Three component aminoamide acrylate resin compositions
CA 2061769 C · Owner: Frihart, Charles R. · Inventors: Frihart, Charles R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides acrylate-modified polyamide resins comprising the Michael addition product of a mixture of a thermoplastic polyamide and reactive diluent with a polyol ester having a plurality of acrylate ester groups, wherein the mole ratio of the initial acrylate groups of the polyol ester to the initial amino groups of the thermoplastic polyamide ranges from about 0.5 to about 8, and wherein from about 1a to about 25% by weight of the resin is polyamide of the reactive diluent. The diluent comprises one or more mono- and di-substituted amines of 10 to 44 carbon atoms.
Read the whole patent
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 February 25, 1992 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2014.
- 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.