US20060213767A1 - Bipolar plate comprising metal wire - Google Patents

Bipolar plate comprising metal wire Download PDF

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Publication number
US20060213767A1
US20060213767A1 US10/554,515 US55451505A US2006213767A1 US 20060213767 A1 US20060213767 A1 US 20060213767A1 US 55451505 A US55451505 A US 55451505A US 2006213767 A1 US2006213767 A1 US 2006213767A1
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US
United States
Prior art keywords
polymer wall
metal wire
electrode
bipolar plate
knitted fabric
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.)
Abandoned
Application number
US10/554,515
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English (en)
Inventor
Lieven Anaf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bekaert NV SA
Original Assignee
Bekaert NV SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bekaert NV SA filed Critical Bekaert NV SA
Assigned to N.V. BEKAERT S.A. reassignment N.V. BEKAERT S.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ANAF, LIEVEN
Publication of US20060213767A1 publication Critical patent/US20060213767A1/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
    • H01M4/8605—Porous electrodes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/60—Constructional parts of cells
    • C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0204—Non-porous and characterised by the material
    • H01M8/0221—Organic resins; Organic polymers
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the present invention relates to bipolar plates, especially for use in electrochemical processes.
  • the present invention also relates to methods for providing such bipolar plates
  • Bipolar plates are well known for use in electrochemical processes, e.g. full cells.
  • Reactors of electrochemical processes may comprise an anode and a cathode chamber being separated from each other by means of a liquid and gas tight barrier. Meanwhile, an electrically conductive electrode is provided in this anode and cathode chamber.
  • the bipolar plate may act as a liquid and gas barrier between anode and cathode chamber.
  • the electrodes from the anode side and the cathode side are to be in electrical contact with each other.
  • EP229473B1 describes such a bipolar plate comprising a polymer wall and a first and a second electrode, each at one side of the polymer wall.
  • the electrodes are provided using an undulated, possibly perforated metal sheet or an undulated wire mesh, in the form of a woven structure.
  • the electrodes are partially embedded in the polymer wall, and make electrical contact with each other in the polymer wall.
  • the presence of such amount of metal sheet causes significant pressure drops necessary for evacuation of distribution of reactant gasses in the electrodes. It also causes the bipolar plate to have a relatively large weight.
  • a bipolar plate as subject of the invention comprises a polymer wall and a first and a second electrode.
  • the first electrode is positioned at a first side of the polymer wall, whereas the second electrode is positioned at the second side of the polymer wall. Both electrodes are partially embedded in the polymer wall, making electrical contact with each other in this polymer wall.
  • the bipolar plate as subject of the invention is characterized in that at least one of the first or second electrodes comprises a metal wire knitted fabric, which is partially embedded in the polymer wall. Possibly both electrodes comprise metal wire knitted fabrics, which are partially embedded in the polymer wall.
  • the electrodes may even consist of metal wire knitted fabric. Possibly each electrode comprises more than one layer of metal wire knitted fabric, all layers added one on top of the other. The layer closest to the polymer wall is partially embedded in the polymer wall.
  • bipolar plates as subject of the invention comprising electrodes consisting of possibly more than one layer of metal wire knitted fabric for each electrode, are used in electrochemical processes, the gasses obtained by the chemical reactions may more easily and with less pressure drop be evacuated from the electrodes.
  • the metal wire knitted product, used to provide a bipolar plate as subject of the invention, is not necessarily to be undulated as for the bipolar plates of the prior art. Therefor one step in production of bipolar plates may be avoided, further reducing production costs.
  • Metal wire having a diameter in the range of 0.05 mm to 0.5 mm may be used to provide the metal wire knitted fabrics. More preferred, metal wires with a diameter in the range of 0.05 mm to 0.3 mm, such as in the range of 0.05 mm to 0.25 mm or in the range of 0.05 mm to 0.1 mm may be used. As metal wire, metal wires out of Ni or Ni-alloy may be used. Alternatively titanium, titanium alloys, or stainless steel alloys, such as alloys of the AISI 300-series or AISI 400-series may be used, e.g. AISI 302, AISI 304, AISI 310, AISI 316, AISI 316L, AISI 347, AISI 430, AISI 434 or AISI 444.
  • AISI 302 AISI 304, AISI 310, AISI 316, AISI 316L, AISI 347, AISI 430, AISI 4
  • the polymer wall preferably is a polymer sheet.
  • the thickness of the polymer wall is preferably more than 0.5 mm but less than 5 mm. The selection of the thickness may influence the gas and liquid impermeability of the polymer wall, and may influence the diffusion coefficient of gas molecules through the polymer wall.
  • the polymer material used to provide the polymer wall is preferably selected from the group consisting of fluoro-polymers such as polytetrafluorethylene, or polyolefines, such as e.g. polypropylene, polyethylene or high-density polyethylene, polyacetal or polysulfon.
  • fluoro-polymers such as polytetrafluorethylene, or polyolefines, such as e.g. polypropylene, polyethylene or high-density polyethylene, polyacetal or polysulfon.
  • the polymer wall is a polymer sheet, being obtained by extrusion processes. Extruded polymer sheets guarantee to a larger extent the gas- and liquid-tightness.
  • the two electrodes of which at least one comprises a metal wire knitted fabric, are embedded partially in the polymer wall.
  • the metal wire knitted fabrics are laminated together with the polymer wall, which is preferably a polymer sheet.
  • the depth of the embedding of one of the metal wire knitted fabrics of the electrodes is chosen in such a way that both electrodes contact each other in the polymer wall, so providing electrical contact between the two electrodes.
  • the thickness of the metal wire knitted fabric being more than half of the thickness of the polymer wall.
  • the metal wire knitted fabric has a thickness less than 5 mm.
  • the density of the metal wire knitted fabric is preferably less than 10%.
  • the electrode may comprise additional elements next to the partially embedded metal wire knitted fabric, e.g. spacing elements or catalyst carrying elements. Possibly more than one layer of metal wire knitted fabric may be used for each electrode, one layer being on top of the other, as an example to provide sufficient volume to the electrode or to provide the other elements of the electrode.
  • a catalyst for use in the electrochemical reaction may be present.
  • a catalyst selected from the group consisting of Rh, Ru, Pt, Pd, Ir, Ag, Ni, Cu, WC or AU or combinations thereof may be used.
  • the catalyst on the first electrode may be identical or different as the catalyst on the second electrode.
  • the catalysts are only present at a certain zone of the electrode.
  • the catalyst may only be present at the side of the electrode removed from the polymer wall.
  • an electrode may comprise a first metal wire knitted fabric, partially embedded in the polymer wall as subject of the invention.
  • a second metal wire knitted fabric functioning as spacing layer between the first metal wire knitted fabric and the catalyst carrier is present on top of the first metal wire knitted fabric.
  • a third metal fiber knitted fabric being coated with a catalyst, is provided functioning as catalyst carrier.
  • the bipolar plates as subject of the invention may be used in all kinds of electrochemical reactors, such as e.g. fuel cells, electrolysers or H 2 -production units.
  • the electrode comprises more than one layer of metal wire knitted fabric, only some layers may be coated with a catalyst. Most preferred, the metal wire knitted fabric who is partially embedded in the polymer wall is not coated with a catalyst.
  • the method provided bipolar plates in a more economic way, and in the mean time it is easy to control, as some process parameters, e.g. pressure during lamination is less critical.
  • Some process parameters e.g. pressure during lamination is less critical.
  • the latter is due to the elasticity the metal wire knitted fabrics possess in a direction perpendicular to its surface.
  • the method of production of a bipolar plate as subject of the invention further comprises the step of coating one or both of the metal wire knitted fabrics with a catalyst.
  • the method of production of a bipolar plate further comprises the step of adding different layers of metal wire knitted fabric one on top of the other before or after laminating, in order to obtain electrodes comprising more than one layer of metal wire knitted fabric.
  • FIG. 1 shows schematically a side view of a bipolar plate as subject of the invention
  • FIG. 2 shows schematically a cross section according to plane AA′ of a bipolar plate as subject of the invention of FIG. 1 .
  • FIG. 3 and FIG. 4 show schematically a cross section of alternative bipolar plates as subject of the invention.
  • FIG. 1 A side view of a bipolar plate 110 as subject of the invention is shown in FIG. 1 .
  • a polymer wall 120 has two outer surfaces, and at least in one surface 121 , a metal wire knitted fabric 130 being part of an electrode is partially embedded in the polymer wall 120 .
  • a metal wire knitted fabric 130 being part of an electrode is partially embedded in the polymer wall 120 .
  • possibly another metal wire knitted fabric 140 being part of the electrode at the other side 122 is partially embedded in the polymer wall 120 .
  • FIG. 2 shows a cross section of the bipolar plate 110 , having two electrodes comprising metal wire knitted fabric ( 130 and 140 ), one at each side of the polymer wall 120 .
  • a bipolar plate 110 comprises a polymer wall 120 with a thickness 221 , e.g. 2 mm.
  • a metal wire knitted fabric 130 and 140 is partially embedded over a depth of slightly more than half of the thickness 221 of the polymer wall 120 . It is understood that the thickness 233 and 243 of the metal wire knitted fabrics is to be substantially more than this half of the thickness 221 of the polymer wall 120 , in order to provide a significant volume to the electrode which is not embedded in the polymer wall, providing void volume to the electrodes for gas evacuation of supply of reactant gas or reactant liquid.
  • the metal wire knitted fabric 130 may be coated with a catalyst based on Pt and Ru.
  • the metal wire knitted fabric 140 may be coated with a catalyst based on Pt and Ir.
  • the metal wire knitted fabrics 130 and 140 may be a double bed knitted structure (either warp of weft knitted) using a machine gauge of 5 (5 needles per inch of needle bed). A nickel wire of diameter 250 ⁇ m may be used.
  • the metal wire knitted fabric is preferably embedded in the polymer wall, being preferably a polymer sheet, by laminating the knitted fabric in the sheet.
  • FIG. 3 A cross section of an alternative bipolar plate as subject of the invention is shown in FIG. 3 .
  • the bipolar plate 310 comprises a polymer wall 320 , being an extruded polymer sheet of high-density polypropylene (HDPP), polysulfon, polyacetal or high-density polyethylene (HDPE).
  • the thickness 321 of the polymer sheet is approximately 1 mm.
  • a first electrode 330 is located, comprising two layers of metal wire knitted fabric (indicated 331 and 332 ), the layer of metal wire knitted fabric 331 , closest to the polymer wall 320 is partially embedded in the polymer wall 320 .
  • the thickness of the electrode (indicated 333 ) being the sum of thickness of layer 331 and layer 332 , is approximately 7 mm, wherein each layer 331 and 332 has a thickness of approximately 3.5 mm.
  • Layer 331 is embedded in polymer wall over a depth of slightly more than 0.5 mm.
  • a second electrode 340 is located, comprising two layers of metal wire knitted fabric (indicated 341 and 342 ), the layer of metal wire knitted fabric 341 , closest to the polymer wall 320 is partially embedded in the polymer wall 320 .
  • Layer 341 is embedded in polymer wall over a depth of slightly more than 0.5 mm.
  • both metal wire knitted products 331 and 341 are embedded using a depth of slightly more than half of the thickness 321 of the polymer wall, an electrical contact between both metal wire knitted fabrics 331 and 341 , and thus between both electrodes 330 and 340 is ensured.
  • the metal wire knitted fabrics 331 , 332 , 341 , and 341 may be a single jersey knitted structure using a machine gauge of 5 (5 needles per inch of needle bed).
  • a nickel wire of diameter 250 ⁇ m may be used, providing a metal wire knitted fabric having a thickness of approximately 3.5 mm, having a weight of 47.5 g/m 2 and density of 1.7%
  • the layer 332 may be coated with a catalyst based on Pt and In.
  • the layer 342 may be coated with a catalyst based on Pt and Ir.
  • FIG. 4 A cross section of an alternative bipolar plate as subject of the invention is shown in FIG. 4 .
  • the bipolar plate 410 comprises a polymer wall 420 , being an extruded polymer sheet of high-density polypropylene (HDPP), polysulfon, polyacetal or high-density polyethylene (HDPE).
  • the thickness 421 of the polymer sheet is approximately 1 mm.
  • a first electrode 430 is located, comprising three layers of metal wire knitted fabric (indicated 431 , 432 and 433 ), the layer of metal wire knitted fabric 431 , closest to the polymer wall 420 is partially embedded in the polymer wall 420 .
  • the thickness of the electrode (indicated 434 ), being the sum of thickness of layer 431 , layer 432 and layer 433 , is approximately 10.5 mm, wherein each layer 431 , 432 and 433 has a thickness of approximately 3.5 mm.
  • Layer 431 is embedded in polymer wall over a depth of slightly more than 0.5 mm.
  • a second electrode 440 is located, comprising three layers of metal wire knitted fabric (indicated 441 , 442 and 443 ), the layer of metal wire knitted fabric 441 , closest to the polymer wall 420 is partially embedded in the polymer wall 420 .
  • Layer 441 is embedded in polymer wall over a depth of slightly more than 0.5 mm.
  • both metal wire knitted products 431 and 441 are embedded using a depth of slightly more than half of the thickness 421 of the polymer wall, an electrical contact between both metal wire knitted fabrics 431 and 441 , and thus between both electrodes 430 and 440 is ensured.
  • the metal wire knitted fabrics 441 , 442 , 443 , 431 , 432 and 433 may be identical as the metal wire knitted fabric used for the embodiment as shown in FIG. 3 .
  • the metal wire knitted fabrics 432 and 442 function as spacing layers between the first metal wire knitted fabrics 431 and 441 , and the third metal wire knitted fabrics 433 and 443 , which are coated with a catalyst based on Pt and In for metal wire knitted fabric 433 and a catalyst based on Pt and Ir for metal wire knitted fabric 443 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Inert Electrodes (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
US10/554,515 2003-04-29 2003-04-29 Bipolar plate comprising metal wire Abandoned US20060213767A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2003/050130 WO2004097073A1 (en) 2003-04-29 2003-04-29 Bipolar plate comprising metal wire

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US20060213767A1 true US20060213767A1 (en) 2006-09-28

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US10/554,515 Abandoned US20060213767A1 (en) 2003-04-29 2003-04-29 Bipolar plate comprising metal wire

Country Status (7)

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US (1) US20060213767A1 (zh)
EP (1) EP1649081A1 (zh)
JP (1) JP2006524747A (zh)
CN (1) CN1771354A (zh)
AU (1) AU2003238520A1 (zh)
CA (1) CA2520918A1 (zh)
WO (1) WO2004097073A1 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090286463A1 (en) * 2008-05-13 2009-11-19 Daniels Gregory S Ember-resistant and flame-resistant roof ventilation system
US20100262214A1 (en) * 2009-04-08 2010-10-14 National Ict Australia Limited Stitched components of an active implantable medical device
US8782967B2 (en) 2010-09-27 2014-07-22 Gregory S. Daniels Above sheathing ventilation system
US10011925B2 (en) 2015-05-14 2018-07-03 Gunze Limited Conductive stretchable knitted fabric and harness for conduction
DE102021128017A1 (de) 2021-10-27 2023-04-27 Texotex Ug (Haftungsbeschränkt) Textiles Flächengebilde

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CN102064328B (zh) * 2010-12-02 2013-03-20 北京印刷学院 质子交换膜燃料电池用的复合材料双极板及其制作方法
US9200375B2 (en) 2011-05-19 2015-12-01 Calera Corporation Systems and methods for preparation and separation of products
WO2013148216A1 (en) * 2012-03-29 2013-10-03 Calera Corporation Electrochemical hydroxide systems and methods using metal oxidation
TWI633206B (zh) 2013-07-31 2018-08-21 卡利拉股份有限公司 使用金屬氧化物之電化學氫氧化物系統及方法
CN107109672B (zh) 2014-09-15 2019-09-27 卡勒拉公司 使用金属卤化物形成产物的电化学系统和方法
CN108290807B (zh) 2015-10-28 2021-07-16 卡勒拉公司 电化学、卤化和氧卤化的系统及方法
US10619254B2 (en) 2016-10-28 2020-04-14 Calera Corporation Electrochemical, chlorination, and oxychlorination systems and methods to form propylene oxide or ethylene oxide
WO2019060345A1 (en) 2017-09-19 2019-03-28 Calera Corporation SYSTEMS AND METHODS USING LANTHANIDE HALIDE
US10590054B2 (en) 2018-05-30 2020-03-17 Calera Corporation Methods and systems to form propylene chlorohydrin from dichloropropane using Lewis acid
CN108878921B (zh) * 2018-06-13 2020-10-16 珠海冠宇电池股份有限公司 一种燃料电池用双极板及其制备方法
JP2021155779A (ja) * 2020-03-26 2021-10-07 三菱マテリアル株式会社 水電解用電極、および、水電解装置

Citations (4)

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US5821009A (en) * 1997-03-03 1998-10-13 Space Systems/Loral, Inc. Fault tolerant bipolar gas electrode design for a rechargeable battery
US6037072A (en) * 1996-09-27 2000-03-14 Regents Of The University Of California Fuel cell with metal screen flow field
US6103413A (en) * 1998-05-21 2000-08-15 The Dow Chemical Company Bipolar plates for electrochemical cells
US20010006745A1 (en) * 1998-07-21 2001-07-05 Sorapec Bipolar collector for fuel cell

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8530893D0 (en) * 1985-12-16 1986-01-29 Ici Plc Electrode

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6037072A (en) * 1996-09-27 2000-03-14 Regents Of The University Of California Fuel cell with metal screen flow field
US5821009A (en) * 1997-03-03 1998-10-13 Space Systems/Loral, Inc. Fault tolerant bipolar gas electrode design for a rechargeable battery
US6103413A (en) * 1998-05-21 2000-08-15 The Dow Chemical Company Bipolar plates for electrochemical cells
US20010006745A1 (en) * 1998-07-21 2001-07-05 Sorapec Bipolar collector for fuel cell

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090286463A1 (en) * 2008-05-13 2009-11-19 Daniels Gregory S Ember-resistant and flame-resistant roof ventilation system
US9011221B2 (en) * 2008-05-13 2015-04-21 Gregory S. Daniels Ember-resistant and flame-resistant roof ventilation
US11383111B2 (en) * 2008-05-13 2022-07-12 Gregory S. Daniels Ember-resistant and flame-resistant roof ventilation system
US11850457B2 (en) 2008-05-13 2023-12-26 O'daniels, Llc. Ember-resistant and flame-resistant roof ventilation system
US20100262214A1 (en) * 2009-04-08 2010-10-14 National Ict Australia Limited Stitched components of an active implantable medical device
US9089714B2 (en) * 2009-04-08 2015-07-28 Saluda Medical Pty Limited Stitched components of an active implantable medical device
US8782967B2 (en) 2010-09-27 2014-07-22 Gregory S. Daniels Above sheathing ventilation system
US9140013B2 (en) 2010-09-27 2015-09-22 Gregory S. Daniels Above sheathing ventilation system
US10011925B2 (en) 2015-05-14 2018-07-03 Gunze Limited Conductive stretchable knitted fabric and harness for conduction
DE102021128017A1 (de) 2021-10-27 2023-04-27 Texotex Ug (Haftungsbeschränkt) Textiles Flächengebilde
EP4173692A1 (de) * 2021-10-27 2023-05-03 TexoTex UG (haftungsbeschränkt) Textiles flächengebilde zur zersetzung von molekülen mittels elektro-katalytischer elektrolyse

Also Published As

Publication number Publication date
CA2520918A1 (en) 2004-11-11
EP1649081A1 (en) 2006-04-26
WO2004097073A1 (en) 2004-11-11
AU2003238520A1 (en) 2004-11-23
JP2006524747A (ja) 2006-11-02
CN1771354A (zh) 2006-05-10

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Owner name: N.V. BEKAERT S.A., BELGIUM

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ANAF, LIEVEN;REEL/FRAME:017347/0120

Effective date: 20030805

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION