US2666448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-sealing relief valve
Assignee: Phillips Petroleum Co
•
Filing: 1946-07-29
•
Granted: 1954-01-19
•
Expires: 1966-07-29
Abstract
No abstract record available.
Inventors
- 👤 Owen L Garretson
- 👤 Clarence O Henneman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:52
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1812; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US666245A
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US763208A
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US1157196A
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US1274680A
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US1301278A
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US1613072A
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US1725297A
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US2131928A
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US2107200A
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US2323237A
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US2482198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |