Cleaning composition comprising saturated dialkyl cationic surfaces
CA 2211346 C · Owner: Unilever Plc · Inventors: Leach, Matthew James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The specification discloses improved compositions which both clean a surface and are believed to deposit thereupon a layer of cationic surfactant which assists the release of soil subsequently deposited upon the said surface. These comprise a surfactant mixture wherein said surfactant mixture itself comprises: a) at least 65 % wt on total surfactant of nonionic surfactant; b) less than 1 % wt on total surfactant of anionic surfactant; and c) 0.1-35 % wt on total surfactant of a cationic surfactant which is a substantially ethylenically saturated dialkyl quaternary ammonium compound.
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 February 7, 1996 and granted October 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 7, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 7, 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.