US2498348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine propeller
Assignee: Individual
•
Filing: 1947-05-29
•
Granted: 1950-02-21
•
Expires: 1967-05-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank E Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:17
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1308527A
Cited
US1419061A
Cited
US1384308A
Cited
US1419180A
Cited
US2077959A
Cited
US2183891A
Cited
US2251887A
Cited
US2473665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |