Polyester and vinyl ether radiation curable compositions with reactive diluent
CA 2193529 C · Owner: Weissberg, Alan B. · Inventors: Friedlander, Charles B.; Weissberg, Alan B.; Mcentire, Edward E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid, radiation curable composition is disclosed that includes a reactive diluent to lower initial application viscosity without substantial reduction of cure rate. The composition of the present invention comprises: (a) an unsaturated polyester polymer; (b) a non-polymerized cocurable polyfunctional , vinyl ether component; and (c) a reactive diluent which is an unsaturated dioic acid ester having the structural formula (1) wherein at least one of R1 , and R2 is a group that includes an oxygen with a carbon adjacent thereto and an abstractable hydrogen attached to the carbon.
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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 April 28, 1995 and granted March 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2017.
- 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.