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. 08, 1994
Filed:
May. 27, 1992
Brian H Johnston, Rochester, NY (US);
Thomas H Whitesides, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Electrostatographic toner materials are disclosed which contains a yellow pigment which is a metal coordination complex having the formula: ##STR1## wherein R is preferably hydrogen, or SO.sub.2 NHR.sup.2 (R.sup.2 being alkyl or aryl), Z is an electron withdrawing group, Z.sup.1 is preferably alkyl, aryl or N(R.sup.3).sub.2 (R.sup.3 being alkyl, aryl or hydrogen), Me is a coordinate metal ion and L is a ligand. These pigments are formulated with fusible polymeric binders to provide a toner which exhibits excellent triboelectric properties and improved yellow color and hue when utilized in the electrostatographic process to produce colored electrophotographic images.