Patent US2440046A successfully refreshed from Google Patents.
US2440046A
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Reversible propeller with variable pitch
Assignee: Individual
•
Filing: 1937-11-24
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Granted: 1948-04-20
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Expires: 1957-11-24
Abstract
No abstract record available.
Inventors
- 👤 Hautier Camille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:07
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/02; B64C11/04; B64C11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB136003A
Cited
US1719953A
Cited
US1765091A
Cited
GB343831A
Cited
US1929435A
Cited
US1982284A
Cited
FR772115A
Cited
US2028463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |