Laundry detergent comprising highly ethoxylated nonionic surfactant
CA 2431979 C · Owner: Unilever Plc · Inventors: Singh, Amrat Paul; Thorley, David Christopher
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A built laundry detergent composition contains a combination of anionic nonionic and cationic surfactants which includes a highly ethoxylated nonionic surfactant which is a C8-C16 alcohol ethoxylated with an average of from 20 to 50 ethylene oxide groups. The cationic surfactant may advantageously be an ethoxylated quaternary ammonium compound. The composition exhibits improved oily soil detergency.
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 December 6, 2001 and granted June 7, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 6, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2023.
- 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.