Polyimide
CA 1295776 C · Owner: Oikawa, Hideaki · Inventors: Yamaguchi, Akihiro; Koga, Nobuhito; Iiyama, Katsuaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyimide of this invention is almost colorless and has remarkably high light transmittance as well as excellent processability and adhesive properties at high temperatures in addition to its substantial high-temperature stability. The polyimide is a novel polyimide capable of being used for space and aeronautical materials, electric and electronic members automotive parts, and furthermore for high-temperature adhesives. The polyimide has recurring units of the following formula (I):, (1), wherein X is a radical selected from the group consisting of a bond divalent hydrocarbon radical having from 1 to 10 carbons hexafluorinated isopropylidene radical carbonyl radical, sulfonyl, radical and …
Read the whole patent
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 February 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 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.