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. 30, 1993
Filed:
Feb. 26, 1992
Applicant:
Inventors:
Assignee:
Kao Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430109 ; 430137 ;
Abstract
The present invention is directed to a toner composition containing a polyester resin as a major component of a binder resin and 0.01 to 1.5 parts by weight of hydrophobic silica having a degree of hydrophobic property of not less than 80, and/or having a pH value of 5.5 to 8 when 4% by weight of hydrophobic silica is dispersed in water-methanol solution (1:1) to 100 parts by weight of the toner.