US3477877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel cell
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1962-07-30
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Granted: 1969-11-11
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Expires: 1982-07-30
Abstract
No abstract record available.
Inventors
- 👤 Karl V Kordesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:42
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN A FUEL CELL HAVING A LIQUID ELECTROLYTE AND AT LEAST TWO ELECTRODES IN CONTACT THEREWITH FOR ELECTROCHEMICALLY REACTING A FUEL AND AN OXIDANT, AT LEAST ONE SUCH ELECTRODE COMPRISING A GAS-PERMEABLE ELECTROLYTE-REPELLENT ELECTRODE FOR ESTABLISHING A GAS-ELECTROLYTE-ELECTRODE INTERFACE AND HAVING A LAYER OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF SODIUM CARBOXYMETHYL CELLULOSE, ACETYL CELLULOSE, POLYVINYLALCOHOL, AND MINUTELY POROUS RUBBER OVER SUBSTANTIALLY ALL THE ELECTRODE SURFACE IN CONTACT WITH SAID ELECTROLYTE.
Claim 2
Dependent Claim
72 words
IN A FUEL CELL HAVING A LIQUID ELECTROLYTE AND AT LEAST TWO ELECTRODES IN CONTACT THEREWITH FOR ELECTROCHEMICALLY REACTING A FUEL AND AN OXIDANT, AT LEAST ONE SUCH ELECTRODE COMPRISING A GAS-PERMEABLE ELECTROLYTE-REPELLENT ELECTRODE FOR ESTABLISHING A GAS-ELECTROLYTE-ELECTRODE INTERFACE AND HAVING A LAYER OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF SODIUM CARBOXYMETHYL CELLULOSE, ACETYL CELLULOSE, POLYVINYLALCOHOL, AND MINUTELY POROUS RUBBER OVER SUBSTANTIALLY ALL THE ELECTRODE SURFACE IN CONTACT WITH SAID ELECTROLYTE.
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) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |