US3057940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoelectric generator
Assignee: 3M Co
•
Filing: 1960-06-17
•
Granted: 1962-10-09
•
Expires: 1980-06-17
Abstract
No abstract record available.
Inventors
- 👤 Robert W Fritts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:49
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/80; H10N10/81; H10N10/813
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE242847C
Cited
US1848655A
Cited
US2543331A
Cited
US2886618A
Cited
US2919553A
Cited
US2949497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |