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. 07, 2003
Filed:
Apr. 26, 2001
Applicant:
Inventors:
Hiroshi Yamashita, Numazu, JP;
Tomio Kondou, Numazu, JP;
Hideki Sugiura, Fuji, JP;
Hachiroh Tosaka, Shizuoka-ken, JP;
Osamu Uchinokura, Shizuoka-ken, JP;
Hitoshi Ueda, Fuji, JP;
Yoshihiro Suguro, Numazu, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/113 ;
U.S. Cl.
CPC ...
G03G 9/113 ;
Abstract
A toner including a binder resin; a colorant; and an external additive, wherein the external additive includes a particulate inorganic material, and a silicone oil, wherein the silicone oil is present on the particulate inorganic material in an amount of Ws by weight and present as a free silicone oil in an amount of Wfs by weight, and a free silicone degree defined as a ratio Wfs/Ws is from 10 to 70%.