Alkyl and/or alkenyl oligoglycoside isethionates
CA 2123201 A1 · Owner: Weuthen, Manfred · Inventors: Weuthen, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns alkyl and/or alkenyl oligoglycoside isethionates prepared by reacting with salts of vinyl sulphonic acid at elevated temperature and in the presence of basic compounds alkyl and/or alkenyl oligoglycosides of the formula (I): R1O-Gp, in which R1 is a straight-chain or branched-chain aliphatic hydrocarbon group with 6 to 22 carbon atoms and 0 1, 2 or 3, double bonds, G is a glucose unit with 5 or 6 carbon atoms and p is a number between 1 and 10. The products exhibit marked surface-active characterictics.
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 30, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2014.
- 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.