Cathodic electrodeposition paint forming films having improved surface smoothness
CA 2135093 A1 · Owner: Kawakami, Ichiro · Inventors: Kawakami, Ichiro; Nojiri, Hiroyuki; Yamada, Mitsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cathodic electrodeposition paint containing a cationically modified epoxy resin and a crosslinker dispersed in an acidic aqueous medium is disclosed. The paint contains an auxiliary resin component capable of improving the surface smoothness of the cured paint films. The auxiliary resin is a reaction product produced by reacting a t-alkylphenol novolac epoxy resin with an active hydrogen compound to open all epoxy rings. When the auxiliary resin has a hydroxyl group introduced by the reaction with the active hydrogen compound a lactone or, alkylene oxide is addition reacted with the hydroxyl group for grafting a soft segment to the auxiliary resin. By grafting a soft segment, the …
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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 November 4, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 4, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 4, 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.