US3485676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel cell including fire-glazed ceramic walls and ceramic electrolyte impregnated partition
Assignee: JAMES E HODGSON
•
Filing: 1966-12-27
•
Granted: 1969-12-23
•
Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 James E Hodgson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:51
CPC Classifications
H; H01; H01M; H01M8/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2980749A
Cited
US3146131A
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US3288646A
Cited
US3300344A
Cited
US3321333A
Cited
US3150657A
Cited
US3367801A
Cited
US3382105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |