Process for the preparation of l-.alpha.-glycerylphosphorylcholine and of l-.alpha.-glycerylphosphorylethanolamine
CA 2055503 C · Owner: Istituto Chemioterapico Italiano Fine Chemicals S.P.A. · Inventors: Tronconi, Giovanni
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is described for the purification of glycerylphosphorylcholine (GPC) and glycerylphosphorylethanolamine, (GPE) from crude deacylated mixtures obtained by deacylation of crude or deoleated soy or egg lecithin or of alcoholic extracts thereof comprising: a) the elution on a cationic resin in acid form equilibrated in anhydrous solvent of the crude solutions from the deacylation step; b) washing of the resin with alcohols or water/alcohols; c) obtaining of the pure mixture nGPC+mGPE by washing the resin with water; d) separation of nGPC+mGPE mixture by elution on basic resins to give pure GPC and GPE.
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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 May 4, 1990 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.