Friction material composites containing crystalline phosphate fibers and a process for the preparation thereof
CA 1283745 C · Owner: Crutchfield, Marvin M. · Inventors: Crutchfield, Marvin M.; Hinkebein, John A.; Griffith, Edward J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Asbestos-free friction material composites containing asbestiform crystalline calcium M phosphate fibers wherein M is a metal cation selected from the group consisting of sodium and lithium and mixtures, thereof, are useful as brake pads brake linings, clutch facings, and the like where friction material composites are needed. Such composites are prepared by (a) blending asbestiform crystalline calcium M phosphate fibers wherein M is a metal cation selected from the group consisting of sodium and lithium and, mixtures thereof, a thermosetting resin-based binder a particulate friction modifier, and a particulate inorganic filler to form a uniform mixture; (b) placing the mixture within a …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted April 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 30, 2008.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.