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:
Mar. 12, 2013
Filed:
Mar. 30, 2007
Applicant:
Keita Sensui, Tokyo, JP;
Inventor:
Keita Sensui, Tokyo, JP;
Assignee:
Zeon Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/08 (2006.01); G03G 9/135 (2006.01);
U.S. Cl.
CPC ...
Abstract
A positively charged developer for development of electrostatic images, comprising positively charged toner particles and an external additive, wherein the positively charged toner particles are colored resin particles composed of aggregated and fusion-bonded particles of fine binder resin particles and fine colorant particles and having a shape factor SF-1 of 115 to 150 and a shape factor SF-2 of 110 to 140, and the external additive is an external additive containing positively charged inorganic particles subjected to a hydrophobization treatment with an amino group-containing compound, and a production process thereof.