Laminated polyester film
CA 2082373 A1 · Owner: Ito, Yoshihiko · Inventors: Ito, Yoshihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A polyester film having a coating layer provided with excellent mold release property, slipperiness heat, resistance and flatness is disclosed. The laminated polyester film is prepared by applying at least on one surface of a polyester film an aqueous solution or dispersion containing a polysiloxane-polyvinyl graft copolymer which comprises a silane comprising structural units of the formulas (1) and (2) indicated below or the hydrolysate thereof and in which not less than 80 wt% of the siloxane portions are dimethylsiloxane, and, thereafter, stretching and drying. R1nSiO(4-n) (1) R2mSiO(3-m)2- A - B (2), wherein R1 and R2 are respectively and independently an …
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 November 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 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.