US2885379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction composition comprising carbonized elements held in a matrix of uncarbonizedmaterial and method for preparing same
Assignee: Goodyear Tire and Rubber Co
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Filing: 1955-07-15
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Granted: 1959-05-05
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Expires: 1975-07-15
Abstract
No abstract record available.
Inventors
- 👤 Charles W Taylor
- 👤 Matthew E Komp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:31
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/021; F16D69/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
THE METHOD OF MAKING FRICTION MATERIAL FROM A MIXTURE COMPRISING FRICTION IMPARTING FILLER MATERIAL AND A HEAT HARDENABLE CARBONIZABLE BINDER THEREFOR COMPRISING A PHENOL/FORMALDEHYDE RESIN, WHICH METHOD COMPRISES HEATING SAID MIXTURE AT A TEMPERATURE OF ABOUT 650* F, TO ABOUT 800* F. FOR A PERIOD OF TIME SUFFICIENT TO DRIVE OFF VOLATILE MATERIAL AND CARBONIZE THE BINDER, BLENDING 20 TO 80 PARTS OF THE CARBONIZED MATERIAL WITH 80 TO 20 PARTS OF A BINDER COMPOSITION COMPRISING A FRICTION IMPARTING FILLER MATERIAL AND FROM ABOUT 60 TO ABOUT 97 PARTS OF A HEAT HARDENABLE CARBONIZABLE PHENOL/ FORMALDEHYDE RESIN AND FROM ABOUT 40 TO ABOUT 3 PARTS OF A RUBBERY DIENE POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYCHLOROPRENE AND A RUBBERY COPOLYMER OF BUTADIENE-1,3 AND ACRYLONITRILE, AND THEN HEATING THE RESULTING BLEND UNDER PRESSURE OF FROM ABOUT 5,000 TO ABOUT 15,000 POUNDS PER SQUARE INCH AND AT A TEMPERATURE OF FROM ABOUT 275* F. TO ABOUT 400* F. FOR A PERIOD OF TIME SUFFICIENT TO HARDEN SAID BINDER BUT INSUFFICIENT TO CARBONIZE SAID BINDER COMPOSITION.
Claim 2
Independent Claim
174 words
THE METHOD OF MAKING FRICTION MATERIAL FROM A MIXTURE COMPRISING FRICTION IMPARTING FILLER MATERIAL AND A HEAT HARDENABLE CARBONIZABLE BINDER THEREFOR COMPRISING A PHENOL/FORMALDEHYDE RESIN, WHICH METHOD COMPRISES HEATING SAID MIXTURE AT A TEMPERATURE OF ABOUT 650* F, TO ABOUT 800* F. FOR A PERIOD OF TIME SUFFICIENT TO DRIVE OFF VOLATILE MATERIAL AND CARBONIZE THE BINDER, BLENDING 20 TO 80 PARTS OF THE CARBONIZED MATERIAL WITH 80 TO 20 PARTS OF A BINDER COMPOSITION COMPRISING A FRICTION IMPARTING FILLER MATERIAL AND FROM ABOUT 60 TO ABOUT 97 PARTS OF A HEAT HARDENABLE CARBONIZABLE PHENOL/ FORMALDEHYDE RESIN AND FROM ABOUT 40 TO ABOUT 3 PARTS OF A RUBBERY DIENE POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYCHLOROPRENE AND A RUBBERY COPOLYMER OF BUTADIENE-1,3 AND ACRYLONITRILE, AND THEN HEATING THE RESULTING BLEND UNDER PRESSURE OF FROM ABOUT 5,000 TO ABOUT 15,000 POUNDS PER SQUARE INCH AND AT A TEMPERATURE OF FROM ABOUT 275* F. TO ABOUT 400* F. FOR A PERIOD OF TIME SUFFICIENT TO HARDEN SAID BINDER BUT INSUFFICIENT TO CARBONIZE SAID BINDER COMPOSITION.
References Cited (Backward Citations)
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Cited
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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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |