Molded article of crystalline thermoplastic resin with high gas barrier property and production thereof
CA 2064862 C · Owner: Ishida, Takashi · Inventors: Ishida, Takashi; Takahashi, Tomonori; Kimura, Masato,
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In one aspect of the invention, there is provided a molded article of crystalline thermoplastic resin with high gas barrier property of which the resin has crystalline and non-crystalline regions, the enhancing effect on gas barrier property of uniaxial-uniplanar orientation of the crystal axis direction of crystallites of said crystalline regions being used and the crystallites orientation being optimized by specific conditions. In another aspect of the invention there is provided a, molded article of crystalline thermoplastic resin with remarkably high gas barrier property by use of the synergistic enhancing effect on gas barrier property of the uniaxial-uniplanar orientation of …
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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 June 14, 1991 and granted May 19, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 14, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2013.
- 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
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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.