Ionomer composition
CA 2008925 C · Owner: Hosoai, Yasuhisa · Inventors: Kawamoto, Manabu; Hirasawa, Eisaku; Hosoai, Yasuhisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Proposed herein is an ionomer composition which comprises a reaction product of from 90 to 99.5 % by weight of an ethylene copolymer ionomer (A) comprising ethylene units and unsaturated carboxylic acid salt units with from 0.5 to 10% by weight of an olefin copolymer (B) having epoxy groups in its side chains, and from 5 to 200 parts by weight based on 100, parts by weight of the reaction product of an olefin, thermoplastic elastomer (C) comprising an ethylene .alpha.-olefin copolymer rubber (a) and a polyolefin resin (b) at least one, of (a) and (b) being partly crosslinked. The proposed ionomer composition is excellent in scratch resistance and flexibility and exhibits a reduced "luster …
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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 January 30, 1990 and granted December 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2012.
- 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.