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:
Jul. 22, 2003
Filed:
Sep. 25, 2001
Applicant:
Inventors:
Goverdina Christina Helena Derksen, Wageningen, NL;
Teris André Van Beek, Opheusden, NL;
Aede De Groot, Wageningen, NL;
Anthony Capelle, Amerongen, NL;
Assignee:
Coöperatie Rubia U.A., , NL;
Primary Examiner:
Int. Cl.
CPC ...
C07B 6/100 ; C07B 1/02 ; C07B 1/16 ; A61K 7/06 ; A61K 3/500 ;
U.S. Cl.
CPC ...
C07B 6/100 ; C07B 1/02 ; C07B 1/16 ; A61K 7/06 ; A61K 3/500 ;
Abstract
The present invention relates to a method for the production of a dye preparation from madder root, comprising extraction of madder root in water at a temperature below 70-75° C., preferably below 65° C., while providing oxygen to the reaction mixture of madder root in water to obtain the dye preparation and to the dye preparation thus obtained.