Non-ionic surfactant compositions
CA 2250093 A1 · Owner: Imperial Chemical Industries Plc · Inventors: Thomas, Hugh; Daniels, Judith
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Alcohol ethoxylate surfactants particularly useful in detergents are combinations of formulae HO.(EO)n1.R1 (Ia) and HO.(EO)n2.R2 (Ib) where EO is ethyleneoxy; n1 is 3 to 8; n2 is 4.5 to 9; R1 is c8 to C12 alkyl and on average C9 to less than C12; and R2 is C12 to C16 alkyl and on average C12 to C15; in weight proportions so the average carbon number in R1 and R2 is 10.5 to 12 and the overall average number of EO units is 4.5 to 8. Such combinations afford a combination of good surfactancy particularly , detergency, with low aquatic toxicity. Desirably the composition is of mixed-, alcohol ethoxylates i.e. alcohol ethoxylates made by ethoxylating a mixture of alcohols to satisfy the …
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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 April 11, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2019.
- 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.