Patent US2350345A successfully refreshed from Google Patents.
US2350345A
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Propeller
Assignee: FREEDMAN BURNHAM ENGINEERING C
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Filing: 1939-03-27
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Granted: 1944-06-06
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Expires: 1959-03-27
Abstract
No abstract record available.
Inventors
- 👤 Gordon L Freedman
- 👤 Walter E Burnham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:59
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/02; B64C11/04; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039; Y10T156/1052; Y10T156/1062; Y10T156/1064; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49332; Y10T29/49826; Y10T29/49906; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49925; Y10T29/49927; Y10T29/49929
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) | 1947-06-06 | 1947-12-06 | 1948-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-06-06 | 1951-12-06 | 1952-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-06-06 | 1955-12-06 | 1956-06-06 | $7700.00 | Window Closed / Lapsed |