US2563731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Land, sea, and air plane
Assignee: Individual
•
Filing: 1945-04-17
•
Granted: 1951-08-07
•
Expires: 1965-04-17
Abstract
No abstract record available.
Inventors
- 👤 Wilbur L Masterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:05
CPC Classifications
B; B64; B64C; B64C37/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1286679A
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US1527666A
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US1579656A
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US2008843A
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US2068774A
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US2162066A
Cited
US2263365A
Cited
US2377457A
Cited
US2429975A
Cited
US2367230A
Cited
US2424769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |