US2655169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Autoamtic unloading valve for hydraulic pumps
Assignee: Electraulic Presses Ltd
•
Filing: 1947-07-08
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Granted: 1953-10-13
•
Expires: 1967-07-08
Abstract
No abstract record available.
Inventors
- 👤 Towler John Maurice
- 👤 Towler Frank Hathorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:37
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; B30B15/22; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2622; Y10T137/2625; Y10T137/263; Y10T137/7722; Y10T137/7781
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2051301A
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US2149864A
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US2401845A
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US2421133A
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US2429489A
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US2437480A
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US2474122A
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US2473953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |