US2651491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shuttle valve
Assignee: Electrol Inc
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Filing: 1951-06-12
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Granted: 1953-09-08
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Expires: 1971-06-12
Abstract
No abstract record available.
Inventors
- 👤 Benjamin N Ashton
- 👤 John P Frain
- 👤 Emerson S Rawding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:03
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/56; F15; F15B; F15B13/00; F15B13/02; F15B13/028; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567; Y10T137/2569; Y10T137/7722; Y10T137/7781
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) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |