Patent US2893204A successfully refreshed from Google Patents.
US2893204A
Expired / Lapsed
US
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Self-cooled turbine drive
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1956-09-11
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Granted: 1959-07-07
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Expires: 1976-09-11
Abstract
No abstract record available.
Inventors
- 👤 Robert J Anderson
- 👤 Joseph T Hamrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:47
CPC Classifications
F; F01; F01D; F01D15/00; F01D15/10; F02; F02C; F02C7/00; F02C7/12; F02C7/16; F02C7/18; F02C7/185; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2477637A
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US2582848A
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US2612020A
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US2508397A
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US2696712A
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US2678542A
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US2691274A
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US2767561A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |