Patent US2591536A successfully refreshed from Google Patents.
US2964288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves
Assignee: Individual
•
Filing: 1957-04-22
•
Granted: 1960-12-13
•
Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 Holmes Edward William
- 👤 Richards George Willia Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:17
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/04; F16K47/06; F23; F23D; F23D3/00; F23D2900/00; F23D2900/31016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US423896A
Cited
US869878A
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US1754138A
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US1918959A
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US2037994A
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US2038229A
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US2078567A
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US2209442A
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US2485423A
Cited
US2650455A
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US2797701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |