US2936780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination solenoid valve and pressure switch
Assignee: Guardian Electric Manufacturing Co
•
Filing: 1956-04-02
•
Granted: 1960-05-17
•
Expires: 1976-04-02
Abstract
No abstract record available.
Inventors
- 👤 Elmer J Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:26
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/402; F16K31/404; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/794; Y10T137/8085; Y10T137/8376
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1114398A
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FR441794A
Cited
US1081693A
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US1159518A
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US2309770A
Cited
US2479359A
Cited
US2476927A
Cited
US2661019A
Cited
US2612187A
Cited
US2712324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |