Antifoam based on oil-in-water emulsion
CA 1298754 C · Owner: Bergold, Wolfram · Inventors: Bergold, Wolfram; Degen, Hans-Juergen; Melzer, Jaroslav
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In antifoams based on oilin-water emulsions, the oil phase of the emulsions contains, (a) a C12-C26-alcohol, a distillation residue which is obtainable in the preparation of alcohols having a relatively large number of carbon atoms by the oxo process or by the Ziegler process and which may furthermore be oxyalkylated and/or, (b) a fatty acid ester of a C12-C22-carboxylic acid with a monohydric to trihydric C1-C18-alcohol and if, required, (c) a hydrocarbon having a boiling point above 200°C or a fatty acid of 12 to 22 carbon atoms, accounts for from 5 to 50% by weight of the emulsion and has a mean particle size of less than 25 mm and from 5 to, 50% by weight of components (a) and (b) 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
- Granted April 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 2009.
- 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.