US2823685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine speed control
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1951-06-22
•
Granted: 1958-02-18
•
Expires: 1971-06-22
Abstract
No abstract record available.
Inventors
- 👤 Robert J Anderson
- 👤 Victor W Gennert
- 👤 Lepley Allen Edwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:19
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/141; F01D17/145; F01D17/20; F01D17/22; F01D17/26; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319463A
Cited
US1464749A
Cited
US1741489A
Cited
US2197171A
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US936261A
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GB191127022A
Cited
US1063547A
Cited
US1063548A
Cited
US1411412A
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US1516011A
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US1995885A
Cited
US1910322A
Cited
US2020847A
Cited
US2208539A
Cited
US2230914A
Cited
US2237780A
Cited
US2219359A
Cited
US2364817A
Cited
US2332910A
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US2342763A
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US2365650A
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US2485514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |