US2491541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aquaplane
Assignee: Individual
•
Filing: 1947-07-25
•
Granted: 1949-12-20
•
Expires: 1967-07-25
Abstract
No abstract record available.
Inventors
- 👤 Woodin John Cheever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:20
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/28; B63B1/285; B63B1/286
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190300835A
Cited
US800184A
Cited
US920849A
Cited
US1736896A
Cited
US1780998A
Cited
US1858582A
Cited
DE602526C
Cited
DE590270C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |