US2526800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination surge check and release valve for hydraulic press-operating circuits
Assignee: HPM Development Corp
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Filing: 1948-10-28
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Granted: 1950-10-24
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Expires: 1968-10-28
Abstract
No abstract record available.
Inventors
- 👤 Brehm Robert William
- 👤 Warren R Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:36
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; B30B15/18; B30B15/186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |