US3595698A
Expired / Lapsed
US
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Hydrazine fuel cell with acrylic acid polymer membrane
Assignee: Union Carbide Corp
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Filing: 1968-10-03
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Granted: 1971-07-27
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Expires: 1988-10-03
Abstract
Abstract ALKALI METAL SALTS OF ETHYLENE-ACRYLIC ACID COPOLYMERS ARE USEFUL AS SELECTIVE, ION PERMEABLE MEMBRANES FOR PERMEABLE MEMBRANES FOR HYDRAZINE-AIR FUEL CELLS AND PERMIT OPERATION OF THE CELL AT HIGH FUEL CONCENTRATIONS.
Inventors
- 👤 Karl Victor Kordesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:05
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/42; H01M50/489; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |