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. 27, 1993
Filed:
Oct. 09, 1991
Applicant:
Inventor:
Howard Matrick, Highlands, NJ (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09D / ;
U.S. Cl.
CPC ...
106 / ; 106 / ; 106 / ;
Abstract
An ink for ink jet printers which comprises an aqueous carrier medium, pigment dispersion or dye and a nitrogen heterocyclic diol cosolvent which retards or inhibits pluggage failure. The cosolvent has a solubility in water of at least 4.5 parts in 100 parts of water at 25.degree. C. The pigment dispersion consists of pigment particles and a polymeric dispersant, having a hydrophilic segment and a segment that links to the pigment. These inks exhibit excellent decap performance, are storage stable and give images having excellent print quality.