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:
Dec. 02, 1997
Filed:
Nov. 20, 1996
Hodogaya Chemical Co., Ltd., Kawasaki, JP;
Abstract
Disclosed herein is an electrostatic image developing toner, which comprises a binder resin, a colorant and a charge control agent, wherein the charge control agent is a hydrophobicity-imparted product of a xanthene-type dye, which is represented by the formula ##STR1## wherein R.sub.1, R.sub.3, R.sub.5, R.sub.6 and R.sub.7 are independently hydrogen or a lower alkyl group, R.sub.2 and R.sub.4 are independently a lower alkyl group, and A is a group represented by the formula ##STR2## in which R.sub.8 is a C.sub.8-37 alkyl group, or the formula ##STR3## in which R.sub.9 is a C.sub.1-37 alkyl group, and X is O, S, NH or CH.sub.2, and is contained in a proportion of 0.05 to 10 parts by weight per 100 parts by weight of the binder resin.