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US 6,475,534 B2Granted
Ginkgo biloba composition, method to prepare the same and uses thereof
AssigneeShanghai Xingling Sci. & Tech. Pharmaceutical Co., Ltd.
InventorsDe Long Xie, Ning Wang, Qi Gao, Guo An Zhang, Bao Ping Shao, Xiao Wu Jin, Xin Sheng Huang
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Abstract
This invention provides different compositions extracted from Ginkgo biloba leaves. Said compositions comprise new active components. This invention also provides a method of preparation of the compositions and individual components of said compositions. Finally, this invention provides various uses of this composition.
Claims4
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 60°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.
4 more elements
Dependencies are inferred from the claim text.