Biaxially stretched polyparaphenylene sulfide film and process for producing the same
CA 1285733 C · Owner: Mizuno, Toshiya · Inventors: Yasumi, Hideyuki; Mizuno, Toshiya; Matsunaga, Satoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein are a biaxially stretched polyparaphenylene sulfide film having protuberances on the surface of the film in number of not less than 102/mm2 of the surface thereof, an average diameter of the bottom part of the protuberances being from 5 to 40 µm and an average height of the protuberances being from 0.3 to 2 µm and a process for producing the same.
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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 July 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 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.