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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.:

US 8084179 B1

PDFFull Text
Date of Patent:
Dec. 27, 2011

Filed:

Aug. 30, 2007

Electrostatic image developing toner having specific variation coefficient of number distribution, two-component developer, image forming method and process cartridge

Applicant:

Kumi Hasegawa, Numazu, JP;

Inventor:

Kumi Hasegawa, Numazu, JP;

Assignee:

Ricoh Company, Ltd., Tokyo, JP;

Attorney:

Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

H (Holly) T Le

Int. Cl.
CPC ...
G03G 9/08 (2006.01); G03G 13/045 (2006.01); G03G 13/20 (2006.01);
U.S. Cl.
CPC ...
Abstract

A toner including: toner particles which include: a colorant, a releasing agent, and a binder resin. The number average particle diameter of the toner particles is in the range of from 3.5 μm to 6.5 μm, wherein the number average particle diameter is determined by the Coulter method, the variation coefficient of the number distribution of the toner particles is in the range of 22.0 to 35.0, wherein the variation coefficient is found by dividing the standard deviation of the number distribution by the number average particle diameter, and 40% by number to 59% by number of the toner particles are 4.0 μm to 8.0 μm in diameter.

Find Patent Forward Citations

Hasegawa, Kumi. (2011). Electrostatic image developing toner having specific variation coefficient of number distribution, two-component developer, image forming method and process cartridge (U.S. Patent No. 8084179). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8084179

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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