Patent US3738901A successfully refreshed from Google Patents.
US3738901A
Expired / Lapsed
US
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Clutch disk and method of making
Assignee: Individual
•
Filing: 1971-03-29
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Granted: 1973-06-12
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Expires: 1991-03-29
Abstract
Abstract A CLUTCH DISK INCLUDING A POROUS FELTLIKE SHEET OF ORGANIC FIBERS, ACTIVATED CARBON MADE FROM COCONUT SHELLS, AND RESOL-TYPE PHENOLIC RESIN BONDED TO A CORE PLATE BY COMOLDING UNDER HEAT AND PRESSURE, AND A METHOD OF MANUFACTURE OF THE SAME.
Inventors
- 👤 H Matsushima
- 👤 T Iio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:14
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; F16D69/026; F16D2200/00; F16D2200/0082; F16D2200/0091; F16D2200/0095; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T442/00; Y10T442/20; Y10T442/2861
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |