AQUEOUS CONCENTRATES OF SALTS OF .alpha.-SULFONATED FATTY ACID ALKYL ESTERS
CA 1269993 C · Owner: Henkel Kommanditgesellschaft Auf Aktien · Inventors: Piorr, Robert; Ritterbex, Horst; Jost, Frantisek
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aqueous concentrates of alkali metal salts of .alpha.-sulfonated fatty acid alkyl esters (ester sulfonate salts) which are pumpable at temperatures of at least 60°C are obtained without the addition of viscosity regulators by preparing pastes containing at least about 60% by weight of ester sulfonate salts derived from C16 and/or C18 fatty acids. More particularly the concentrates contain less than 10 mole % of ester sulfonate salts with fatty acids containing fewer than 16 carbon atoms. The concentrates are obtained by neutralizing the crude ester sulfonates with concentrated alkali hydroxide solution with intensive cooling at temperatures of at most 90°C.
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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
- Granted June 5, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 2007.
- 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.