Process for the preparation and purification of a mixture of glycosphingolipids, free from contamination by non-conventional viruses
CA 2045142 C · Owner: Della Valle, Francesco · Inventors: Della Valle, Francesco; Lorenzi, Silvana; Callegaro, Lanfranco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a process for the preparation of a ganglioside mixture, which is free from contaminates which are associated with nonconventional, life-threatening viruses without altering the biological and pharmacological characteristics of the mixture on the central and peripheral nervous systems. The process, includes the carrying out of twelve interrelated steps.
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 November 16, 1990 and granted July 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 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
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.