Expired Canadian patentCanada
Flake- or sliver-like porous structure of polymeric material and process of producing same, and process of producing sheet-like structure therefrom
CA 995849 A · Owner: Mitsubishi Rayon Company Ltd. · Inventors: Uotani, Takeshi; Miyanoki, Masahiko; Yoshihara, Toshio
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 24, 1976. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 24, 1993.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedAugust 24, 1976
Term endedAugust 24, 1993
Patent numberCA 995849 A
Classification (IPC)D01D5/11 +2 more
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.