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Patent US2641278A successfully refreshed from Google Patents.
US2641278A
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Pressure relief valve
Assignee: Manning Maxwell and Moore Inc
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Filing: 1946-08-19
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Granted: 1953-06-09
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Expires: 1966-08-19
Abstract
No abstract record available.
Inventors
- 👤 Albert D Eplett
- 👤 Frank H Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:31
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0433; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7932
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1152733A
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US1715353A
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US1800185A
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US1775091A
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US2003840A
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US2252554A
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US2268119A
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US2346938A
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US2370245A
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US2520092A
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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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |