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. 27, 1999
Filed:
Oct. 06, 1997
Applicant:
Inventors:
Toshiyuki Uemura, Tokyo, JP;
Tsukasa Iguchi, Tokyo, JP;
Sunao Satake, Tokyo, JP;
Hisashi Uraki, Tokyo, JP;
Yasuharu Iida, Tokyo, JP;
Assignee:
Toyo Ink Manufacturing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09C / ;
U.S. Cl.
CPC ...
106493 ; 106 316 ; 106 3165 ; 106 3175 ; 106410 ; 106411 ; 106495 ; 106496 ; 106497 ;
Abstract
A surface-treated organic pigment excellent in initial dispersibility and long-term dispersion stability in water and an organic solvent and free from the coagulation of pigment particles, obtained by reacting a sulfonating agent with an organic pigment dispersed in a solvent in which the organic pigment is insoluble or sparingly soluble, and thereby introducing a sulfonic acid group to the surface of each particle of the organic pigment.