Copolymerization of cyclic ester oligomers
CA 2489795 C · Owner: Ticona Llc · Inventors: Brugel, Edward G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Chemically different cyclic ester oligomers can be copolymerized to form copolyesters , whose properties can be tailored by the choice of cyclic ester oligomers used. The , copolyesters formed are especially useful as encapsulants and as coatings. In many instances , the copolyesters, assuming they are not randomized in later transesterification reactions, have , unique microstructures related to the sequencing of repeat units of their polymer chains.
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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 July 11, 2003 and granted February 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2025.
- 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.