Patent US4586137A successfully refreshed from Google Patents.
Patent US2516508A successfully refreshed from Google Patents.
US2516508A
Expired / Lapsed
US
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Hydraulic system and valve therefor
Assignee: Curtiss Wright Corp
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Filing: 1946-12-26
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Granted: 1950-07-25
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Expires: 1966-12-26
Abstract
No abstract record available.
Inventors
- 👤 Verne P Donner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:13
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/055; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |