Thermosetting polyester resin
CA 2179375 A1 · Owner: Binns, Malcolm Ross · Inventors: Viatos, Jim; Binns, Malcolm Ross; Maliphant, Jenny Anne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a polyester resin for use in a thermosetting coating composition, said polyester comprising an acid component an alcohol , component and a trifunctional branching agent; wherein the acid component consists of from 90 to 100 mole % of an aromatic acid or aromatic anhydride or mixture thereof and from 0 to 10 mole % of a polycarboxylic acid or polycarboxylic anydride or mixture thereof; and wherein the alcohol component consists of at least 60 mole % of one or more glycols selected from the group consisting of CH3-CH2-C(CH2OH)2-R1 wherein R1 is an alkyl and derivatives of said glycols, from 0 to 20 mole % of neopentylglycol and of up to 20 mole % , of a …
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 December 21, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 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.