Emulsifier-free coating agent, manufacture and use thereof
CA 2124263 A1 · Owner: Duecoffre, Volker · Inventors: Stephan, Werner; Flosbach, Carmen; Sadowski, Fritz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
27, Herberts Gesellschaft mit beschr?nkter Haftung Abstract:, An emulsifier-free coating agent in the form of an aqueous emulsion, a method of producing it and use thereof. The resin component of the coating agent consists of: A) 30 to 70 wt.% of a polyester oligomer polyacrylate dilutable with water after neutralisation with bases and obtainable by radical polymerisation of, 50 to 95 wt.% of one or more esters of unsaturated carboxylic acids with, hydrophobic and hydrophilic components in which, a) the hydrophobic components are based on monomeric esters of unsaturated carboxylic acids with secondary OH groups, which can be present in a mixture with comonomers free from OH groups, and, b) …
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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 May 25, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 2016.
- 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.