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:
Nov. 07, 2000
Filed:
May. 18, 1999
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:
Int. Cl.
CPC ...
A61K / ; A61K / ; C04B / ; C07B / ;
U.S. Cl.
CPC ...
424 49 ; 424417 ; 424724 ; 514770 ; 51308 ; 433435 ; 433439 ; 106482 ; 8523 ;
Abstract
There is provided a method of adhering dye to a silica. The method comprises providing a silica slurry which includes a plurality of silica particles, depositing alum in the pores of the silica particles, reacting a base with the alum to convert the alum into aluminum hydroxide resulting in treated silica particles. The treated silica particles are then filtered and washed. Thereafter, a dye is mixed with the treated silica particles. The resultant dyed silica product is resistant to dye migration.