Detergent compositions
CA 2026746 A1 · Owner: Unilever Plc · Inventors: Falou, Mohamed S.; Thompson, Griffith
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A detergent composition including a surfactant system the major proportion of which consists of: i) an anionic surfactant material which is a) an internal olefin sulphonate derived from an internal olefine having the general formula: R1 - CH = CH - R2 (I), of b) a vinylidene sulphonate derived from a vinylidene having the general formula: R1, C = CH2 (II), R2, or c) a mixture thereof R1 and R2 being alkyl groups, which are the same or different and have 10 to 16 carbon atoms in total; and, ii) a nonionic surfactant material having an HLB value of not more than 10.5, the weight ratio of (i) to (ii) lying between 9:1 and 1:9.
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 October 2, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2012.
- 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.