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:
Nov. 09, 1999
Filed:
Aug. 29, 1997
Applicant:
Inventor:
Gary W Byers, Vista, CA (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D / ;
U.S. Cl.
CPC ...
106 3148 ; 106 3157 ;
Abstract
A class of magenta dye chromophores generally described as metal complexes with dye ligands of 4-hydroxy-3-(2'-pyridylazo)-1-(sulfo substituted) naphthalene for use in ink-jet inks is disclosed. The dye ligands are coordinated to a polyvalent metal. The dye-metal complexes of the present invention provide excellent ink-jet prints having excellent lightfastness when exposed to direct sun light as well as office light.