US4187209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake block material
Assignee: Carlisle Corp
•
Filing: 1978-11-06
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Granted: 1980-02-05
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Expires: 1998-11-06
Abstract
Abstract Low abrasion, heat resistant, high strength friction material with a high resistance to wear is described as containing phenolic resin, an organic modifier, processed mineral fibers and a filler. Rubber, either natural or synthetic, graphite, a metallic oxide, a color pigment, and factice may also be present. The material finds particular use in friction materials for brake blocks, drum brake linings 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
2026-10-29 17:04
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C04; C04B; C04B26/00; C04B26/02; C04B26/10; C04B26/12; C04B26/122; F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; F16D69/026
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
27 words
An improved heat and wear resistant friction material comprising in approximate percent by weight: Spun blast furnace slag fibers: 20%-75% Phenolic Resin and Modifier: 13%-33% Barytes: 10%-35%.
Claim 2
Dependent Claim
27 words
An improved heat and wear resistant friction material comprising in approximate percent by weight: Spun blast furnace slag fibers: 20%-75% Phenolic Resin and Modifier: 13%-33% Barytes: 10%-35%.
Claim 3
Dependent Claim
16 words
The improved heat and wear resistant friction material of claim 1 wherein said modifier is organic.
Claim 4
Dependent Claim
17 words
The improved heat and wear resistant friction material of claim 1 wherein said modifier is GRS polymer.
Claim 5
Dependent Claim
25 words
The improved heat and wear resistant friction material of claim 1 and wherein rubber in approximate percent by weight between 3% to 9% is included.
Claim 6
Dependent Claim
35 words
An improved heat and wear resistant friction material comprising in approximate percent by weight: Spun blast furnace slag fibers: 20%-75% Phenolic Resin and modifier: 13%-33% Barytes: 10%-35% Graphite: 3%-8% Carbon Black: 1%-4% Metallic oxide: 2%-6%.
Claim 7
Dependent Claim
35 words
An improved heat and wear resistant friction material comprising in approximate percent by weight: Spun blast furnace slag fibers: 20%-75% Phenolic Resin and modifier: 13%-33% Barytes: 10%-35% Graphite: 3%-8% Carbon Black: 1%-4% Metallic oxide: 2%-6%.
Claim 8
Dependent Claim
27 words
An improved heat and wear resistant friction material comprising in approximate percent by weight: Spun blast furnace Slag fibers: 75% Phenolic resin and modifier: 15% Barytes: 10%.
Claim 9
Dependent Claim
27 words
An improved heat and wear resistant friction material comprising in approximate percent by weight: Spun blast furnace Slag fibers: 75% Phenolic resin and modifier: 15% Barytes: 10%.
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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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |