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US2497780A
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Reducing thermal shock high-temperature valve
Assignee: Phillips Petroleum Co
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Filing: 1945-04-27
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Granted: 1950-02-14
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Expires: 1965-04-27
Abstract
No abstract record available.
Inventors
- 👤 Shelby D Lawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:27
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/04; F16K27/044; F16K27/047; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US951342A
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US1006640A
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US1213259A
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US1746132A
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US1995727A
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US2062781A
Cited
US2217643A
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US2338452A
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US2352799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |