US2893204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cooled turbine drive
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1956-09-11
•
Granted: 1959-07-07
•
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 19:43
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US515585A
Cited
US2391838A
Cited
US1440000A
Cited
US2352793A
Cited
US2477637A
Cited
US2582848A
Cited
US2612020A
Cited
US2508397A
Cited
US2696712A
Cited
US2678542A
Cited
US2691274A
Cited
US2767561A
Cited
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 |