Polyimide resin composition
CA 1297615 C · Owner: Yamaya, Norimasa · Inventors: Yamaya, Norimasa; Koga, Nobuhito; Baba, Kenichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is a polyimide resin composition containing 100 parts by weight of polyimide having recurring units of the following general formula (I):, (I), (where Y is a bond divalent hydrocarbon radical having from 1 to 10 carbons, hexafluorinated isopropylidene radical carbonyl radical, thio radical, sulfinyl radical sulfonyl radical or oxide, and R is a, tetra-valent radical of aliphatic radical having at least 2 carbons cycloaliphatic radical, monoaromatic radical condensed polyaromatic, radical, or non-condensed polyaromatic radical wherein aromatic radicals are mutually connected with a bond or a crosslinking function) and from 5 to 100 parts by weight of fibrous reinforcing …
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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 March 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 2009.
- 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.