US2935086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot operated valve assembly
Assignee: Individual
•
Filing: 1955-04-18
•
Granted: 1960-05-03
•
Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 Samuel K Lehman
- 👤 Victor B Silber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:00
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/402; F16K31/404; F16K31/02; F16K31/06; F16K31/10; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87338; Y10T137/87507
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2376918A
Cited
US2617444A
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US2569881A
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US2562631A
Cited
US2553940A
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US2486608A
Cited
US2560293A
Cited
US2623534A
Cited
US2677390A
Cited
GB671470A
Cited
US2708092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |