US3472697A
Expired / Lapsed
US
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High temperature fuel cell
Assignee: Battelle-Institut
•
Filing: 1966-10-04
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Granted: 1969-10-14
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Expires: 1986-10-04
Abstract
No abstract record available.
Inventors
- 👤 Gerd Sandstede
- 👤 Arnold Isenberg
- 👤 Wilfried Pabst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:54
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/10; H01M8/12; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |