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:
Aug. 12, 1997
Filed:
Jun. 20, 1996
Applicant:
Inventors:
William David Kappele, Lexington, KY (US);
Anna Marie Pearson, Richmond, KY (US);
Assignee:
Lexmark International, Inc., Lexington, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D / ;
U.S. Cl.
CPC ...
106 3176 ; 106311 ; 106 3186 ;
Abstract
The invention relates to an aqueous ink composition for use in ink jet printers comprising an aqueous carrier, an insoluble pigment, a polymeric dispersant, and a specific cosolvent mixture comprising 1,3-propanediol or 1,4-butanediol with a second component selected from polyethylene glycol-type materials and polyol/alkylene oxide condensates. The ink compositions demonstrate excellent stability, good maintenance characteristics for the printers in which they are used, and excellent optical density and print characteristics.