US2648386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter transmission mechanism
Assignee: HARRIS S CAMPBELL
•
Filing: 1948-03-29
•
Granted: 1953-08-11
•
Expires: 1968-03-29
Abstract
No abstract record available.
Inventors
- 👤 Gage W Tidd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:11
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/82; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1842798A
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US2023018A
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US2262747A
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US2269916A
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US2397941A
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US2402725A
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US2370131A
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US2384996A
Cited
US2495988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |