Process for preparing ether-capped poly(oxyalkylated) alcolhol surfactants
CA 2297831 A1 · Owner: Sivik, Mark Robert · Inventors: Sivik, Mark Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing an ether-capped poly(oxyalkylated)alcohol surfactant is provided. The alcohol has the formula: R1OCH2CH(R3)OxCH2CH(OH)CH2OR2 wherein R1 and R2 are linear or branched saturated or unsaturated, aliphatic , or aromatic hydrocarbon radicals having from 1 to 30 carbon atoms; R3 is H or , a linear aliphatic hydrocarbon radical having from 1 to 4 carbon atoms; x is an integer having an average value from 6 to 15 wherein when x is 2 or , greater R3 may be the same or different; further wherein when x is 15 or greater and R3 is H and methyl, at least four of R3 are methyl further , wherein when x is 15 or greater and R3 includes H and from 1 to 3 methyl groups, then at …
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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 July 31, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 31, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2020.
- 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.