Uv-stable, water-borne polyester compositions
CA 2128291 C · Owner: Lewarchik, Ronald J. · Inventors: Lewarchik, Ronald J.; Sestrick, Michael R.; Smith, Marc L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aqueous dispersions having low VOCs are dispersions or solutions of polyesters. The polyesters useful are formed from A) between about 30 and about 60 mole percent polycarboxylic acids of which at least about 80 mole percent comprises cyclohexanedicarboxylic acids B) between about 35 arid about 70 mole percent polyols of which at least about 95 mole percent comprises diols and between about 40 and about 100 mole percent of the polyol content comprising cycloaliphatic diols and C) between about 5 and about 25 mole percent of a monomer having dihydroxy monocarboxylic acid functionality. The molar ratio of (B + C)/A is between about 1.01 and about 1.30 whereby the polyester is …
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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 18, 1994 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 2016.
- 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.