Detergent foam control agents
CA 2059677 C · Owner: Dow Corning S.A. · Inventors: Smith, Graeme S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Particulate foam control agents for powder detergents consist of 1 part by weight of silicone antifoam not less than, 0.3 part by weight of a water insoluble fatty acid or a fatty alcohol with 12 to 20 carbon atoms and a melting point in the range 45 to 80°C or a monoester of glycerol and a fatty acid and a native starch carrier material. They give improved storage stability and require less organic material than the prior art agents.
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 January 20, 1992 and granted May 29, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 20, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 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.