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:
Jan. 12, 1993
Filed:
Sep. 11, 1991
Applicant:
Inventors:
Assignee:
Fuji Xerox Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430110 ; 430107 ;
Abstract
A positively chargeable electrophotographic toner is disclosed, which is prepared by adding to toner particles silica fine particles having been surface treated with a homo-or copolymer comprising, as a monomer component, a dialkylaminoalkyl acrylate or a dialkylaminoalkyl methacrylate in the form of a quaternary ammonium salt. The toner has improved fluidity and improved anti-caking properties while exhibiting satisfactory charging properties and environmental stability and causing no image defects.