Patent US2847086A successfully refreshed from Google Patents.
Patent US2545246A successfully refreshed from Google Patents.
US2545246A
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US
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Main cylinder release and pump bypass valve
Assignee: HPM Development Corp
•
Filing: 1945-10-15
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Granted: 1951-03-13
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Expires: 1965-10-15
Abstract
No abstract record available.
Inventors
- 👤 Warren R Tucker
- 👤 Howard F Macmillin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:42
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; B30B15/18; B30B15/186; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2703; Y10T137/2705
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US853693A
Cited
US894102A
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US1956758A
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US2335809A
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US2366382A
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US2268205A
Cited
US2362864A
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US2316944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |