US2887976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hovering apparatus for submarines and other buoyant objects
Assignee: Individual
•
Filing: 1953-10-13
•
Granted: 1959-05-26
•
Expires: 1973-10-13
Abstract
No abstract record available.
Inventors
- 👤 Clinton R Hanna
- 👤 William O Osbon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:23
CPC Classifications
F; F16; F16K; F16K31/00; B; B63; B63G; B63G8/00; B63G8/14; B63G8/22; G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/2066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE322471C
Cited
US1373329A
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US1481230A
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US2130929A
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US2263553A
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US2302014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |