Patent US2967597A successfully refreshed from Google Patents.
US2967597A
Expired / Lapsed
US
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Smoothly operating centrifugal clutch
Assignee: ZF Friedrichshafen AG
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Filing: 1957-07-08
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Granted: 1961-01-10
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Expires: 1977-07-08
Abstract
No abstract record available.
Inventors
- 👤 Binder Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:03
CPC Classifications
F; F16; F16D; F16D43/00; F16D43/02; F16D43/04; F16D43/14; F16D43/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR365068A
Cited
US1683954A
Cited
DE552134C
Cited
DE615125C
Cited
US2016643A
Cited
DE630753C
Cited
US1981167A
Cited
FR1075696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |