Patent US2952151A successfully refreshed from Google Patents.
US2952151A
Expired / Lapsed
US
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Safety device for use in testing relief valves on pressurized fluid containers
Assignee: Phillips Petroleum Co
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Filing: 1955-05-16
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Granted: 1960-09-13
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Expires: 1975-05-16
Abstract
No abstract record available.
Inventors
- 👤 Howard E Simonson
- 👤 Edwin E Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:43
CPC Classifications
F; F16; F16K; F16K17/00; G; G01; G01M; G01M3/00; G01M3/02; G01M3/26; G01M3/28; G01M3/2876
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1172833A
Cited
US1144758A
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US1637743A
Cited
US2178901A
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US2129763A
Cited
US2419293A
Cited
US2637197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |