Stretched poly(arylene thioether-ketone) films and production process thereof
CA 1289710 C · Owner: Satake, Yoshikatsu · Inventors: Kouyama, Toshitaka; Satake, Yoshikatsu; Mizuno, Toshiya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein is a stretched poly(arylene thioetherketone) film made of a thermoplastic material which comprises (A) 100 parts by weight of a melt-stable poly(arylene thioether-ketone) having predominant recurring units of the formula , and having a melting point, Tm of 310-380°C a residual melt, crystallization enthalpy .DELTA.Hmc (420°C/10 min) of at least 10 J/g and a melt crystallization temperature Tmc (420°C/10 min), of at least 210°C, and a reduced viscosity of 0.3-2 dl/g as determined by viscosity measurement at 25°C and a polymer concentration of 0.5 g/dl in 98 percent by weight sulfuric acid; and optionally , (B) at least one component selected from up to 100 parts by weight of …
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 October 1, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 1, 2008.
- 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.