US2231750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller blade
Assignee: Wyman Gordon Co
•
Filing: 1938-06-23
•
Granted: 1941-02-11
•
Expires: 1958-06-23
Abstract
No abstract record available.
Inventors
- 👤 Mark H Damerell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:34
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/16; B64C11/20; B64C11/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49332; Y10T29/49334
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-02-11 | 1944-08-12 | 1945-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-11 | 1948-08-12 | 1949-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-11 | 1952-08-12 | 1953-02-11 | $7700.00 | Window Closed / Lapsed |