Shape memory polyurethane elastomer molded article
CA 1330680 C · Owner: Mitsubishi Jukogyo Kabushiki Kaisha · Inventors: Hayashi, Shunichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shape memory polyurethane elastomer molded article formed from a polyurethane elastomer which has a degree of crystallinity of 3~50 wt%, contains approximately equal amounts of NCO groups and OH groups at the terminals of the polymer, and is polymerized by the prepolymer method from a difunctional diisocyanate a difunctional, polyol, and a difunctional chain extender containing active hydrogen groups, which are formulated in a molar ratio of diisocyanate : polyol : chain extender = 2.00~1.10 : 1.00 : 1.00~0.10, preferably 1.80~1.20 : 1.00 : 0.80~0.20. It is capable of melt molding such as injection molding, extrusion molding, and blow molding and can, be manufactured freely without being …
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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 July 12, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 12, 2011.
- 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.