Patent US3176246A successfully refreshed from Google Patents.
Patent US4261801A successfully refreshed from Google Patents.
US4261801A
Expired / Lapsed
US
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Process for assembling a porous membrane on a support and assembly produced in this manner
Assignee: Compagnie Generale des Etablissements Michelin SCA
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Filing: 1979-11-16
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Granted: 1981-04-14
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Expires: 1999-11-16
Abstract
Abstract Process for the assembling at least one support, at least part of the surface of which conducts electrons, with at least one electrically insulating membrane, said membrane having pores at least part of which are open pores, is improved by causing an electrolytic depositing of at least one metal in a part of the open pores, said electrolytic deposit adhering to at least a part of the electron-conductive surface of the support.
Inventors
- 👤 Alain Coulombeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:26
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/22; H01M8/225; H01M4/00; H01M4/02; H01M4/64; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
183 words
Process for assembling at least one support, at least part of the surface of which conducts electrons, with at least one electrically insulating membrane, said membrane having pores at least part of which are open pores, the assembling being performed by causing an electrolytic depositing of at least one metal in a part of the open pores, said electrolytic deposit adhering to at least a part of the electron-conductive surface of the support, the assembled membrane being porous due to the presence of open pores without deposit, characterized by the following features: (a) the depositing is effected in pores having a zigzag structure and an average pore diameter which is substantially smaller than the thickness of the membrane so that the deposit is filamentary and/or branched; (b) the growth of the deposit is regulated in such a manner that the deposit does not pass through the membrane and that the face of the membrane opposite the support remains insulating; (c) the assembling is effected in such a manner that the assembled support and membrane are capable of being used in an electrochemical device.
Claim 2
Dependent Claim
183 words
Process for assembling at least one support, at least part of the surface of which conducts electrons, with at least one electrically insulating membrane, said membrane having pores at least part of which are open pores, the assembling being performed by causing an electrolytic depositing of at least one metal in a part of the open pores, said electrolytic deposit adhering to at least a part of the electron-conductive surface of the support, the assembled membrane being porous due to the presence of open pores without deposit, characterized by the following features: (a) the depositing is effected in pores having a zigzag structure and an average pore diameter which is substantially smaller than the thickness of the membrane so that the deposit is filamentary and/or branched; (b) the growth of the deposit is regulated in such a manner that the deposit does not pass through the membrane and that the face of the membrane opposite the support remains insulating; (c) the assembling is effected in such a manner that the assembled support and membrane are capable of being used in an electrochemical device.
Claim 3
Dependent Claim
51 words
Process according to claim 1, characterized by the fact that during the electrolytic depositing the support serves as cathode, at least one anode being used for the electrolytic depositing, and by the fact that the lines of the electric field which connect the anode and the cathode pass through the membrane.
Claim 4
Dependent Claim
30 words
Process according to claim 2, characterized by the fact that the lines of the electric field coming from the anode distribute themselves practically homogeneously over the surface of the membrane.
Claim 5
Dependent Claim
27 words
Process according to claim 1 or 2, characterized by the fact that the membrane is applied by compression onto the support before or during the electrolytic depositing.
Claim 6
Dependent Claim
50 words
Process according to claim 1 or 2, characterized by the fact that the membrane is prepared from a solution of at least one organic polymer in a solvent or in a mixture of solvents, said solution being sprayed under pressure to form fibers which are deposited directly onto the support.
Claim 7
Dependent Claim
23 words
Process according to claim 1 or 2, characterized by the fact that the electrolytic depositing is carried out with a pulsating direct current.
Claim 8
Dependent Claim
48 words
Process according to claim 6, characterized by the fact that the ratio Tp/Tn is approximately equal to 50%, Tp being the time of passage of the current and Tn the time during which the current does not pass, the frequency being approximately equal to 1 cycle per second.
Claim 9
Dependent Claim
28 words
Process according to claim 1 or 2, characterized by the fact that the surface of the support which conducts electrons is formed of a metal or an alloy.
Claim 10
Dependent Claim
38 words
Process according to claim 8, characterized by the fact that the metal of the electrolytic deposit is the same as the metal constituting the surface of the support or as a metal of the alloy constituting said surface.
Claim 11
Dependent Claim
30 words
Process according to claim 1 or 2, characterized by the fact that the electrolytic deposit covers only a part of the surface of the support in contact with the membrane.
Claim 12
Dependent Claim
16 words
Process according to claim 1 or 2, characterized by the fact that the support is perforated.
Claim 13
Dependent Claim
28 words
Process according to claim 11, characterized by the fact that the main face of the support in contact with the membrane has about 20% to 50% free surface.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |