Patent US3049448A successfully refreshed from Google Patents.
US3049448A
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Method for improving the frictional properties of carbon brushes by low pressure polyethylene impregnation
Assignee: Mersen SA
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Filing: 1959-03-10
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Granted: 1962-08-14
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Expires: 1979-03-10
Abstract
No abstract record available.
Inventors
- 👤 Millet Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:30
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/48; C04B41/4857; C04B41/4861; C04B41/80; C04B41/81; C04B41/82; C04B41/83; H; H01; H01B; H01B1/00; H01B1/04; H01R; H01R43/00; H01R43/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
IN A METHOD FOR IMPROVING THE FRICTION PROPERTIES OF ABSORBENT CARBON BRUSHES FOR ELECTRICAL MACHINES BY IMPREGNATING A BRUSH WITH A POLYMERIC SUBSTANCE, THE IMPROVEMENT WHICH CONSISTS IN USING LOW PRESSURE POLYETHYLENE AS THE IMPREGNATING POLYMERIC SUBSTANCE.
Claim 2
Dependent Claim
37 words
IN A METHOD FOR IMPROVING THE FRICTION PROPERTIES OF ABSORBENT CARBON BRUSHES FOR ELECTRICAL MACHINES BY IMPREGNATING A BRUSH WITH A POLYMERIC SUBSTANCE, THE IMPROVEMENT WHICH CONSISTS IN USING LOW PRESSURE POLYETHYLENE AS THE IMPREGNATING POLYMERIC SUBSTANCE.
References Cited (Backward Citations)
US2384848A
Cited
GB721211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |