US2680401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple-circuit hydraulic control with optional separate or parallel operation
Assignee: Deere Manufacturing Co
•
Filing: 1952-02-13
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Granted: 1954-06-08
•
Expires: 1972-02-13
Abstract
No abstract record available.
Inventors
- 👤 Raymond H Heller
- 👤 Stanley D Liedtke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:50
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/02; A01B63/10; A01B63/1006; A01B63/14; A01B63/24; A01B63/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US718973A
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US988813A
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US1999834A
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US2148543A
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US2343912A
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US2266921A
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US2363292A
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US2383689A
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US2477710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |