Polyester composition and biaxially oriented polyester film containing the same
CA 2103557 A1 · Owner: Yoshida, Minoru · Inventors: Aoyama, Masatoshi; Sakamoto, Jun; Yoshida, Minoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermoplastic polyester composition suitable for producing films or fibers excellent in wear resistance and a biaxially, oriented polyester film made therefrom. The composition comprises (A) a thermoplastic polyester and (B) monoclinic and/or tetragonal zirconium oxide particles.
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
- Filed December 9, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 9, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 2014.
- 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.