The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2004
Filed:
May. 10, 2002
Applicant:
Inventors:
Herwig Buchholz, Frankfurt, DE;
Michael Jungnitz, Frankfurt, DE;
Michael Grund, Darmstadt, DE;
Ralf Rosskopf, Munster, DE;
Hartmut Härtner, Muhltal, DE;
Assignee:
Merck Patent GmbH, Darmstadt, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07G 3/00 ; C07H 1/500 ; C07H 1/700 ;
U.S. Cl.
CPC ...
C07G 3/00 ; C07H 1/500 ; C07H 1/700 ;
Abstract
The invention relates to a method for recovering high-purity isoquerectin from bioflavonoid pastes, that is from mother-liquor residues which are produced during the recovery of flavonoids, by extraction with a solvent mixture of methyl acetate and water.