Glycerol-derived non ionic amphiphilic compounds, a process for their preparation, corresponding intermediary compounds and compositions containing said compounds
CA 2073353 C · Owner: Mahieu, Claude · Inventors: Mahieu, Claude; Sebag, Henri; Ribier, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Non-ionic amphiphilic, glycerol-derived compounds having formula (I) where R is a radical selected from the group consisting of C4-28 branched or linear alkenyl or alkyl radicals or mixtures thereof or is a -CH2A grouping in which A is -OR' -SR, (II) where R' is a saturated or unsaturated hydrocarbonated radical and n represents an average statistical value n &cir& NOt greater than 1 and equal to or less than 6; and when R' is a -CH2A radical, n is also 2. These compounds are surface-active agents and some may form vesicles.
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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 November 13, 1991 and granted October 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2013.
- 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.