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:
Mar. 10, 2009
Filed:
Jun. 20, 2006
Shunqiong Yue, San Diego, CA (US);
Howard A. Doumaux, San Diego, CA (US);
Anne M. Kelly-rowley, San Diego, CA (US);
Shunqiong Yue, San Diego, CA (US);
Howard A. Doumaux, San Diego, CA (US);
Anne M. Kelly-Rowley, San Diego, CA (US);
Hewlett-Packard Development Company, L.P, Houston, TX (US);
Abstract
A gray ink composition includes an ink vehicle having a black pigment and at least one color pigment dispersed therein. An anionic dispersant is: a) dispersed in the ink vehicle; b) associated with at least a portion of a surface of at least one of the dispersed black pigment or the at least one dispersed color pigment; and/or c) combinations thereof. At least one of the black pigment or the color pigment(s) has an anionic surfactant that is associated with at least another portion of the surface thereof.