Biodisintegrable thermoplastic resin moldings and a process for producing same
CA 2029481 C · Owner: Director-General Of Agency Of Industrial Science And Technology · Inventors: Iwamoto, Akira; Tokiwa, Yutaka; Takeda, Kiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hiodisintegrable thermoplastic resin moldings and a process for producing same are disclosed the biodisintegrable, thermoplastic resin moldings being comprised of a thermoplastic aliphatic polyester resin as a matrix resin having dispersed therein an other type of thermoplastic resin in a proportion of 40-75 weight % based on the whole resin. The biodisintegrable thermoplastic resin moldings is easily disintegrable after disposal in an environment where microorganisms exist so that the moldings can be reduced in bulkness and give no harmful effect on the life of natural plants and animals. Thus the, present invention affords an effective means for solving various problems in the treatment …
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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 November 7, 1990 and granted December 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 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.