US3717308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding apparatus for fibrous material
Assignee: Individual
•
Filing: 1972-03-06
•
Granted: 1973-02-20
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Expires: 1992-03-06
Abstract
Abstract GRINDING APPARATUS FOR FIBROUS MATERIAL COMPRISING A PAIR OF GRINDING DISCS, AT LEAST ONE OF WHICH IS CARRIED BY AN AXIALLY DISPLACEABLE SHAFT SUPPORTED IN TWO SPACED COMBINED RADIAL AND AXIAL THRUST BEARINGS, EACH BEING ASSOCIATED WITH A SERVOMOTOR FOR PROVIDING THE AXIAL DISPLACEMENT, ONE OF THE SERVOMOTORS BEING OPERATIVE TO AUGMENT THE GRINDING PRESSURE EXERTED ON THE GRINDING DISCS BY THE OTHER SERVOMOTOR AND TO MINIMIZE BEARING PLAY IN A RADIAL DIRECTION.
Inventors
- 👤 R Reinhall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:09
CPC Classifications
B; B02; B02C; B02C7/00; B02C7/02; B02C7/06; F; F16; F16C; F16C41/00; F16C41/02; F16C19/00; F16C19/22; F16C19/30; F16C19/54
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |