Vinyl ester latices
CA 2005082 A1 · Owner: Vermeulen, J. · Inventors: Vermeulen, J.; Scholten, Henricus P. H.; Coppin, Linda L. G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The free monomer content of latices formed by emulsion polymerization of vinyl acetate and the vinyl ester(s) of branched chain carboxylic acid(s) can be reduced by the presence of an amount of from 0.1 to 5% by weight based on the total weight of components (a) (b) and (c) of an alkali metal or alkaline earth metal vinyl sulphonate and preferably in an amount of from 0.75% to 5% by weight. DO4/T0809FF
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 December 11, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 11, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2011.
- 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.