Patent US3360475A successfully refreshed from Google Patents.
US3360475A
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Magnetic friction packings
Assignee: Compagnie des Machines Bull SA
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Filing: 1964-03-31
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Granted: 1967-12-26
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Expires: 1984-03-31
Abstract
No abstract record available.
Inventors
- 👤 Rossez Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:48
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1009; F; F16; F16D; F16D63/00; F16D63/002; F16D69/00; F16D69/02; C09K2200/00; C09K2200/02; C09K2200/0204; C09K2200/0213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A DRY SOLID MATERIAL INTENDED TO FORM A FRICTION LINING CAPABLE OF BEING SUBJECTED TO A MAGNETIC FIELD FOR MAGNETIC CLUTCHES, MAGNETIC BRAKES OR LIKE DEVICES OBTAINED FROM A COMPRESSED AND THERMALLY SINTERED MIXTURE OF POWDERS, THE SAID MIXTURE CONSISTING BEFORE SINTERING ESSENTIALLY OF 49-55% BY VOLUME OF POLYTERTRAFLUOROETHYLENE POWDER AND 41-45% BY VOLUME OF CHROMISED IRON POWDER, THE LATTER BEING COMPOSED OF PARTICLES OF IRREGULAR FORM AND CONTAINING AT MOST 12% BY WEIGHT OF CHROMIUM.
Claim 2
Dependent Claim
76 words
A DRY SOLID MATERIAL INTENDED TO FORM A FRICTION LINING CAPABLE OF BEING SUBJECTED TO A MAGNETIC FIELD FOR MAGNETIC CLUTCHES, MAGNETIC BRAKES OR LIKE DEVICES OBTAINED FROM A COMPRESSED AND THERMALLY SINTERED MIXTURE OF POWDERS, THE SAID MIXTURE CONSISTING BEFORE SINTERING ESSENTIALLY OF 49-55% BY VOLUME OF POLYTERTRAFLUOROETHYLENE POWDER AND 41-45% BY VOLUME OF CHROMISED IRON POWDER, THE LATTER BEING COMPOSED OF PARTICLES OF IRREGULAR FORM AND CONTAINING AT MOST 12% BY WEIGHT OF CHROMIUM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |