US2961053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airfoil structure and assembly
Assignee: PREWITT AIRCRAFT Co
•
Filing: 1953-01-07
•
Granted: 1960-11-22
•
Expires: 1973-01-07
Abstract
No abstract record available.
Inventors
- 👤 Richard H Prewitt
- 👤 Jr Thomas H Purcell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:48
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/26; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103; Y10T156/1043; Y10T156/1044
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |