WO2005024967A1 - Piezoaktor - Google Patents
Piezoaktor Download PDFInfo
- Publication number
- WO2005024967A1 WO2005024967A1 PCT/EP2004/009780 EP2004009780W WO2005024967A1 WO 2005024967 A1 WO2005024967 A1 WO 2005024967A1 EP 2004009780 W EP2004009780 W EP 2004009780W WO 2005024967 A1 WO2005024967 A1 WO 2005024967A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- counter
- piezo
- disk
- holder
- disc
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14201—Structure of print heads with piezoelectric elements
- B41J2/14298—Structure of print heads with piezoelectric elements of disc type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/04—Pumps having electric drive
- F04B43/043—Micropumps
- F04B43/046—Micropumps with piezoelectric drive
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
- H10N30/2047—Membrane type
Definitions
- the invention relates to a piezo actuator for miniaturized pumps, atomizers, valves or the like, with a piezo disk and a counter-holder disk coupled to the piezo disk, which is connected to its substrate in a fluid-tight manner at its edge and passes through the piezo disk while changing the volume of one between the counter-holder disk and cavities formed on the substrate.
- the curvature of the counter-holder disc can lead to a deformation of the substrate, which counteracts a desired change in the volume of the cavity.
- the actuator will then not reach its full efficiency. Fluctuations in manufacturing dimensions and material properties have a considerable influence on the extent of the efficiency reductions, so that close tolerance deviations must be observed with regard to performance data that is as constant as possible.
- the manufacturing process is correspondingly unstable.
- the present invention has for its object to provide a new piezo actuator of the type mentioned, which can be produced with less effort compared to the prior art with increased manufacturing reliability.
- the piezo actuator according to the invention which achieves this object is characterized by a weak point which runs along the connected edge of the counter-holder disc and forms a joint when the counter-holder disc is curved.
- the weak point or the joint advantageously prevents the substrate from moving together with the arching counter-holding disk. Regardless of dimensional fluctuations and changed material properties, the actuator achieves its full efficiency.
- the weak point is preferably formed by at least one annular groove and / or an annular step recess on the edge of the counter-holding disk.
- Such a type of modified counter-holder disc can advantageously be produced in one piece as a plastic injection-molded part.
- annular groove or step recess is provided in a part of the counter-holder disk which projects from the piezo disk, wherein the annular groove or step recess can be formed on the side of the counter-holder disk facing away or facing the substrate.
- Grooves or step recesses on both sides of the counter-holding disk are also conceivable, the grooves or recesses in question lying opposite one another.
- the annular groove preferably has a single deepest foot line and is preferably U-shaped or V-shaped in cross section. With such a cross-sectional shape, the position of the joint formed by the weak point is precisely defined, namely by the foot line. Fluctuations in manufacturing dimensions and material properties then have only a minor influence on the curvature behavior.
- the bottom line in the top view of the piezo disc runs between the edge of the piezo disc and the inner edge of an annular edge region in which the counter-holder disc is connected to the substrate, preferably glued or welded.
- the remaining material thickness at the weak point is preferably about 10 to 30% of the thickness of the counter-holding disk.
- the counter-holder disc has a recess, which may be open towards the annular groove and / or step recess, for the supply of a connecting conductor to the electrode of the piezo disc facing the counter-holder disc.
- the electrode on the side of the piezo disk facing away from the counter-holding disk can have an edge recess into which a contact layer electrically connected to the opposite electrode extends. In this case, contacting of the electrodes of the piezo disk is advantageously possible only from the side facing away from the counter-holder disk.
- FIGS. 2 to 4 partial representations of a micropump with actuators according to further exemplary embodiments for the present invention
- FIG. 5 shows a first embodiment for contacting the piezo disk of an actuator according to the invention
- FIG. 6 shows a second embodiment for contacting the piezo disk in an actuator according to the invention.
- a micropump shown in FIG. 1 has a ceramic piezo disk 1, a counter-holder disk 2, which is coupled to the piezo disk and projects beyond the edge of the piezo disk, and a pump body 3 connected to the counter-holder disk.
- the diameter of the pump body matches that of the counter-holder disc.
- a pump cavity 4 is formed between the counter-holder disk and the pump body.
- micropump such as valves, channels and electrodes of the piezo disk, are not shown in FIG. 1.
- the piezo disc consists of a ceramic material.
- the counter-holder disc and the pump body are one-piece injection-molded parts made of plastic, the diameter of which in the exemplary embodiment shown is approximately 10 mm.
- the thickness of the counter holder disc is 0.7 mm.
- the piezo disk is glued to the counter bracket disk 2 over its entire side facing the counter bracket disk, for which purpose an electrically conductive adhesive forming an electrode of the piezo disk is used and the adhesive layer could be led out of the adhesive gap to form a contacting tab.
- annular groove 6 is formed between the piezo disk 1 and the inner edge of the ring projection 5 or edge region 18 in the counter-holder disk, the cross section of which has a V-shape and the lowest foot line 7 approximately in the middle between the edge of the Piezo disk and the aforementioned inner edge runs.
- the counter-holder disk is weakened along the glued edge area 18 in such a way that a joint is formed which prevents the curvature of the counter-holder disk from being transmitted to its edge area and via the adhesive connection to the pump body.
- the position of this joint is exactly defined by the foot line 7.
- a curvature of the pump body 3 would have the consequence that the change in volume of the pump cavity 4 associated with the curvature of the counter-holding disk 2 would be partially canceled and the desired pumping effect would not be achieved.
- annular groove 6a is formed in a counter-holder disc 2a, the cross-section of which is not V-shaped but U-shaped.
- the annular groove has a single deepest root line 7a, which exactly shows the position of the through the annular groove 6a formed joint determined.
- two annular grooves 6b and 6b 'with a V-profile are formed in a counter-holder disc 2b, whose base lines 7b and 7b', in seen the top view of the pump, are aligned with each other. Both ring grooves are of the same depth. About 25% of the material thickness of the counter-holding disc remains between the base lines. A neutral bending line 8 of the counter-holder disk advantageously penetrates the remaining material area. Tensile and compressive loads in this area are minimized.
- a counter-holder disc 2c has a step recess 9 instead of an annular groove 6, the width of an annular shoulder 10 formed by the step recess 9 being somewhat larger than the width of an annular projection 5c connected to the counter-holder disc 2c.
- the micropump shown in FIG. 5, which largely corresponds to the micropump of FIG. 1, has a piezo disk 1 d with electrodes 11 and 12, which are formed by metal layers on the piezoceramic. While the electrode 12 occupies the entire surface of the piezo disk facing the counter-holder disk, a recess 13 is formed in the electrode 11 on the top of the piezo disk, into which a contact layer 14 connected to the electrode 12 and encompassing the piezo disk at the edge projects. There is thus the possibility of attaching connecting conductors 15 and 16 for the electrodes 11 and 12 exclusively on the side of the piezo disk facing away from the counter-holding disk, unaffected by an annular groove 6d.
- electrodes 11 e and 12 e are attached to a piezo disk, each of which extends over the entire disk surface.
- a recess 17 connected to an annular groove 6e enables the connection of a conductor 16e to the electrode 12e.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04764739.1A EP1661190B1 (de) | 2003-09-04 | 2004-09-02 | Piezoaktor |
| US10/570,414 US7482733B2 (en) | 2003-09-04 | 2004-09-02 | Piezoactuator |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20313727.2 | 2003-09-04 | ||
| DE20313727U DE20313727U1 (de) | 2003-09-04 | 2003-09-04 | Piezoaktor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005024967A1 true WO2005024967A1 (de) | 2005-03-17 |
Family
ID=34072148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2004/009780 Ceased WO2005024967A1 (de) | 2003-09-04 | 2004-09-02 | Piezoaktor |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7482733B2 (de) |
| EP (1) | EP1661190B1 (de) |
| DE (1) | DE20313727U1 (de) |
| WO (1) | WO2005024967A1 (de) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8870090B2 (en) | 2007-02-01 | 2014-10-28 | Aptar France Sas | Volatile liquid droplet dispenser device |
| US9010657B2 (en) | 2008-06-03 | 2015-04-21 | Aptar France Sas | Volatile liquid droplet dispenser device |
| US9604242B2 (en) | 2005-11-30 | 2017-03-28 | Aptar France Sas | Volatile liquid droplet dispenser device |
| US9662650B2 (en) | 2013-07-29 | 2017-05-30 | Atlas Genetics Limited | Fluidic cartridge and method for processing a liquid sample |
| US9816135B2 (en) | 2013-07-29 | 2017-11-14 | Atlas Genetics Limited | Fluidic cartridge for nucleic acid amplification and detection |
| US9908114B2 (en) | 2013-07-29 | 2018-03-06 | Atlas Genetics Limited | Cartridge, cartridge reader and method for preventing reuse of the cartridge |
| US9993818B2 (en) | 2013-07-29 | 2018-06-12 | Atlas Genetics Limited | Valve which depressurises, and a valve system |
| US9999883B2 (en) | 2013-07-29 | 2018-06-19 | Atlas Genetics Limited | System and method for processing fluid in a fluidic cartridge |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005104038A (ja) * | 2003-09-30 | 2005-04-21 | Fuji Photo Film Co Ltd | 吐出ヘッド及び液吐出装置 |
| EP1886362A2 (de) * | 2005-05-31 | 2008-02-13 | Unison Products | Auf umweltbedingungen reagierende membran und stützstruktur |
| US20070120896A1 (en) * | 2005-11-30 | 2007-05-31 | Xerox Corporation | Drop generator |
| KR100738102B1 (ko) | 2006-02-01 | 2007-07-12 | 삼성전자주식회사 | 압전 방식의 잉크젯 프린트헤드 |
| US7608983B2 (en) * | 2006-07-18 | 2009-10-27 | Brother Kogyo Kabushiki Kaisha | Piezoelectric actuator, liquid transporting apparatus, and liquid-droplet jetting apparatus |
| JP5161698B2 (ja) * | 2008-08-08 | 2013-03-13 | 太陽誘電株式会社 | 圧電薄膜共振子及びこれを用いたフィルタあるいは分波器 |
| US8189851B2 (en) | 2009-03-06 | 2012-05-29 | Emo Labs, Inc. | Optically clear diaphragm for an acoustic transducer and method for making same |
| US20110044476A1 (en) * | 2009-08-14 | 2011-02-24 | Emo Labs, Inc. | System to generate electrical signals for a loudspeaker |
| US20120038469A1 (en) * | 2010-08-11 | 2012-02-16 | Research In Motion Limited | Actuator assembly and electronic device including same |
| US9094743B2 (en) | 2013-03-15 | 2015-07-28 | Emo Labs, Inc. | Acoustic transducers |
| USD733678S1 (en) | 2013-12-27 | 2015-07-07 | Emo Labs, Inc. | Audio speaker |
| USD741835S1 (en) | 2013-12-27 | 2015-10-27 | Emo Labs, Inc. | Speaker |
| US9610579B2 (en) | 2014-01-07 | 2017-04-04 | Daktari Diagnostics, Inc. | Fluid delivery devices, systems, and methods |
| USD748072S1 (en) | 2014-03-14 | 2016-01-26 | Emo Labs, Inc. | Sound bar audio speaker |
| DE102014207490B3 (de) | 2014-04-17 | 2015-07-02 | Carl Zeiss Ag | Brillenglas für eine auf den Kopf eines Benutzers aufsetzbare und ein Bild erzeugende Anzeigevorrichtung und Anzeigevorrichtung mit einem solchen Brillenglas |
| JP6558104B2 (ja) * | 2015-07-02 | 2019-08-14 | セイコーエプソン株式会社 | 圧電デバイス、液体吐出ヘッド、および、液体吐出装置 |
| US10536815B2 (en) * | 2017-06-08 | 2020-01-14 | Ford Global Technologies, Llc | Tracking a wireless device using a seamless handoff between a vehicle and a mobile device |
| CN114222859A (zh) * | 2019-09-11 | 2022-03-22 | 京瓷株式会社 | 压电泵以及泵单元 |
| JP2024015457A (ja) * | 2020-12-08 | 2024-02-02 | ソニーグループ株式会社 | 流体制御装置、及び電子機器 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5898259A (ja) * | 1981-12-08 | 1983-06-11 | Matsushita Electric Ind Co Ltd | インクジエツトヘツド |
| DE4443244A1 (de) * | 1994-11-25 | 1996-05-30 | Francotyp Postalia Gmbh | Anordnung für einen Tintendruckkopf aus einzelnen Tintendruckmodulen |
| EP0733480A1 (de) * | 1995-03-23 | 1996-09-25 | SHARP Corporation | Für eine Düsenanordnung mit hoher Dichte geeigneter Tintenstrahldruckkopf |
| EP0786345A2 (de) * | 1996-01-26 | 1997-07-30 | Seiko Epson Corporation | Tintenstrahlaufzeichnungskopf und Herstellungsverfahren dafür |
| US20020140786A1 (en) * | 2001-03-30 | 2002-10-03 | Brother Kogyo Kabushiki Kaisha | Liquid droplet ejection device |
| US20020149653A1 (en) * | 2001-01-31 | 2002-10-17 | Nec Corporation | Ink jet printer head and piezoelectric actuator for the head |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19534378C1 (de) * | 1995-09-15 | 1997-01-02 | Inst Mikro Und Informationstec | Fluidpumpe |
| DE19546570C1 (de) * | 1995-12-13 | 1997-03-27 | Inst Mikro Und Informationstec | Fluidpumpe |
| US6091182A (en) * | 1996-11-07 | 2000-07-18 | Ngk Insulators, Ltd. | Piezoelectric/electrostrictive element |
| DE19646676C1 (de) * | 1996-11-12 | 1998-04-23 | Siemens Ag | Piezoaktor mit neuartiger Kontaktierung und Herstellverfahren |
| DE19735156C1 (de) * | 1996-11-25 | 1999-04-29 | Fraunhofer Ges Forschung | Piezoelektrisch betätigtes Mikroventil |
| DE19856583A1 (de) * | 1998-12-08 | 2000-06-21 | Fraunhofer Ges Forschung | Mikromechanische Aktorstruktur und Mikroventil |
| JP4058223B2 (ja) * | 1999-10-01 | 2008-03-05 | 日本碍子株式会社 | 圧電/電歪デバイス及びその製造方法 |
-
2003
- 2003-09-04 DE DE20313727U patent/DE20313727U1/de not_active Expired - Lifetime
-
2004
- 2004-09-02 EP EP04764739.1A patent/EP1661190B1/de not_active Expired - Lifetime
- 2004-09-02 WO PCT/EP2004/009780 patent/WO2005024967A1/de not_active Ceased
- 2004-09-02 US US10/570,414 patent/US7482733B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5898259A (ja) * | 1981-12-08 | 1983-06-11 | Matsushita Electric Ind Co Ltd | インクジエツトヘツド |
| DE4443244A1 (de) * | 1994-11-25 | 1996-05-30 | Francotyp Postalia Gmbh | Anordnung für einen Tintendruckkopf aus einzelnen Tintendruckmodulen |
| EP0733480A1 (de) * | 1995-03-23 | 1996-09-25 | SHARP Corporation | Für eine Düsenanordnung mit hoher Dichte geeigneter Tintenstrahldruckkopf |
| EP0786345A2 (de) * | 1996-01-26 | 1997-07-30 | Seiko Epson Corporation | Tintenstrahlaufzeichnungskopf und Herstellungsverfahren dafür |
| US20020149653A1 (en) * | 2001-01-31 | 2002-10-17 | Nec Corporation | Ink jet printer head and piezoelectric actuator for the head |
| US20020140786A1 (en) * | 2001-03-30 | 2002-10-03 | Brother Kogyo Kabushiki Kaisha | Liquid droplet ejection device |
Non-Patent Citations (2)
| Title |
|---|
| HARTMANN HANS-JOACHIM ET AL.: "Micromoulded Plastic Components", MEDICAL DEVICE TECHNOLOGY. APR 2002, vol. 13, no. 3, April 2002 (2002-04-01), pages 28 - 30, XP002310052, ISSN: 1048-6690 * |
| PATENT ABSTRACTS OF JAPAN vol. 0071, no. 99 (M - 240) 3 September 1983 (1983-09-03) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9604242B2 (en) | 2005-11-30 | 2017-03-28 | Aptar France Sas | Volatile liquid droplet dispenser device |
| US8870090B2 (en) | 2007-02-01 | 2014-10-28 | Aptar France Sas | Volatile liquid droplet dispenser device |
| US9010657B2 (en) | 2008-06-03 | 2015-04-21 | Aptar France Sas | Volatile liquid droplet dispenser device |
| US9662650B2 (en) | 2013-07-29 | 2017-05-30 | Atlas Genetics Limited | Fluidic cartridge and method for processing a liquid sample |
| US9816135B2 (en) | 2013-07-29 | 2017-11-14 | Atlas Genetics Limited | Fluidic cartridge for nucleic acid amplification and detection |
| US9908114B2 (en) | 2013-07-29 | 2018-03-06 | Atlas Genetics Limited | Cartridge, cartridge reader and method for preventing reuse of the cartridge |
| US9993818B2 (en) | 2013-07-29 | 2018-06-12 | Atlas Genetics Limited | Valve which depressurises, and a valve system |
| US9999883B2 (en) | 2013-07-29 | 2018-06-19 | Atlas Genetics Limited | System and method for processing fluid in a fluidic cartridge |
Also Published As
| Publication number | Publication date |
|---|---|
| DE20313727U1 (de) | 2005-01-13 |
| EP1661190B1 (de) | 2016-11-23 |
| US7482733B2 (en) | 2009-01-27 |
| EP1661190A1 (de) | 2006-05-31 |
| US20070007859A1 (en) | 2007-01-11 |
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