Patent US150260A successfully refreshed from Google Patents.
Patent US3147149A successfully refreshed from Google Patents.
US3147149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel cell construction
Assignee: McGraw Edison Co
•
Filing: 1961-02-27
•
Granted: 1964-09-01
•
Expires: 1981-02-27
Abstract
No abstract record available.
Inventors
- 👤 Robert H Postal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:47
CPC Classifications
H; H01; H01M; H01M8/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49115
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE22393C
Cited
CA626768A
Cited
US2384463A
Cited
US2570543A
Cited
US2830109A
Cited
US2581651A
Cited
US2901523A
Cited
US3068311A
Cited
US2901524A
Cited
US2980749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |