US4218361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction material
Assignee: Carlisle Corp
•
Filing: 1979-03-14
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Granted: 1980-08-19
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Expires: 1999-03-14
Abstract
Abstract A heat resistant low abrasion high strength friction material with a high resistance to wear is described as containing asbestos fibers, phenolic resin, spun blast furnace slag fibers, rubber particles, a filler and ferrous or non-ferrous particles. The friction material finds particular use in the formation of brake blocks, drum brake lining and disc pads for vehicle braking systems and the like.
Inventors
- 👤 William H. Searfoss
- 👤 Gerald P. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:06
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/021; F16D69/022; C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
34 words
An improved heat and wear resistant friction material comprising in approximate percent by weight; asbestos fibers 20%-60%, phenolic resin 15%-33%, spun blast furnace slag fibers 1%-15%, rubber particles 3%-9%, fillers 10%-35%, metallic oxide 2%-12%.
Claim 2
Dependent Claim
34 words
An improved heat and wear resistant friction material comprising in approximate percent by weight; asbestos fibers 20%-60%, phenolic resin 15%-33%, spun blast furnace slag fibers 1%-15%, rubber particles 3%-9%, fillers 10%-35%, metallic oxide 2%-12%.
Claim 3
Dependent Claim
21 words
The improved heat and wear resistant friction material of claim 1 and wherein a modifier is included with the phenolic resin.
Claim 4
Dependent Claim
17 words
The improved heat and wear resistant friction material of claim 2 and wherein said modifier is organic.
Claim 5
Dependent Claim
18 words
The improved heat and wear resistant friction material of claim 2 and wherein said modifier is GRS polymer.
Claim 6
Dependent Claim
21 words
The improved heat and wear resistant friction material of claim 1 and wherein said metallic oxide is ferrous and non-ferrous particles.
Claim 7
Dependent Claim
34 words
An improved heat and wear resistant friction material comprising in approximate percent by weight; asbestos fibers 40%, phenolic resin 20%, spun blast furnace slag fibers 10%, rubber particles 5%, fillers 15%, metallic oxide 10%.
Claim 8
Dependent Claim
34 words
An improved heat and wear resistant friction material comprising in approximate percent by weight; asbestos fibers 40%, phenolic resin 20%, spun blast furnace slag fibers 10%, rubber particles 5%, fillers 15%, metallic oxide 10%.
Claim 9
Dependent Claim
31 words
An improved heat and wear resistant friction material comprising in approximate percent by weight; asbestos fibers 60%, phenolic resin 22%, spun blast furnace slag fibers 4%, rubber particles 4%, fillers 10%.
Claim 10
Dependent Claim
31 words
An improved heat and wear resistant friction material comprising in approximate percent by weight; asbestos fibers 60%, phenolic resin 22%, spun blast furnace slag fibers 4%, rubber particles 4%, fillers 10%.
Claim 11
Dependent Claim
34 words
An improved heat and wear resistant friction material comprising in approximate percent by weight; asbestos fibers 30%, phenolic resin 15%, spun blast furnace slag fibers 15%, rubber particles 8%, fillers 20%, metallic particles 12%.
Claim 12
Dependent Claim
34 words
An improved heat and wear resistant friction material comprising in approximate percent by weight; asbestos fibers 30%, phenolic resin 15%, spun blast furnace slag fibers 15%, rubber particles 8%, fillers 20%, metallic particles 12%.
Claim 13
Dependent Claim
25 words
The improved heat and wear resistant friction material of claim 1 and wherein cashew nut shell oil particles in amounts by weight 1%-10% are present.
Claim 14
Dependent Claim
24 words
The improved heat and wear resistant friction material of claim 1 and wherein cashew nut shell oil in amounts by weight 1%-10% are present.
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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) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |