Dense, flexible composite material
CA 1111726 A · Owner: Toray Industries, Inc. · Inventors: Tanaka, Minoru; Mizuguchi, Shunji; Yagi, Kenkichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite material comprising a fibrous sheet which is impregnated with a polyurethane elastomer. The polyurethane elastomer comprises the reaction product of, (A) a polymeric diol having a molecular weight of from about 800 to about 4000;, (B) an organic diisocyanate having the formula (I) (I), wherein R1 and R2 are hydrogen or an alkyl group having 1 to 5 carbon atoms respectively, and, (C) a chain extender comprising an organic diamine having the formula (II), (II), wherein R1 and R2 are hydrogen or an alkyl group having 1-5 carbon atoms respectively, and a phthalic acid dihydrazide having the formula (III) (III), This composite sheet material is useful as a synthetic leather …
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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 November 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 1998.
- 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.