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. 01, 2002
Filed:
Jun. 19, 2000
Electrophotographic toner and electrophotographic image forming method and apparatus using the toner
Applicant:
Inventors:
Masanori Suzuki, Shizuoka-ken, JP;
Hiroaki Matsuda, Numazu, JP;
Akemi Sugiyama, Numazu, JP;
Hiroto Higuchi, Shizuoka-ken, JP;
Tsunemi Sugiyama, Numazu, JP;
Assignee:
Ricoh Company Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/00 ;
U.S. Cl.
CPC ...
G03G 9/00 ;
Abstract
An electrophotographic toner including at least a binder resin, a colorant, and a releasing agent, wherein the binder resin includes one or more components soluble in tetrahydrofuran, and wherein the one or more components has a molecular weight distribution such that at least one peak is present between 1,000 and 10,000, and the peak has a half width not greater than 15,000 when the molecular weight is measured by a gel permeation chromatography (GPC) method.