US2475121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airscrew
Assignee: Individual
•
Filing: 1943-10-09
•
Granted: 1949-07-05
•
Expires: 1963-10-09
Abstract
No abstract record available.
Inventors
- 👤 Harold T Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:55
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1526230A
Cited
FR541320A
Cited
GB272578A
Cited
US1611717A
Cited
US1963531A
Cited
US1986709A
Cited
US2030578A
Cited
US2297226A
Cited
US2213497A
Cited
FR851766A
Cited
US2298576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-04 | 1953-01-03 | 1953-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-04 | 1957-01-03 | 1957-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-04 | 1961-01-03 | 1961-07-05 | $7700.00 | Window Closed / Lapsed |