Patent US3447397A successfully refreshed from Google Patents.
US3447397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear transmission driven by torque converter and constant speed clutch
Assignee: Twin Disc Inc
•
Filing: 1967-02-14
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Granted: 1969-06-03
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Expires: 1987-02-14
Abstract
No abstract record available.
Inventors
- 👤 James B Black
- 👤 Samuel Luzaich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:49
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; B; B61; B61C; B61C15/00; B61C9/00; B61C9/08; B61C9/14; B61C9/28; B61C9/34; Y; Y02; Y02T; Y02T30/00; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19149; Y10T74/19153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2297480A
Cited
US2773572A
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US3005529A
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US3202018A
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US3293944A
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US3322247A
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US3329066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |