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:
Jul. 11, 2000
Filed:
Oct. 13, 1998
Applicant:
Inventors:
Assignee:
Kao Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430109 ; 4301066 ; 430111 ;
Abstract
A toner for electrophotography including a binder resin and a colorant, in which the binder resin includes as a main component a thermoplastic resin, which is a linear polyester prepared by using upon polymerization in an amount of 20 mol % or more in an entire alcohol component at least one of the following alcohol components (A) a bisphenol A having polyoxypropylene group containing 90% or more of the compound represented by the general formula (I): ##STR1## wherein each of m and n is 0 to 2, m+n being 2.0; and (B) a bisphenol A having polyoxyethylene group containing 88% or more of the compound represented by the general formula (II): ##STR2## wherein each of p and q is 0 to 2, p+q being 2.0.