Highly heat-resistant resin composition
CA 2021893 A1 · Owner: Polyplastics Co. Ltd. · Inventors: Togami, Masato; Nitoh, Toshikatsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyester composition is resistant to heat and comprises 95 to 99.999 wt.% of a melt-processable polyester being capable of forming the anisotropic phase when it is heated and stressed and 0.001 to 5 wt.% of a phosphorous ester having the formula (1): (1), in which R1, R2 and R3 are, independently of one another, an alkyl, an alkyl having a substituent an, aryl or an aryl having a substituent.
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
- Filed July 24, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2012.
- 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.