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. 06, 1999
Filed:
May. 13, 1997
Applicant:
Inventors:
Robin Gant Gnerlich, Lexington, KY (US);
Anna Marie Pearson, Richmond, KY (US);
Ashok Vishnu Gangal, Lexington, KY (US);
Assignee:
Lexmark International Inc., Lexington, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D / ;
U.S. Cl.
CPC ...
106 3186 ; 106 316 ; 106 3185 ; 523160 ; 523161 ;
Abstract
A method for making a dispersion for an ink, and the ink obtained from this method. The method comprises preparing a dispersion comprising colorant agglomerates and reducing the agglomerate size using a plastic medium. The dispersion is formed by dispersing the colorant agglomerates in a dispersant, optionally in the presence of a liquid carrier such as distilled or deionized water. The colorant in the dispersion may be a carbon black, yellow, cyan, or magenta pigment, or a combination thereof. The plastic medium is preferably a grinding medium, such as polystyrene.