US3306780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered nickel-carbon gas diffusion electrode for fuel cells
Assignee: VARTA AG
•
Filing: 1960-12-28
•
Granted: 1967-02-28
•
Expires: 1980-12-28
Abstract
No abstract record available.
Inventors
- 👤 Dieberg Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:32
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/8605; H01M4/8626; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A GAS DIFFUSION ELECTRODE COMPRISING ESSENTIALLY A SINTERED POROUS NICKEL MATRIX HAVING UP TO ABOUT 30%, BY VOLUME OF THE ELECTRODE MASS, OF CARBON POWDER OF A GRAIN SIZE OF LESS THAN 60U SINTERED INTO THE MATRIX, SAID CARBON POWDER CARRYING A METAL CATALYST.
Claim 2
Dependent Claim
44 words
A GAS DIFFUSION ELECTRODE COMPRISING ESSENTIALLY A SINTERED POROUS NICKEL MATRIX HAVING UP TO ABOUT 30%, BY VOLUME OF THE ELECTRODE MASS, OF CARBON POWDER OF A GRAIN SIZE OF LESS THAN 60U SINTERED INTO THE MATRIX, SAID CARBON POWDER CARRYING A METAL CATALYST.
References Cited (Backward Citations)
US1988861A
Cited
US2384463A
Cited
US2699458A
Cited
US2969413A
Cited
US2901523A
Cited
US2860175A
Cited
US2945759A
Cited
US2938064A
Cited
US3068157A
Cited
DE1116287B
Cited
US3097974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |