Cathodic electrodeposition coatings containing an amino ester crosslinking agent
CA 2081390 A1 · Owner: E. I. Du Pont De Nemours And Company · Inventors: Chu, Edward; Simonsick, William J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved aqueous electrocoating composition having a binder of an epoxy-amine adduct; wherein the improvement is the use of a amino ester crosslinking agent having the following formula , wherein:, n is an integer of 2-10, R is H or CH3 R1 is R2-OH or an alkyl group 1-4 carbon atoms R2 is an alkylene group having 1-4 carbon atoms R3 is an alkyl group having 1-12 carbon atoms and R4 is a polymeric component having a weight average molecular weight of about 200 - 10,000.
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 16, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 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.