Patent US2558071A successfully refreshed from Google Patents.
US2558071A
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Electrohydraulic control means for machines employing plural hydraulic motors
Assignee: JAMES B CASTLE JR
•
Filing: 1946-05-03
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Granted: 1951-06-26
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Expires: 1966-05-03
Abstract
No abstract record available.
Inventors
- 👤 Jr James B Castle
- 👤 Arthur A Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:21
CPC Classifications
B; B21; B21D; B21D5/00; B21D5/02; B30; B30B; B30B15/00; B30B15/16; B30B15/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1925236A
Cited
US1999834A
Cited
US2148543A
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US2169113A
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US2312213A
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US2343167A
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US2342311A
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US2400685A
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US2359961A
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US2353388A
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US2378497A
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US2353389A
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US2410603A
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US2487402A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |