Method and an apparatus for manufacturing an article of a composite material, an article, disc brake, a commutator and a commutator brush made by the method
CA 2091334 A1 · Owner: Obtec A/S · Inventors: Thomas, David Morgan; Lindgaard, Torben
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of fabricating articles of manufacture of a composite material by curing a curable matrix-forming binder in a compound material under simultaneous application of pressure and ultrasonic energy; an apparatus to be used in carrying out the method and, articles of manufacture fabricated according to the method. Articles according to the invention are useful in a multitude of applications, particularly in applications where the article must retain its shape and properties when subjected to temperatures above the melting point of usual thermoplastic materials e.g. above, 1000 ·C. The method provides dense thermally stable, and coherent, articles of manufacture of composite materials …
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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
- Filed September 13, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.