Polyimide film and process for producing the same
CA 1287938 C · Owner: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha · Inventors: Yonezawa, Kazuya; Takase, Junji; Yamamoto, Tsuneo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein are a new polyimide film which comprises containing therein 30 to 800 ppm of titanium based on the weight of the film, and a process for producing a new polyimide film which comprises introducing a specific titanium-containing substance into the filmforming polyimide resin prior to the casting step. The invention is intended to control the film surface forming process and improve directly the adhesive properties of the film.
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 August 20, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 20, 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.