Patent US3437150A successfully refreshed from Google Patents.
US3437150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable pitch propeller system
Assignee: Individual
•
Filing: 1966-05-31
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Granted: 1969-04-08
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Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 Arne Feroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:31
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/06; B63H3/08; B63H3/081; B63H3/082; B63H2003/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2355039A
Cited
US2786539A
Cited
US2717652A
Cited
US2763329A
Cited
GB768595A
Cited
US3086595A
Cited
US3219121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |