US3511715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for direct conversion of thermal energy to electrical energy
Assignee: Valley Co Inc
•
Filing: 1966-01-07
•
Granted: 1970-05-12
•
Expires: 1986-01-07
Abstract
No abstract record available.
Inventors
- 👤 John C Angus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:12
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/18; H01M8/182; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA685755A
Cited
US2901524A
Cited
US2890259A
Cited
US3294585A
Cited
US3293079A
Cited
US3400054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |