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. 11, 2000
Filed:
Feb. 03, 1998
Applicant:
Inventors:
Akira Takano, Yokohama, JP;
Osamu Ieda, Kawasaki, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430110 ; 430111 ; 399253 ;
Abstract
A developing agent comprising toner particles and carrier particles, the toner particles including less than 21% of particles having a roundness of less than 0.93, and containing a binder resin, a coloring agent, and an charge controlling agent free from heavy metals.