US3544375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rechargeable fuel cell
Assignee: Individual
•
Filing: 1967-05-22
•
Granted: 1970-12-01
•
Expires: 1987-05-22
Abstract
No abstract record available.
Inventors
- 👤 Samuel Ruben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:09
CPC Classifications
H; H01; H01M; H01M12/00; H01M12/08; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US396342A
Cited
US3218195A
Cited
US2716670A
Cited
GB900451A
Cited
US3042551A
Cited
US3300343A
Cited
US3300344A
Cited
US3317349A
Cited
US3391028A
Cited
US3380856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |