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. 06, 1989
Filed:
Nov. 12, 1987
Applicant:
Inventors:
Hirokazu Yamamoto, Nagaokakyo, JP;
Akira Furukawa, Nagaokakyo, JP;
Assignee:
Mitsubishi Paper Mills, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430115 ; 430904 ;
Abstract
This invention provides a negative-charging liquid developer for electrostatic photography excellent in charge stability and dispersion stability which comprises a highly insulating carrier liquid in which resin particles containing a charge control agent are dispersed, said charge control agent being a carboxylic acid amine salt which comprises a polycarboxylic acid compound insoluble in said carrier liquid and a high molecular amino compound soluble in said carrier liquid.