US2584638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unloading valve mechanism for fluid pressure pumps
Assignee: Individual
•
Filing: 1946-02-21
•
Granted: 1952-02-05
•
Expires: 1966-02-21
Abstract
No abstract record available.
Inventors
- 👤 Edwin G Staude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:14
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; F04C14/26; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2622; Y10T137/2625
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US703220A
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US976917A
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US1532326A
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US2241665A
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US2264375A
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US2279176A
Cited
US2316445A
Cited
US2347238A
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US2375411A
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US2437480A
Cited
US2420394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |