Patent US2570484A successfully refreshed from Google Patents.
US2570484A
Expired / Lapsed
US
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Variable pitch propeller
Assignee: Individual
•
Filing: 1948-04-29
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Granted: 1951-10-09
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Expires: 1968-04-29
Abstract
No abstract record available.
Inventors
- 👤 Paul J Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:19
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/32; B64C11/34; B64C11/343
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1455442A
Cited
US1872337A
Cited
GB496750A
Cited
US2416516A
Cited
US2359265A
Cited
US2423752A
Cited
FR886632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |