US3252839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel platinized electrodes for fuel cells and fuel cells containing the same
Assignee: Wyeth Holdings LLC
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Filing: 1962-08-28
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Granted: 1966-05-24
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Expires: 1982-08-28
Abstract
No abstract record available.
Inventors
- 👤 Stanley H Langer
- 👤 Henry P Landi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:48
CPC Classifications
F; F16; F16N; F16N7/00; F16N7/12; C; C25; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/043; C25B11/051; C25B11/073; C25B11/091; C25B11/095; H; H01; H01M; H01M4/00; H01M4/86; H01M4/96; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
A HYDROGEN-OXYGEN FUEL CELL COMPRISING AN ELECTROLYTE, A PAIR OF ELECTRODES CONTAINING CARBON, A PLATINUM METAL, AND A WATERPROOFING AGENT THEREFOR AND ON WHICH, AFTER WATERPROOFING, A PLATINUM METAL HAS BEEN ELECTRODEPOSITED AS A SECOND CATALYST.
References Cited (Backward Citations)
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Cited
US3098772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |