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:
Oct. 07, 2003
Filed:
Aug. 31, 2001
Applicant:
Inventors:
Kathleen S. Pike, Bel Air, MD (US);
John A. Kostinko, Bel Air, MD (US);
Assignee:
J. M. Huber Corporation, Edison, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09B 6/300 ;
U.S. Cl.
CPC ...
C09B 6/300 ;
Abstract
Calcium phosphate colorants are provided that comprise calcium phosphate particles, a dye, and aluminum hydroxide and which are resistant to dye migration and suitable for use in food, drugs and cosmetics. The calcium phosphate particles are coated with a dye and the dye is fixed to the particles by the aluminum hydroxide. Also provided is a method for making a calcium phosphate colorant in which aluminum hydroxide is mixed with a calcium phosphate slurry to deposit aluminum hydroxide onto the calcium phosphate particles contained within the slurry.