Method for the preparation of metal soap aqueous dispersions
CA 2097645 A1 · Owner: Zilberman, Ekhiel · Inventors: Zilberman, Ekhiel; Lerner, Felix
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved method for preparing aqueous dispersions of metal soaps in the presence of an ionic surfactant formed in-situ is described.The method comprises two main steps: (a) partially neutralizing a saturated or unsaturated fatty acid containing between 8 to 28 carbon atoms with an alkali metal oxide or hydroxide including ammonia and (b) mixing the resulted dispersion with an aqueous dispersion of a metal oxide or hydroxide, said metal being selected from calcium, magnesium, calcined calcium carbonate, calcined dolomite, strontium barium and any, mixture thereof. The preferred alkali metal used in step (a) is selected from lithium, sodium, potassium and any mixture thereof. The fatty …
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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
- Filed June 3, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 3, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.