Polyvinylidene fluoride or vinylidene fluoride copolymer compositions
CA 1062841 A · Owner: Kureha Kagaku Kogyo Kabushiki Kaisha · Inventors: Suzuki, Fujio; Kidoh, Kunizoh; Kudo, Yoshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, The invention is a composition of polyvinylidene fluoride (or a vinylidene fluoride copolymer) and a certain copolymer material, the copolymer material being present in the composition in an amount of 1-50% by weight. The copolymer material is a copolymer of vinyl fluoride and at least one alkyl acrylate or alkyl methacrylate (the alkyl groups of which contain 1 to 4 carbon atoms). The composition retains good light-transmitting properties even when used in molding or shaping, which is not true of polyvinylidene fluoride (or vinylidene fluoride copolymer) alone, but on the other hand the advantageous physical properties of polyvinylidene fluoride are not …
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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
- Granted September 18, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 18, 1996.
- 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.