Composite coating with primary or tertiary amine-blocked aromatic sulfonic acid catalyst
CA 2102818 C · Owner: Campbell, Donald H. · Inventors: Campbell, Donald H.; Briggs, Rodney L.; Montagne, Mark R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coated article is described comprising a substrate having thereon a color-plus-clear composite coating wherein (a) the color layer of the composite coating is derived from a coating composition comprising:, (1) a polymer component having active hydrogen-containing groups thereon, (2) an aminoplast curing agent (3) an acid cure catalyst, and, (4) a substituted or unsubstituted alkyl amine having at least one alkyl substituent of at least 8 carbon atoms and, (b) the clear layer of the composite coating is derived from a curable coating composition comprising an epoxy-functional component and an acid-functional or anhydride-functional component.
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 November 10, 1993 and granted January 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 10, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2015.
- 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.