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:
Sep. 28, 1999
Filed:
Oct. 10, 1996
Applicant:
Inventor:
Hiromitsu Kawase, Mishima, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430109 ; 430110 ; 430111 ;
Abstract
A toner having toner particles for developing latent electrostatic images, each toner particle containing a binder resin and a coloring agent, tho binder resin including a vinyl polymer prepared by polymerizing a plurality of different vinyl monomers, with a weight-average molecular weight (Mw) of 30,000 or less, and a peak molecular weight (PMw) of 10,000 or less in the weight-average molecular weight (Mw), with the amount ratio of a vinyl polymer with a molecular weight of not less than the value of PMw.times.10 being in the range of 1 to 30 wt. % of the entire amount of the vinyl polymer.