalate
• PBT polybutyleneterephthalate
• Péthylènenaphthalate ethylene-propylene-diene monomer copolymer and the copolymers and / or binary mixtures of these compounds.
• Possible materials include the following polymers, copolymers and blends: ABS (acrylonitrile butadiene styrene copolymer), ABS / PVC, ABS / PBT, ASA (acrylonitrile styrene acrylate), ASA / AES (ASA blend and acrylonitrile ethylene-propylene-styrene) ), ASA / PVC, Acrylic / PVC, TPO (thermoplastic based on olefins), PC (polycarbonate), PPO (polyphenylene oxide) PC / PPO, Nylon / PP, PP / PE, PP / PS (PP blend and polystyrene), CPVC (chlorinated polyvinyl chloride), and PVC / PU (mixture of PVC and polyurethane), said materials optionally comprising inorganic fillers or compounds flame retardants, aliphatic polyurethanes and thermoplastic elastomers.
• ABS acrylonitrile
• the base material is preferably covered by an interlayer film 12 typically forming a moisture barrier layer and electrical insulation.
• interlayer film 12 is for example useful if the support has a certain electrical conductivity and / or if it is porous.
• the tile 1 is also provided according to the invention with a photovoltaic module in the form of a layer 4.
• the photovoltaic layer is covered by a film 10 comprising a glass sheet and / or preferably transparent polymer, for example a flexible film moisture barrier and electrical insulator such as described in US 5986203, US 5741370 or US 5990414 or US 2005/0178429.
• the interlayer film 12, as well as the film 10, can be adhesive.
• the film 12 may be adhesive on its upper surface to adhere to the film 10 on the peripheral zone surrounding the layer 4 and to the collector 7 in electrical contact with the lower zone of the layer 4.
• the film 10 may likewise be adhesive on the underside.
• the tile can be either equipped with a single photovoltaic module but it can also include several, these being connected together for example via preferably flat and metallic conductors on the curved face 2.
• Main collectors 6 and 7 formed of electrically conductive materials preferably in the form of metal ribbons as previously indicated the electrical connection of the module respectively to the connectors 9 and 8 present on the tile 1.
• the connectors 9 and 8 and the main collectors 6 and 7 according to the invention may be according to any technology known in the field.
• the collector 7 ', in electrical contact with the main collector 7, may for example be in the form of a film or metal strip of the same surface as the layer 4 and in electrical contact with the lower face of it.
• the collectors may for example be in the form of conductive wires 6 '', for example metallic, arranged parallel to the upper face of the layer 4 and in electrical contact with, for example, a collector strip 6 'in electrical contact with the main collector 6.
• the electrical and mechanical connection between two connectors of two successive elements of the present photovoltaic assembly can be achieved by any means of known fixation.
• such means may be chosen from conductive adhesives that may be thermally activated, cold or hot welds, or even metal felts commonly called “steel wool-like pad", and more generally according to any known system. pressure sensitive fastener.
• conventional mechanical fastening means such as nails, staples, screws or rivets may also be used according to the invention.
• FIG. 2 is also shown schematically the arrangement of two successive neighboring tiles according to the invention. It can be seen in FIG. 2 that within the assembly constituting the coating, the tongue 9 of the element 1a is disposed in contact with the fixed connector 8 of the tile 1. In addition, the tongue 9 is held in a folded position because sandwiched between the curved portion 2 of the element 1 'and the part 3 of the element 1.
• This configuration according to the invention has the decisive advantage over the devices described in the prior art to guarantee a very good sealing of the electrical connection established between the two tiles over time, said connection being protected not only by the curved portion 2 of the tile but also, because of its position held folded between the two tiles, by the layers of successive materials constituting the tongue 9.
• FIG. 2a shows the simplicity of laying the tiles described with reference to FIG. 2.
• a first tile 1, provided with a connector 8 is fastened to the frame or the lath (Not shown), in particular thanks to a fixing system at the level of the zones 5 (not shown in FIG. 2).
• the second tile is approaching the previous one, the tongue 9 being still in a substantially open position.
• the second tile is placed in contact with the first 1, the connectors 8 and 9 being presented to one another.
• the right connection Electrical is then verified by the installer, the tongue 9 being held in the open position and the tile is not yet completely folded, and the fixing between the two connectors is performed.
• step d) the second tile is put in its final position above the first 1 and the tongue 9 is thus folded and sandwiched between the two tiles 1, the, optimal effective electrical contact between the two connectors 8, 9 being thus ensured.
• the installer can then permanently fix the second tile to the frame.
• the installer can also project polyurethane foam for example before folding the tile as described in step d).
• FIG. 3 more precisely describes a system for electrically contacting two connectors that are alternative to those already known, such as those described for example in US Pat. No. 5,590,495, although these can also be used in the context of the present invention.
• the connection between two successive elements of the assembly is obtained by means of a device of the push-button type.
• This device is composed of two parts, one comprising a male portion 31 of the snap button, the other comprising a female part 32 of the snap button.
• the male part 31 of the device forms part of a first fixed connector of the first element 1 and the female part 32 of the device forms part of the folding tongue of the second element 1 '.
• the female part 32 may advantageously furthermore comprise a pressure ring 33, similarly to the snap fasteners conventionally used for example in the field of clothing.
• the female part is made in whole or in part of metal elements, so as to ensure the electrical connection between the electrical conductor tape 6 and the pressure ring 33. Said connection may possibly be secured by means of a weld.
• the male part is designed identically but is connected to the electrical conductor tape 7. According to a possible mode to ensure a perfect seal over time, the female part 32 may be covered on its upper face by a film or a plastic cap 34 and on its underside by a film 36, which are electrical insulators and barriers to moisture.
• the film 34 extends around the edge of the tongue of the tile and that it has adhesive properties so as to cover a portion of the tile 1 and thus provide an even greater seal over time .
• the male part 31 may be isolated and protected on the upper face by a film or cap 35 of the same kind.
• a spray deposition of hydrophobic product or a resin or for example polyurethane foam on the top of the female part may provide additional sealing.
• Figures 4 and 5 show a type of assembly with an alternative embodiment of a coating according to the invention.
• the coating is obtained by the staggered arrangement of tiles according to the invention in a horizontal direction.
• two types of tiles are required, the first type of tiles 41 for the cover of the lower row L and a second type of tiles 42 for the cover of the upper row U, as shown in FIG.
• the two types of elements are arranged in such a way that a fixed connector of an element of the first type is in electrical contact with a tongue of an element of the second type.
• a connection is illustrated in Figure 5c. Similar to the previous modes, we see in FIG. 5c that once positioned in the assembly, the tongue 9 is held in a folded position and is sandwiched between the curved portion 2 of the element 42 and the portion plane 3 of the element 41, thus ensuring a perfect seal over time of the electrical connection established between the two tiles, by means of the connectors 8, and 9 '.
• the assembly and the connection of the tiles 41 and 42 are obtained using the pressure-button type device described above in relation with FIG. 3.
• the tiles 41 of the row L have two zones. connected with fixed connectors 8 and 8 '.
• the connectors 8 and 8 'each comprise a male connection part as previously described.
• the collector disposed above the photovoltaic layer 4 of the tiles 41 is in electrical contact with the first plug 8 of said tiles 41.
• the collector tape disposed beneath the photovoltaic layer 4 of the tiles 41 is in electrical contact with the second plug 8 'of said tiles 41.
• the tiles 42 of the row U have two connection zones equipped with connectors in the form of folding tabs 9 and 9 '.
• the collector disposed above the photovoltaic layer 4 of the tiles 42 is in electrical contact with the first socket 9 of said tiles 42.
• the collector disposed below the photovoltaic layer 4 of the tiles 42 is in electrical contact with the second plug 9 said tiles 42.
• This plug will connect to an electrical cable connected via a converter or inverter to the electrical network of the installation.
• This electric cable can run in a cable gland for example placed under the overhang of the roof, on each pinion.
• This cable gland may contain the cables of several "photovoltaic lines”. The roofer can thus lay a horizontal row of tiles 41 and tiles 42 by connecting them one by one, as shown in FIG. 4.
• FIG. 6 shows a tile according to another embodiment of the invention, comprising a foldable tongue 9 positioned on the side of the tile 61 at the level of the low zone 2 comprising the photovoltaic layer 4.
• This tongue bears, for example, a part female as described above for the electrical connection between two adjacent tiles 61 and 61 '.
• a tab 60 On the other side of the tile, at the same level, is positioned a tab 60 preferably fixed comprising a maie connection part.
• the assembly and the connection between two successive tiles are illustrated in Figure 6 and are practiced for example according to the method described in relation to Figure 2a.
• this embodiment has the advantage of allowing the realization of a serial connection on a single row or a single rank portion. Such a configuration makes it possible, in particular, compared to the method illustrated in FIG. 5, for the same length of roofing, to reduce the potential differences inherent in a series connection.
• FIG. 7 corresponds to another embodiment similar to that described with reference to FIG. which the fixing point is this time located under the overlap zone, near the photovoltaic layer 4.
• the present invention is not limited to the embodiments described above.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Roof Covering Using Slabs Or Stiff Sheets (AREA)
• Photovoltaic Devices (AREA)

Applications Claiming Priority (3)

Publications (1)

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• 2007
  • 2007-04-06 FR FR0754384A patent/FR2914785B1/fr not_active Expired - Fee Related
• 2008
  • 2008-04-04 WO PCT/FR2008/050608 patent/WO2008139102A2/fr not_active Ceased
  • 2008-04-04 US US12/594,925 patent/US8671630B2/en active Active
  • 2008-04-04 EP EP08788131A patent/EP2145352A2/de not_active Withdrawn
  • 2008-04-04 CA CA002683308A patent/CA2683308A1/en not_active Abandoned

Non-Patent Citations (1)

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