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. 30, 1993
Filed:
Jan. 17, 1992
Applicant:
Inventors:
Rodney O Aulick, Lexington, KY (US);
Bradley L Beach, Lexington, KY (US);
Donald L Elbert, Lexington, KY (US);
Terence E Franey, Lexington, KY (US);
James F Feeman, Wyomissing, PA (US);
John M Olson, Boulder, CO (US);
Allen C Sanders, Winchester, KY (US);
Robert L Vollmer, Boulder, CO (US);
Assignee:
Lexmark International, Inc., Greenwich, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09D / ;
U.S. Cl.
CPC ...
106 / ; 534810 ; 534811 ; 534812 ; 534815 ; 534829 ; 534836 ; 534837 ;
Abstract
A alkali-soluble dye for a waterfast ink having structural formula as follows: ##STR1## and an ink containing the dye dissolved in water. Printing from the ink is insoluble below pH 6.0; is an intense black at low concentration; and remains black on acid papers. The aqueous inks are stable and exhibit good printhead nozzle maintenance.