US3439770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant speed drive control system for automobiles
Assignee: Individual
•
Filing: 1967-03-23
•
Granted: 1969-04-22
•
Expires: 1987-03-23
Abstract
No abstract record available.
Inventors
- 👤 Hikotaro Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:17
CPC Classifications
H; H02; H02P; H02P29/00; H02P29/0016; H02P29/0027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2637014A
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US2236145A
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US2971596A
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US3060602A
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US3133610A
Cited
US3116807A
Cited
US3195671A
Cited
US3368639A
Cited
US3344880A
Cited
US3381771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |