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:
Feb. 18, 2020
Filed:
Mar. 07, 2019
Konica Minolta, Inc., Tokyo, JP;
Kouji Sugama, Musashino, JP;
Kazumi Oura, Sagamihara, JP;
Masaharu Matsubara, Hachioji, JP;
Ikuko Sakurada, Hachioji, JP;
KONICA MINOLTA, INC., Tokyo, JP;
Abstract
The electrostatic charge image developing toner of the present invention is an electrostatic charge image developing toner including a toner mother particle including at least a binding resin, and an external additive attached onto a surface of the toner mother particle, wherein a median size on a volume basis of the toner mother particle is in the range from 3.0 to 5.0 μm, the binding resin contains at least an amorphous polyester resin as a main component, and a spherical silica particle () having a number average particle size in the range from 20 to 55 nm is included as the external additive.