US2789577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Life raft valve
Assignee: Individual
•
Filing: 1953-07-17
•
Granted: 1957-04-23
•
Expires: 1973-07-17
Abstract
No abstract record available.
Inventors
- 👤 Oakley W Hosking
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:34
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/24; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/7722; Y10T137/7837; Y10T137/7879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US505486A
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US637919A
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US670725A
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US1758625A
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US1896708A
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US2229379A
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GB420346A
Cited
US2475851A
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US2679857A
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US2677388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |