Aqueous paints and process for manufacturing car coating varnishes
CA 2117190 C · Owner: Grosch, Horst · Inventors: Schwarte, Stephan; Grosch, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to aqueous coatings comprising, (A) a water-thinnable polyacrylate resin and (B) a blocked polyisocyanate or a mixture of blocked polyisocyanates, the water-thinnable polyacrylate resin (A) being obtainable by, (I), adding a component (a) consisting of (a1) 40 to 86.75% by weight of a (meth)acrylic acid ester which differs from (a2), is copolymerizable with (a2), (a3), (b1) and (b2) and is essentially free from carboxyl groups, or a mixture of such (meth)acrylic acid esters, and, (a2) 12 to 50% by weight of an ethylenically unsaturated monomer which is copolymerizable with (a1), (a3), (b1) and (b2), carries at least one hydroxyl group per molecule and is essentially …
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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 September 12, 1992 and granted November 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 12, 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.