US2757516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic vapor-liquid selector valve
Assignee: Phillips Petroleum Co
•
Filing: 1951-12-26
•
Granted: 1956-08-07
•
Expires: 1971-12-26
Abstract
No abstract record available.
Inventors
- 👤 Doyle D Buttolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:29
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/07; F02; F02M; F02M21/00; F02B; F02B43/00; F02M2700/00; F02M2700/12; F02M2700/126; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567; Y10T137/7722; Y10T137/7723; Y10T137/7731
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1312644A
Cited
US1015596A
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US1219516A
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US1688092A
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US2158458A
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US2226810A
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US2261080A
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US2409611A
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US2285905A
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US2402355A
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US2401651A
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US2406540A
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US2456890A
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US2536322A
Cited
US2532710A
Cited
US2598351A
Cited
US2677937A
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US2645906A
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US2632430A
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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) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |