US3451641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoelectric conversion system
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1967-02-14
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Granted: 1969-06-24
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Expires: 1987-02-14
Abstract
No abstract record available.
Inventors
- 👤 Elias L Leventhal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:38
CPC Classifications
G; G21; G21D; G21D7/00; G21D7/04; F; F28; F28D; F28D15/00; F28D15/02; F28D15/0275; F28D15/04; G21C; G21C15/00; G21C15/24; G21C15/257; G21H; G21H1/00; G21H1/10; G21H1/103; H; H10; H10N; H10N10/00; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |