Patent US3350232A successfully refreshed from Google Patents.
US3350232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homeoporous electrode for electrochemical devices, method of its manufacture, and fuel cell incorporating such electrodes
Assignee: VARTA AG
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Filing: 1963-06-21
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Granted: 1967-10-31
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Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 Ryhiner Gunther
- 👤 Dohren Hans H Von
- 👤 Jung Margarete
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:52
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8803; H01M4/881; H01M8/00; H01M8/10; H01M8/1016; H01M2300/00; H01M2300/0088; H01M2300/0091; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
80 words
A SOLIDIFIED POLYELECTROLYTE GEL CONSISTING OF A GEL OF A POLYELECTROLYTE SELECTED FROM THE GROUP CONSISTING OF ALGINATES, PECTINS AND CARBOXYMETHYL CELLULOSE, SAID GEL BEING REENFORCED AND STABILIZED WITH A SYNTHAETIC RESIN, SAID GEL HAVING TWO OPPOSITE SURFACES, AT LEAST ONE OF SAID SURFACES BEING CONSTITUTED BY A HOMEOPOROUS LAYER DEFINING A MULTIPLICITY OF EVENLY DISTRIBUTED AND PARALLE CAPILLARIES OF SUBSTANTIALLY THE SAME SIZE AND SHAPE, AND ALL SURFACES OF THE HOMEOPOROUS LAYER BEING COVERED BY AN ELECTRICALLY CONDUCTIVE METAL.
Claim 2
Dependent Claim
80 words
A SOLIDIFIED POLYELECTROLYTE GEL CONSISTING OF A GEL OF A POLYELECTROLYTE SELECTED FROM THE GROUP CONSISTING OF ALGINATES, PECTINS AND CARBOXYMETHYL CELLULOSE, SAID GEL BEING REENFORCED AND STABILIZED WITH A SYNTHAETIC RESIN, SAID GEL HAVING TWO OPPOSITE SURFACES, AT LEAST ONE OF SAID SURFACES BEING CONSTITUTED BY A HOMEOPOROUS LAYER DEFINING A MULTIPLICITY OF EVENLY DISTRIBUTED AND PARALLE CAPILLARIES OF SUBSTANTIALLY THE SAME SIZE AND SHAPE, AND ALL SURFACES OF THE HOMEOPOROUS LAYER BEING COVERED BY AN ELECTRICALLY CONDUCTIVE METAL.
Claim 3
Independent Claim
96 words
A METHOD OF MANUFACTURING A HOMEOPOROUS GAS DIFFUSION ELECTARODE, COMPRISING THE STEPS OF PRODUCING AN IONOTROPIC AQUEOUS GEL OF A POLYELECTROLYTE SELECTED FROM THE GROUP CONSISTING OF ALGINATES, PECTINS AND CARBOXYMETHYL CELLULOSE, SAID GEL CONSISTING OF A NON-POROUS LAYER AND A LAYER DEFINING A MULTIPLICITY OF EVENLY DISTRIBUTED AND PARALLEL CAPILLARIES OF SUBSTANTIALLY THE SAME SIZE AND SHAPE, REMOVING THE NON-POROUS LAYER BY CUTTING PERPENDICULARLY TO THE CAPILARIES, STABILIZING THE RESULTANT HOMEOPOROUS GEL BY REPLACING THE WATER THEREIN WITH A SYNTHETIC RESIN, AND COATING ALL SURFACES OF THE STABLIZED HOMEOPOROUS GEL WITH AN ELECTRICALLY CONDUCTIVE METAL.
Claim 4
Independent Claim
96 words
A METHOD OF MANUFACTURING A HOMEOPOROUS GAS DIFFUSION ELECTARODE, COMPRISING THE STEPS OF PRODUCING AN IONOTROPIC AQUEOUS GEL OF A POLYELECTROLYTE SELECTED FROM THE GROUP CONSISTING OF ALGINATES, PECTINS AND CARBOXYMETHYL CELLULOSE, SAID GEL CONSISTING OF A NON-POROUS LAYER AND A LAYER DEFINING A MULTIPLICITY OF EVENLY DISTRIBUTED AND PARALLEL CAPILLARIES OF SUBSTANTIALLY THE SAME SIZE AND SHAPE, REMOVING THE NON-POROUS LAYER BY CUTTING PERPENDICULARLY TO THE CAPILARIES, STABILIZING THE RESULTANT HOMEOPOROUS GEL BY REPLACING THE WATER THEREIN WITH A SYNTHETIC RESIN, AND COATING ALL SURFACES OF THE STABLIZED HOMEOPOROUS GEL WITH AN ELECTRICALLY CONDUCTIVE METAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |