EP1101873A2 - Filterrohr zum Einbringen in ein Bodenbohrloch sowie Verfahren zur Herstellung des Filterrohrs - Google Patents
Filterrohr zum Einbringen in ein Bodenbohrloch sowie Verfahren zur Herstellung des Filterrohrs Download PDFInfo
- Publication number
- EP1101873A2 EP1101873A2 EP00124128A EP00124128A EP1101873A2 EP 1101873 A2 EP1101873 A2 EP 1101873A2 EP 00124128 A EP00124128 A EP 00124128A EP 00124128 A EP00124128 A EP 00124128A EP 1101873 A2 EP1101873 A2 EP 1101873A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- plastic material
- filter
- tube
- filter tube
- filter layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/082—Screens comprising porous materials, e.g. prepacked screens
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
- E03B3/08—Obtaining and confining water by means of wells
- E03B3/16—Component parts of wells
- E03B3/18—Well filters
- E03B3/20—Well filters of elements of special shape
Definitions
- the invention relates to a filter tube for insertion into a bottom borehole for filtering a liquid stored in the soil.
- Such filter tubes are used wherever there is a stored in the ground Liquid is to be removed by pumping. As examples are Water wells to name that are in very sandy areas or in desert areas be drilled. Via filter pipes inserted in the ground borehole the water stored in a layer of sand can be pumped out. Another one The area of application is the removal of leachate in the area below landfills and the same. There is stored or seeping in the ground Water absorbed and pumped out through the filter tubes.
- Known filter tubes consist of a support tube, which either itself with appropriate, the actual filtering slits or openings is provided, or which is covered with a filter layer, on the support tube Openings are provided that prevent the filter layer from penetrating Allow water into the pipe interior.
- the invention is therefore based on the problem of specifying a filter tube which can be produced in a simple and inexpensive manner and has good filter properties owns.
- a filter tube to be placed in a ground borehole provided for filtering a liquid stored in the soil, comprising a carrier tube with liquid passage openings and one on the outside arranged porous filter layer made of a sintered plastic material.
- the filter tube according to the invention has a porous filter layer which consists of a Plastic material exists, which is sintered on in a simple sintering process has been.
- the plastic material is over Heated melting temperature so that there is a melting or sintered composite, which leads to a firmly adhering and stable filter layer that is still porous is.
- Plastic material in granular or powder form is preferably used.
- the pore size easily by choosing the size of the granular or powdered plastic material possible, on the other hand by the duration of the Temperature treatment and the heating temperature itself, as a result of which Networking or the degree of bonding can be varied. This allows you to easily Way filter tubes of different porosity are manufactured, each for different uses or locations and soil conditions are suitable. Another advantage is that there is no additional to produce the filter layer Aids such as resins, adhesives or the like are required.
- the plastic material should be preferred be a high or ultra high molecular material.
- Polyethylene is preferred here (with high molar mass (approx. 200,000 - 5 million g / mol), short name: HD-HMW-PE, or ultra high molecular weight (3 million - 6 million g / mol), short name: UHMW-HD-PE) or polypropylene.
- high molar mass approximately 200,000 - 5 million g / mol
- HD-HMW-PE high molecular weight
- UHMW-HD-PE ultra high molecular weight
- the average grain size of the granules or powder should be in the range between 1 ⁇ m and 5 mm.
- the average pore diameter is preferably in the range between 0.5 ⁇ m and 4 mm, in particular between 1 ⁇ m and 3 mm.
- the temperature treatment should preferably be carried out such that the pore diameter smaller on the outside of the filter layer than on that on the carrier tube adjacent inside is. According to this embodiment of the invention given a larger pore diameter inside the filter layer, the one allows faster passage of the water through the filter layer to the support tube.
- the thickness of the filter layer itself should be between 5 mm and 20 mm. It should be ensured that they preferred at least double corresponds to at least three times the granule or powder diameter.
- the filter tube placed in the borehole - usually a variety of individual filter tubes connected in series, these can either be put together or screwed together - is due to the radially opposing surrounding soil material under high pressure.
- This bias serves to stabilize the filter tube and to withstand the considerable external pressure.
- several pipes connected in series are connected in series.
- the individual filter tubes which preferably has a length between 0.5 m and 4 m, in particular of 2 m have, either after completion at the ends of external or internal thread sections attached in a welding process, or already on the support tube educated.
- the carrier tube itself can be made from Plastic, especially PVC or PE or a metal, especially stainless steel consist.
- the invention also relates to a method of manufacture a filter tube, which is characterized in that the carrier tube surrounding loose bed of sinterable granular or powdered Plastic material to form a filter layer sintered onto the carrier tube melted in a heating device by supplying temperature and cools down after reaching a porous fusion or sintered composite.
- the carrier tube is preferably standing vertically in the heater, which is cylindrical is formed, set between the support tube and the heating walls of the Heating device remaining annulus is made with the granular or powdered Plastic material filled.
- the plastic material is here based on the inner support tube is heated from the outside. The temperature is supplied until the desired degree of crosslinking or bonding with the desired Porosity.
- a plastic material high or ultra high molecular plastic material are used, preferred Polyethylene or polypropylene with an average grain size of 1 ⁇ m to 5 mm.
- the heating should continue until the melting or Sintered composite has an average pore diameter in the range between 0.5pm and 4 mm, in particular between 1 ⁇ m and 3 mm.
- the sintering temperature is in the range between 150 ° C and 220 ° C, depending on the material used and what degree of bonding or sintering or what porosity can be achieved should.
- the duration of the temperature treatment also plays a role here, which is preferred in the range between 15 minutes to 120 minutes, especially 30 minutes up to 75 minutes, also depending on the material used or the desired degree of porosity to be set.
- the length of the heat treatment must of course be so long that a complete warming and Melting of the surfaces of the granules of the plastic granulate or powder down to the plastic grains on the carrier tube.
- Fig. 1 shows in the form of a schematic diagram the use of an inventive Filter tube 1.
- the filter tube according to the invention or several, connected in series pipes of this type are used in a borehole 2.
- Hole 2 was placed in a desert floor in the example shown. This exists from an upper layer 3 of sand, an essentially waterproof Layer 4 of clay, layer 5 of sand, in which water is stored, and a lower layer 6 of clay.
- the filter tube 1 in the Layer 5 stored water can be filtered and subtracted. That or the filter tubes are only arranged in the lower region of borehole 2, that is in Area of the water-bearing layer.
- the filter tube 1 consists of a carrier tube 10, on which a filter layer 11 is sintered. That the gravel layer penetrating water reaches the filter layer 11. There the water is let through, carried soil or sand is retained. The water enters the carrier tube 10 through corresponding openings 12 and is pumped out by means of a pump 13, see arrow A. Due to the Filter property of the filter layer 11, the pumped water is very pure and not loaded with sand.
- the filter layer 11 consists of sintered plastic material, preferably high molecular or ultra high molecular weight polyethylene. This is in the form of individual plastic granules 14. These granules 14 were melted on the outside by thermal treatment and were able to to connect. In this way the granules were sintered together, so that a solid filter layer forms. Because the plastic material is not completely melts, but only on the outside, it is guaranteed that the Filter layer 11 is sufficiently porous.
- the grain size of the plastic granules used can be in the range between 1 ⁇ m and 5 mm.
- the porosity can be adjusted to the selected size of the granules.
- the sintering temperature is between 150 ° C and 220 ° C, the duration preferably in the range between 30 minutes to 75 minutes. The more fine-grained the material is, the shorter the sintering time, because the complete soak and melting on the edge due to the better heat transfer done faster.
- the specific heating temperature time depends on the material, the radial thickness of the filter layer as well as the granulate size and the desired Pore diameter selected.
- the pores 15 can be seen in the edge region of the Filter layer 11 slightly smaller than in the inner area, which results from that the outer layer is exposed to the high temperature for a little longer. Can too For this purpose, a targeted, brief temperature increase at the end of the heating period done in pipe manufacturing. The grains on the edge melt a little stronger and connect more extensively. The water that passes through it through openings 12 into the interior of the carrier tube 10.
- FIG. 3 shows another possible application of the invention Filter tube 1.
- Several filter tubes are here in an essentially horizontally guided Borehole used. The borehole runs below one, for example Landfill. Any leachate from the landfill can be removed via the filter pipes are recorded and pumped out by means of the pumps 16.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Dispersion Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Filtering Materials (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
- Fig. 1
- eine Prinzipskizze des Einsatzes eines erfindungsgemäßen Filterrohrs in einem Bohrloch,
- Fig. 2
- eine Ansicht eines erfindungsgemäßen Filterrohrs im Schnitt, und
- Fig. 3
- eine weitere Einsatzmöglichkeit des erfindungsgemäßen Filterrohrs.
Claims (20)
- Filterrohr zum Einbringen in ein Bodenbohrloch zum Filtern einer im Boden gespeicherten Flüssigkeit, umfassend ein Trägerrohr (10) mit Flüssigkeitsdurchtrittsöffnungen (12) und einer außenseitig angeordneten porösen Filterschicht (11) aus einem aufgesinterten Kunststoffmaterial, deren Porendurchmesser an der Außenseite der Filterschicht (11) kleiner als an der an das Trägerrohr (10) angrenzenden Innenseite ist.
- Filterrohr nach Anspruch 1, dadurch gekennzeichnet, dass das Kunststoffmaterial ein hoch- oder ultrahochmolekulares Kunststoffmaterial ist.
- Filterrohr nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Kunststoffmaterial Polyethylen oder Polypropylen ist.
- Filterrohr nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das die Filterschicht (11) aus einem Kunststoffgranulat (14) oder -pulver gebildet ist.
- Filterrohr nach Anspruch 4, dadurch gekennzeichnet, dass die mittlere Korngröße des Granulats (14) oder Pulvers im Bereich zwischen 1µm und 5mm liegt.
- Filterrohr nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der mittlere Porendurchmesser zwischen 0,5µm und 4mm, insbesondere zwischen 1µm und 3mm liegt.
- Filterrohr nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Dicke der Filterschicht (11) zwischen 5mm und 20mm liegt.
- Filterrohr nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Trägerrohr (10) aufgrund des Schrumpfverhaltens der Filterschicht (11) beim Abkühlen unter einer Vorspannung steht.
- Filterrohr nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass es eine Länge zwischen 0,5m und 4m, insbesondere von 2m aufweist.
- Filterrohr nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Trägerrohr (10) aus Kunststoff, insbesondere PVC oder PE oder einem Metall, insbesondere Edelstahl besteht.
- Verfahren zur Herstellung eines Filterrohrs nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass eine das Trägerrohr umgebende lose Schüttung eines sinterbaren granulat- oder pulverförmigen Kunststoffmaterials zur Bildung einer auf das Trägerrohr aufgesinterten Filterschicht in einer Heizvorrichtung durch Temperaturzufuhr angeschmolzen wird und nach Erreichen eines porösen Schmelz- oder Sinterverbunds abkühlt, wobei am Ende der Temperaturbehandlung eine kurzzeitige Temperaturerhöhung zur gezielten Erwärmung der äußeren Oberflächenschicht des Kunststoffmaterials erfolgt.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, dass das Kunststoffmaterial bezogen auf das innenliegende Trägerrohr von außen erwärmt wird.
- Verfahren nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass als Kunststoffmaterial ein hoch- oder ultrahochmolekulares Kunststoffmaterial verwendet wird.
- Verfahren nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass als Kunststoffmaterial Polyethylen oder Polypropylen verwendet wird.
- Verfahren nach einem der Ansprüche 11 bis 14, dadurch gekennzeichnet, dass ein Kunststoffmaterial mit einer mittleren Korngröße von 1µm und 5mm verwendet wird.
- Verfahren nach einem der Ansprüche 11 bis 15, dadurch gekennzeichnet, dass das Kunststoffmaterial solange erwärmt wird, bis der sich einstellende Schmelz- oder Sinterverbund einen mittleren Porendurchmesser im Bereich zwischen zwischen 0,5µm und 4mm, insbesondere zwischen 1µm und 3mm aufweist.
- Verfahren nach einem der Ansprüche 11 bis 16, dadurch gekennzeichnet, dass die Sintertemperatur im Bereich zwischen 150°C und 220°C liegt.
- Verfahren nach einem der Ansprüche 11 bis 17, dadurch gekennzeichnet, dass die Dauer der Temperaturbehandlung 15 min bis 120 min, insbesondere 30 min bis 75 min beträgt.
- Verfahren nach einem der Ansprüche 11 bis 18, dadurch gekennzeichnet, dass während der Temperaturbehandlung das oder beide freien, nicht mit Kunststoffmaterial umgebenen Enden des Trägerrohrs gekühlt werden.
- Verfahren nach einem der Ansprüche 11 bis 19, dadurch gekennzeichnet, dass vor oder nach Beendigung der Temperaturbehandlung das Trägerrohr innenseitig gekühlt wird.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19955973 | 1999-11-19 | ||
| DE1999155973 DE19955973C1 (de) | 1999-11-19 | 1999-11-19 | Filterrohr zum Einbringen in ein Bodenbohrloch sowie Verfahren zur Herstellung des Filterrohrs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1101873A2 true EP1101873A2 (de) | 2001-05-23 |
| EP1101873A3 EP1101873A3 (de) | 2003-04-23 |
Family
ID=7929804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00124128A Withdrawn EP1101873A3 (de) | 1999-11-19 | 2000-11-07 | Filterrohr zum Einbringen in ein Bodenbohrloch sowie Verfahren zur Herstellung des Filterrohrs |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1101873A3 (de) |
| DE (1) | DE19955973C1 (de) |
| DZ (1) | DZ3098A1 (de) |
| GC (1) | GC0000350A (de) |
| MA (1) | MA25939A1 (de) |
| TN (1) | TNSN00217A1 (de) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003091169A1 (de) * | 2002-04-23 | 2003-11-06 | Pfleiderer Infrastrukturtechnik Gmbh & Co. Kg | Belüfter |
| WO2003103800A3 (en) * | 2002-06-05 | 2004-05-27 | Pall Corp | Filter cartridge and process for the production thereof |
| WO2008067990A1 (en) * | 2006-12-04 | 2008-06-12 | Pall Corporation | Filtering device, especially for use as a well screen filter |
| EP2031138A1 (de) * | 2007-09-03 | 2009-03-04 | Ochs Bohrgesellschaft mbH | Verwendung von Glaskugeln zur Füllung des Ringraumes zwischen Filterrohr und Bohrlochwand bei Bohrungen zur Wassergewinnung |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899967B (zh) * | 2010-08-11 | 2013-05-15 | 中国水利水电科学研究院 | 在弱含水层中增加出水量的成井工艺 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE910288C (de) * | 1936-08-27 | 1954-04-29 | Pfaelzische Chamotte Und Tonwe | Verfahren zur Herstellung poroeser Formkoerper fuer Filterzwecke und fuer Diaphragmen |
| DE813992C (de) * | 1949-03-17 | 1951-09-17 | Wilhelm Dipl-Ing Degen | Filtrierkoerper, insbesondere Kiespackungskoerper fuer Brunnenfilter u. dgl. |
| DE1759926A1 (de) * | 1968-06-21 | 1971-07-15 | Kunststoffrohr Und Filterentwi | Brunnenrohr bzw.Rohrschale |
| DE2231859C3 (de) * | 1972-06-29 | 1978-10-12 | Hannover-Braunschweigische Stromversorgungs-Ag, 3000 Hannover | Filter für Rohrbrunnen |
| DE3024324A1 (de) * | 1980-06-27 | 1982-01-21 | Herding GmbH Entstaubungsanlagen, 8450 Amberg | Filterkoerper zum abscheiden von fest- und/oder schwebstoffen und verfahren zu dessen herstellung |
| JPS60238115A (ja) * | 1984-05-11 | 1985-11-27 | Noda Seisakusho:Kk | 流体ろ過の固形ろ過体 |
-
1999
- 1999-11-19 DE DE1999155973 patent/DE19955973C1/de not_active Expired - Fee Related
-
2000
- 2000-11-07 EP EP00124128A patent/EP1101873A3/de not_active Withdrawn
- 2000-11-15 TN TNTNSN00217A patent/TNSN00217A1/fr unknown
- 2000-11-18 DZ DZ000150A patent/DZ3098A1/xx active
- 2000-11-19 GC GCP20001030 patent/GC0000350A/en active
- 2000-11-20 MA MA26108A patent/MA25939A1/fr unknown
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003091169A1 (de) * | 2002-04-23 | 2003-11-06 | Pfleiderer Infrastrukturtechnik Gmbh & Co. Kg | Belüfter |
| US7195233B2 (en) | 2002-04-23 | 2007-03-27 | Pfleiderer Water Systems Gmbh | Aerator |
| WO2003103800A3 (en) * | 2002-06-05 | 2004-05-27 | Pall Corp | Filter cartridge and process for the production thereof |
| WO2008067990A1 (en) * | 2006-12-04 | 2008-06-12 | Pall Corporation | Filtering device, especially for use as a well screen filter |
| US8082986B2 (en) | 2006-12-04 | 2011-12-27 | Pall Corporation | Filtering device, especially for use as a well screen filter |
| EP2031138A1 (de) * | 2007-09-03 | 2009-03-04 | Ochs Bohrgesellschaft mbH | Verwendung von Glaskugeln zur Füllung des Ringraumes zwischen Filterrohr und Bohrlochwand bei Bohrungen zur Wassergewinnung |
Also Published As
| Publication number | Publication date |
|---|---|
| GC0000350A (en) | 2007-03-31 |
| MA25939A1 (fr) | 2003-12-31 |
| EP1101873A3 (de) | 2003-04-23 |
| DE19955973C1 (de) | 2002-02-28 |
| TNSN00217A1 (fr) | 2002-05-30 |
| DZ3098A1 (fr) | 2004-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1251985B8 (de) | Verfahren zur herstellung von leichtbauteilen | |
| DE2651023C2 (de) | Verfahren zum Herstellen eines Ortbetonpfahles mit einer Fußerweiterung und Vorrichtung zum Durchführen des Verfahrens | |
| EP2058441B1 (de) | Wasserspeicherndes und wasserreinigendes System | |
| EP3096723B1 (de) | Wärmeeinrichtung mit einem latentwärmespeichermittel | |
| DE3444387A1 (de) | Filterelement | |
| EP0634952A1 (de) | Filterelement mit einem formstabilen, durchlässig-porösen kunststoff-formkörper. | |
| WO2009039967A1 (de) | Spaltrohr eines antriebsmotors für ein pumpenaggregat | |
| EP3947199A1 (de) | Portionskapsel mit kennung | |
| WO2000031746A2 (de) | Vorrichtung zum auffangen und kühlen einer schmelze | |
| EP1101873A2 (de) | Filterrohr zum Einbringen in ein Bodenbohrloch sowie Verfahren zur Herstellung des Filterrohrs | |
| DE69935432T2 (de) | Filterelement und verfahren zu seiner herstellung | |
| DE202017107801U1 (de) | Thermisch gedämmtes Rohr | |
| DE19929760C2 (de) | Verfahren zur Herstellung metallischer, oxydischer oder keramischer Hohlkugeln | |
| DE102013201957A1 (de) | Baumbewässerungssystem | |
| DE19700760C2 (de) | Verfahren zur Herstellung von porösen Formkörpern aus thermoplastischen Polymeren, poröse Formkörper und Verwendung der Formkörper | |
| DE102010002064A1 (de) | Verfahren zur Sanierung einer Erdreich-Bohrung | |
| DE3732360C2 (de) | ||
| DE202020105486U1 (de) | Thermisch gedämmte Rohranordnung | |
| DE10327373B3 (de) | Polyglas-Filter | |
| EP1657042B1 (de) | Schleuderguss-Verfahren zur Ausbildung einer Randeinfassung und Begrenzungsform dafür | |
| EP2933029B1 (de) | Verfahren zum abdichten von einzelnen bereichen eines in einer deponie angeordneten gasbrunnens | |
| DE102019132253A1 (de) | Herstellvorrichtung zur additiven Fertigung dreidimensionaler Bauteile | |
| DE102005004372B4 (de) | Verfahren zum Verbinden poröser Membranen sowie hierdurch erzeugte Membranfiltervorrichtung | |
| WO2014195065A1 (de) | Verfahren und anordnung zum herstellen eines räumlichen werkstoffverbunds unter verwendung eines expansionskörpers | |
| DD280346A1 (de) | Verfahren und vorrichtung zum herstellen von sperrschichten gegen aufsteigende feuchtigkeit in waenden |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
| AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
| 17P | Request for examination filed |
Effective date: 20030904 |
|
| 17Q | First examination report despatched |
Effective date: 20031114 |
|
| AKX | Designation fees paid |
Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PFLEIDERER WATER SYSTEMS GMBH |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20060103 |