Aqueous branched polymer dispersion
CA 2177810 C · Owner: E. I. Du Pont De Nemours And Company · Inventors: Antonelli, Joseph Albert; Scopazzi, Christopher; Becton, Lee Edwin Allen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous coating composition comprising a dispersed graft copolymer characterized by attached at a terminal end thereof to a polymeric backbone which is acid functional wherein the functional groups have been neutralized. Such compositions provide improved properties for an automotive finish.
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 January 19, 1995 and granted March 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 19, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2017.
- 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.