Heat-resistant stretched film and production process thereof
CA 1323480 C · Owner: Katto, Takayuki · Inventors: Teramoto, Yoshikichi; Mizuno, Toshiya; Satake, Yoshikatsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat-resistant stretched film is obtained by stretching a resin composition comprising 100 parts by weight of a poly(arylene sulfide) of a substantially linear structure and 5 to less than 100 parts by weight of a melt-stable poly(arylene thioether-ketone). The poly(arylene sulfide) has a melt viscosity of at least 1,000 poises as measured at 310°C and a shear rate of 200 sec-1. The poly(arylene thioether-ketone) has predominant recurring units of the formula , wherein the -CO- and -S- groups, are bonded in the para position to each other through the benzene ring, and has the following physical properties (a)-(c):, (a) a melting point Tm being 310-380°C;, (b) a melt crystallization …
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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 October 26, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 26, 2010.
- 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.