US3168487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction composition of a rubber, cashew nut shell resin and lead sulphide
Assignee: American Brake Shoe Co
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Filing: 1959-11-20
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Granted: 1965-02-02
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Expires: 1979-11-20
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Spokes
- 👤 Emil C Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:17
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/04; F16D65/06; F16D65/062; F16D69/00; F16D69/02; F16D69/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A COMPOSITION BRAKE SHOE COMPRISING A SHOE BODY COMPOSED OF A BINDER MATRIX COMPRISING ESSENTIALLY A RUBBERY POLYMER OF CONJUGATED DIENE AND CASHEW THERMOSETTIN RESIN AND IN WHICH THE RESIN PREDOMINATES PROPORTIONALLY OVER RUBBER, AND SAID SHOE BODY INCLUDING DISPERSED THROUGHOUT THE BINDER MATRIX THEREOF INDIVIDUAL FILLER BODIES COMPOSED OF FINELY DIVIDED PARTICLES OF LEAD SULPHIDE BONDED TOGETHER AND AGGLOMERATED BY A BINDER OF A RUBBERY POLYMER OF CONJUGATED DIENE AND THERMOSETTING CASHEW RESIN AND IN WHICH THE RESIN PREDOMINATES PROPORTIONALLY OVER RUBBER, BEFORE SAID FILLER BODIES ARE DISPERSED THROUGHOUT THE BINDER MATRIX, SAID FILLER BODIES BEING PRESENT IN AN AMOUNT OF ABOUT SIX TO TWELVE PERCENT BY WEIGHT OF THE SHOE.
Claim 2
Dependent Claim
112 words
A COMPOSITION BRAKE SHOE COMPRISING A SHOE BODY COMPOSED OF A BINDER MATRIX COMPRISING ESSENTIALLY A RUBBERY POLYMER OF CONJUGATED DIENE AND CASHEW THERMOSETTIN RESIN AND IN WHICH THE RESIN PREDOMINATES PROPORTIONALLY OVER RUBBER, AND SAID SHOE BODY INCLUDING DISPERSED THROUGHOUT THE BINDER MATRIX THEREOF INDIVIDUAL FILLER BODIES COMPOSED OF FINELY DIVIDED PARTICLES OF LEAD SULPHIDE BONDED TOGETHER AND AGGLOMERATED BY A BINDER OF A RUBBERY POLYMER OF CONJUGATED DIENE AND THERMOSETTING CASHEW RESIN AND IN WHICH THE RESIN PREDOMINATES PROPORTIONALLY OVER RUBBER, BEFORE SAID FILLER BODIES ARE DISPERSED THROUGHOUT THE BINDER MATRIX, SAID FILLER BODIES BEING PRESENT IN AN AMOUNT OF ABOUT SIX TO TWELVE PERCENT BY WEIGHT OF THE SHOE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |