Heat-curable coating composition for cathodic electrocoating
CA 2010431 C · Owner: Schupp, Hans · Inventors: Heimann, Ulrich; Huemke, Klaus; Schupp, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat-curable coating, composition for cathodic electrocoating which becomes water-thinnable on protonation with an acid contains (A) 50-95% by weight of a polycondensation or polyaddition product having an average molecular weight of from 500 to 20,000 and containing primary and/or secondary hydroxyl groups and primary, secondary and/or tertiary amino groups, and, (B) 5-50% by weight of a crosslinking agent obtainable by reacting, a) an aliphatic polyhydroxy compound and b) an aromatic polyhydroxy compound with c) an aliphatic and/or cycloaliphatic, polyisocyanate and d) a blocking agent.
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 February 20, 1990 and granted May 25, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 20, 2012.
- 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.