Particulate foam control agents
CA 2128799 A1 · Owner: Prince, Mark A. · Inventors: Kolaitis, Leonidas; Lenoble, Bertrand L. J.; Prince, Mark A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A particulate foam control agent comprises 1 to 30 parts silicone antifoam, 70 to 99 parts zeolite carrier 1 to 60% of, the antifoam of an organopolysiloxane polyoxyalkylene copolymer, deposited onto the zeolite carrier not later than the antifoam and 1 to 40 parts by weight of a polycarboxylate type binder or encapsulant. This combination give good release in early stages, storage stability and powder characteristics.
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 July 26, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 26, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 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.