Patent US3446323A successfully refreshed from Google Patents.
US3446323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch plates having means to prevent flutter
Assignee: Twin Disc Inc
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Filing: 1967-06-02
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Granted: 1969-05-27
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Expires: 1987-06-02
Abstract
No abstract record available.
Inventors
- 👤 Conrad R Hilpert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:56
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638; F16D13/00; F16D13/58; F16D13/60; F16D13/64; F16D13/69; F16D2300/00; F16D2300/14; F16D2300/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |