Aqueous polymer dispersions
CA 2074034 A1 · Owner: Claassen, Peter J.M.W. · Inventors: Hummerich, Rainer; Dersch, Rolf; Claassen, Peter J.M.W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
BASFAKTIENGESELLSCHAFT O.Z.0050/42570, Aqueous polymer dispersions Abstract of the disclosure:, Aqueous polymer dispersions obtainable by polymerizing, in aqueous medium by the free radical emulsion polymerization method a mixture of monomers which, contains from 10 to 100 %w/w of halogen-containing monomers adjusting the pH, of the aqueous phase of the resulting aqueous polymer dispersion to a value of from 5 to 10 by the addition of ammonia and primary and secondary amines of different basic agents and adding, based on the mixture of monomers from 0.005, to 1 %w/w of at least one active ingredient selected from the group consisting of benzaldehyde, derivatives of benzaldehyde having one …
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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 July 16, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 16, 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.