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:
Jun. 05, 1990
Filed:
May. 19, 1989
Applicant:
Inventors:
Assignee:
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430109 ; 430 99 ; 430120 ;
Abstract
Disclosed is a toner powder for developing latent electrostatic images comprising as a binder for pigment material a block or graft copolymer composed of a crystalline polyester and an amorphous vinyl polymer. The amorphous vinyl polymer has at least two peaks in its molecular weight distribution curve. One is between 100,000 and 1,000,000 and another is between 2000 and 20,000.