Patent US2589072A successfully refreshed from Google Patents.
US2589072A
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US
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Relief valve
Assignee: Phillips Petroleum Co
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Filing: 1948-09-20
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Granted: 1952-03-11
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Expires: 1968-09-20
Abstract
No abstract record available.
Inventors
- 👤 Owen L Garretson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:37
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1804
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1697516A
Cited
US763208A
Cited
GB190412911A
Cited
US964468A
Cited
US2072271A
Cited
US2111430A
Cited
US2200124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |