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:
Apr. 07, 1981
Filed:
Jan. 19, 1978
Applicant:
Inventors:
Bernard Mirabel, Fresnes, FR;
Francois Meiller, Palaiseau, FR;
Assignee:
Rhone-Poulenc Industries, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ;
U.S. Cl.
CPC ...
8646 ; 8 53 ; 8440 ; 426250 ; 8438 ; 8439 ;
Abstract
Aqueous solutions of anthocyans are purified by contacting same with a particular, metallic oxide adsorbent, said adsorbent being coated with a thin film of a styrene polymer, and thence by separating the adsorbent and treating it with an eluant. The eluate and the dry, powdery anthocyans which can be obtained therefrom are useful red, blue and violet industrial colorants, especially food colorants.