Patent US2272128A successfully refreshed from Google Patents.
US2272128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine propeller
Assignee: Individual
•
Filing: 1940-11-28
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Granted: 1942-02-03
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Expires: 1960-11-28
Abstract
No abstract record available.
Inventors
- 👤 Osbourne Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:07
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/20; B63B; B63B3/00; B63B3/14; B63B3/42; B63H23/00; B63H23/32; B63H23/34; B63H2023/346
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) | 1945-02-02 | 1945-08-04 | 1946-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-02-02 | 1949-08-04 | 1950-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-02-02 | 1953-08-04 | 1954-02-03 | $7700.00 | Window Closed / Lapsed |