Antifoams and/or deaerators based on oil-in-water dispersions
CA 2339837 A1 · Owner: Heger, Robert · Inventors: Heger, Robert; Glas, Gunther; Lorencak, Primoz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a defoamer and/or deaerator based on oil-in-water emulsions which contain(s), in the hydrophobic oil phase at least one , compound that acts as a defoamer and/or deaerator and optionally contain(s) , other constituents. The oil-in-water emulsions contain 0.01 to 3 wt. % of a water-soluble, amphiphilic copolymer which comprises acid groups or they , contain a water-soluble salt thereof as a stabilizer.
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 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2021.
- 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.