Patent US2802453A successfully refreshed from Google Patents.
US2802453A
Expired / Lapsed
US
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Hydraulic transfer valve
Assignee: Lockheed Martin Corp
•
Filing: 1953-08-13
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Granted: 1957-08-13
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Expires: 1973-08-13
Abstract
No abstract record available.
Inventors
- 👤 Dallas S Harp
- 👤 Robert R Richolt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:09
CPC Classifications
B; B64; B64C; B64C13/00; B64C13/24; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567; Y10T137/2569
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2358949A
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US2327210A
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US2312686A
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US2550543A
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US2545509A
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US2641273A
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US2631571A
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US2655111A
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US2635584A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |