Patent ID: 6475534
Filing Date: 2002-11-05
Classification: A61K,A61P,Y10S

Abstract:
A method for obtaining a Ginkgo biloba composition comprising the steps of:(a) obtaining dried Ginkgo biloba leaves; (b) breaking the leaves into small pieces; (c) putting the broken leaves through a process of reflux in a solution selected from water, C1 to C3 alkanols, acetone, and a combination thereof under conditions permitting the extraction of flavonoids and lactones to produce an extract and a residue; (d) separating the extract from the residue; (e) concentrating the separated extract to a density of about 1.2 to about 1.25 at 60Â°C; (f) applying the concentrate from step (e) to at least two kinds of resin under conditions permitting binding of flavonoids and lactones; (g) eluting the bound flavonoids an lactones, thereby producing an extract containing flavonoids and lactones from Ginkgo biloba.