US3561293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control system for automatic transmission
Assignee: Nissan Motor Co Ltd
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Filing: 1968-12-11
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Granted: 1971-02-09
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Expires: 1988-12-11
Abstract
Abstract A HYDRAULIC CONTROL SYSTEM FOR AN AUTOMATIC TRANSMISSION FOR VEHICLES TO ATTAIN PROPER ENGAGEMENT AND DISENGAGEMENT TIMING AT UPSHIFTING, THE SYSTEM PROVIDING A TIMING VALVE MEANS OPERATING AT LOW THROTTLE PRESSURE AND THE EXHAUST THE ENGAGE SIDE CHAMBER OF A SERVO ONLY AT AN INTERMEDIATE PORTION OF DISPLACEMENT OF THE VALVE SPOOL.
Inventors
- 👤 Shojiro Fujita
- 👤 Toshio Miyazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:32
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/04; F16H61/06; F16H61/065; F16H63/00; F16H63/02; F16H63/30; F16H63/3003; F16H2063/3006; F16H61/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |