Foam control agents in granular form
CA 2099129 C · Owner: De Cupere, Marcel Joseph Jean · Inventors: De Cupere, Marcel Joseph Jean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides stable, free-flowing foam-control agent in granular form comprising a silicone antifoam, compound a carrier material, an organic coating material characterized in, that they contain glycerol at a weight ratio with the, silicone antifoam compound of 1:4 to 2:1. The present invention also provides detergent compositions containing said foam control agent.
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 13, 1992 and granted October 14, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 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.