US2954830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller pitch control mechanism
Assignee: Cooper Bessemer Corp
•
Filing: 1954-05-27
•
Granted: 1960-10-04
•
Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 Hewitt A Gehres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:20
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/06; B63H3/08; B63H3/081; B63H2003/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2308488A
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US2276347A
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US2355039A
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US2456361A
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US2513546A
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US2441838A
Cited
US2536565A
Cited
US2661807A
Cited
US2686569A
Cited
US2745502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |