Coatings with improved resistance to suntan lotion
CA 2255159 A1 · Owner: Shaffer, Myron W. · Inventors: Parkerson-Hoy, Shelley; Shaffer, Myron W.; Martin, Kyli
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an aqueous coating composition containing prior to the reaction between components A) and B) A) 10 to 75 wt.%, based on the solids contents of components A) and C), of at least one dispersion or solution of a polyester polyol containing carboxylate and/or sulphonate groups having a weight, average molecular weight of 1,000 to 40,000 an OH number of 15, to 100 and an acid number of 2 to 40 based on all of the carboxylate, carboxyl and sulphonate groups B) an ester-modified polyisocyanate having an average NCO functionality of 2 to 6 and containing 5 to 20 wt.% of ester groups (calculated as C3O2, MW 68), 5 to 18 wt.% of isocyanate groups and 0 to 20 wt.% of …
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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 December 4, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2020.
- 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.