A method of producing a saponified ethylene-vinyl acetate copolymer resin composition and a laminate and shaped article comprising the composition
CA 2249118 C · Owner: Kunieda, Makoto · Inventors: Kita, Koji; Kunieda, Makoto; Ninomiya, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The saponified ethylene-vinyl acetate copolymer (EVOH) resin composition of the present invention is a composition comprising a saponified ethylene-vinyl acetate copolymer (EVOH) (A) having an ethylene content of 20-60 mole percent and a saponification degree of not less than 90 mole percent, magnesium acetate or/and calcium acetate (B) as an essential component and at least one of acetic acid (C), a boron compound (D) and sodium acetate (E) as an optional component and is, characterized in that the contents of the respective components in said composition, relative to 100 parts by weight of EVOH (A), are as follows: magnesium acetate or/and calcium acetate (B) 0.001-0.02 part by weight on …
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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
- Filed October 1, 1998 and granted February 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 1, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 2020.
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