US2759699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-back flow motor valve
Assignee: Phillips Petroleum Co
•
Filing: 1951-12-26
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Granted: 1956-08-21
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Expires: 1971-12-26
Abstract
No abstract record available.
Inventors
- 👤 Elton E Rush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:19
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US589124A
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US737706A
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US986184A
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US1087399A
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US1980063A
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US2169452A
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US2329001A
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US2361225A
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US2569554A
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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) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |