US2670805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controllable reversible pitch propeller
Assignee: Individual
•
Filing: 1947-03-20
•
Granted: 1954-03-02
•
Expires: 1967-03-20
Abstract
No abstract record available.
Inventors
- 👤 Harry J Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:10
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/02; B63H3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1293884A
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US1936677A
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US1893861A
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US1898697A
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US2007417A
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US2423400A
Cited
US2423191A
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US2405488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |