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:
Jan. 08, 2013
Filed:
Sep. 30, 2009
Thomas B. Brust, Webster, NY (US);
James W. Blease, Avon, NY (US);
Thomas B. Brust, Webster, NY (US);
James W. Blease, Avon, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An aqueous ink composition having at least one of dispersed pigments and anionic charged polymer, and further including a lower level, relative to the concentration of pigment and anionic charged polymer, of a polyvalent metal oxide particle dispersion, wherein the ink composition has a pH of greater than 4 and the polyvalent metal oxide particles have a negative zeta potential at the pH of the ink composition. These ink compositions are effective in reducing the damage and failure of silicon-based inkjet print heads caused by ink-induced dissolution and stress cracking of the silicon-based materials found in the print heads.