Patent US2835332A successfully refreshed from Google Patents.
US2835332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power drive suitable for airplanes and helicopters
Assignee: Individual
•
Filing: 1955-10-20
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Granted: 1958-05-20
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Expires: 1975-10-20
Abstract
No abstract record available.
Inventors
- 👤 Vern K Fry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:25
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/12; B64C27/16; B64C27/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US759051A
Cited
US1368808A
Cited
US2281203A
Cited
US2397998A
Cited
GB586554A
Cited
US2425904A
Cited
US2548975A
Cited
US2626501A
Cited
US2541098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |