Modified polyester composition and preparation process and use thereof
CA 2017281 C · Owner: Mitsui Chemicals Inc. · Inventors: Shinoda, Hosei; Ohtaguro, Masami; Iimuro, Shigeru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel bioabsorbable polyester are provided herein. Such bioabsorbable polyester compositions are obtained by mixing a polyester containing a glycolic acid unit and/or a lactic acid unit, with a polyether modified siloxane represented by the Formula (I):, wherein R1 and R'1 are a hydrogen an alkyl group, a, hydrogen terminated polyaxyalkylene group having a polymerization degree of 200 or less, a hydroxyl group a, hydroxyalkyl group or a hydroxy terminated polyoxyalkylene group having a polymerization degree of 200 or less and at, least one of R1 and R'1 is a hydroxy terminated polyoxyalkylene group having a polymerization degree of 200 or less, or a hydroxy terminated polyoxyalkylene group …
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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 May 22, 1990 and granted January 16, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 22, 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
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.