Process for the isolation of purified gangliosides from ganglioside-containing living tissue
CA 2002155 A1 · Owner: Council Of Scientific And Industrial Research · Inventors: Gupta, Kailash C.; Gaur, Rajesh K.; Kant, Krishna
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the isolation and purification from ganglioside-containing living tissue of gangliosides having a salic acid content of more than 30% by weight which comprises dehydrating macerated tissue extracting, the dehydrated tissue as a powder with a chloroform-methanol mixture, extracting the chloroform-methanol fraction with saline, separating from the extract thus obtained a methanolsaline fraction, loading said methanol-saline fraction on to a column filled with silica gel having non-polar functional groups, i.e. reverse-phase silica gel, packed within a solvent washing said column with an organic solvent eluting the de-, sired gangliosides from said column …
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 3, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 3, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 2011.
- 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.