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:
Aug. 22, 1989
Filed:
Oct. 09, 1987
Applicant:
Inventors:
Tadashi Nakamura, Nara, JP;
Yaosuo Kitabatake, Nara, JP;
Yoshiaki Takahashi, Nara, JP;
Kazuya Maeda, Osaka, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430137 ; 430110 ; 430138 ; 428402 ;
Abstract
A method of producing toner particles for use in electrophotography where the particles have a colored resin core particle containing a resin and a colorant and charge controlling layer on the particle's outer surface. The charge controlling layer contains a charge controlling agent but not any colorant. The method comprises the steps of: