Liquid laundry detergents containing selected alkyl amidoalkoyl quaternary ammonium compounds
CA 2233332 C · Owner: Randall, Sherri L. · Inventors: Randall, Sherri L.; Sivik, Mark R.; Hartman, Frederick Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a liquid laundry detergent composition comprising a Nil-LAS surfactant system said surfactant system comprising: i) anionic surfactants selected from the group of alkyl alkoxy sulfates and alkyl sulfates, and ii) a quaternary ammonium surfactant having formula (I) whereby , R1 is a C6-C18 alkyl; y is from 1 to 6; R2 R3 and R4 are either the same or , different and can be H a C1-C8 alkyl, C1-C8 alkoxy, aryl, alkaryl or alkoxyaryl; X is a counterion.
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 27, 1996 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 27, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 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.