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:
Jun. 30, 2009
Filed:
Mar. 20, 2006
Kousuke Suzuki, Numazu, JP;
Tomio Kondoh, Numazu, JP;
Shinichiro Yagi, Numazu, JP;
Hitoshi Iwatsuki, Numazu, JP;
Kousuke Suzuki, Numazu, JP;
Tomio Kondoh, Numazu, JP;
Shinichiro Yagi, Numazu, JP;
Hitoshi Iwatsuki, Numazu, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A carrier contains a core; and a cover layer located overlying the core, wherein the cover layer comprises a binder resin, a first particulate material and a second particulate material, wherein the following relationships are satisfied: 1<(D1/h)<10, and 0.001<(D2/h)<1, wherein D1(μm) represents a volume average particle diameter of the first particulate material, D(μm) represents a volume average particle diameter of the second particulate material, and h (μm) represents a thickness of the cover layer, and wherein the second particulate material has a volume resistivity of not greater than 1.0×10Ω·cm.