Heavy duty liquid detergent compositions comprising salts of alpha sulfonated fatty acid methyl esters and use of alpha-sulfonated fatty acid salts to inhibit redeposition of soilon fabric
CA 2205592 C · Owner: Malik, Arshad · Inventors: Sajic, Branko; Ryklin, Irma; Malik, Arshad
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are detergent compositions comprising: (a) an .alpha.-sulfonated alkyl ester of a fatty acid having an average of about 12-16 carbon atoms; (b) an anionic surfactant; and (c) a nonionic surfactant and methods for , preparing such compositions. Also disclosed are methods for inhibiting redeposition of soil on fabric, in which the fabric is treated with a detergent comprising a salt of an .alpha.-sulfonated fatty acid having from about 8-22 carbon atoms.
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 September 17, 1996 and granted December 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 17, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2018.
- 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.