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:
Feb. 18, 2014
Filed:
Sep. 15, 2011
Qin Liu, Corvallis, OR (US);
Zhang-lin Zhou, Palo Alto, CA (US);
Yaron Grinwald, Meitar, IL;
Gil Bar-haim, Holon NA, IL;
Qin Liu, Corvallis, OR (US);
Zhang-Lin Zhou, Palo Alto, CA (US);
Yaron Grinwald, Meitar, IL;
Gil Bar-Haim, Holon NA, IL;
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A dual color electronically addressable ink includes a non-polar carrier fluid; a first colorant of a first color; and a second colorant of a second color that is different than the first color. The first colorant includes a first particle core, and a first functional group attached to a surface of the particle core. The first functional group is capable of carrying a positive charge and is chosen from a base or a salt of the base. The second colorant includes a particle core, and a second functional group attached to a surface of the particle core. The second functional group is capable of carrying a negative charge and is chosen from an acid or a salt of the acid. The ink further includes an additive chosen from polyhydroxystearic amide salt, polyhydroxystearic acid, aromatic butyric acid, and combinations thereof.