US2475293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft rotor drive
Assignee: Boeing Co
•
Filing: 1944-09-18
•
Granted: 1949-07-05
•
Expires: 1964-09-18
Abstract
No abstract record available.
Inventors
- 👤 Horace T Pentecost
- 👤 Albert W Bliler
- 👤 Jr Waine Archer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:53
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1919089A
Cited
FR790931A
Cited
GB450586A
Cited
US2162794A
Cited
US2163893A
Cited
US2206291A
Cited
US2261337A
Cited
US2264943A
Cited
US2376523A
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 |