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:
Mar. 23, 1999
Filed:
Dec. 19, 1995
Applicant:
Inventors:
Takeo Itou, Kumagaya, JP;
Hidemi Matsuda, Fukaya, JP;
Hisashi Chigusa, Urawa, JP;
Kazuo Sakai, Kawanishi, JP;
Masaru Fukuda, Osaka, JP;
Assignees:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Fuji Pigment Co., Ltd., Kawanishi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03F / ;
U.S. Cl.
CPC ...
430320 ; 430-7 ; 430321 ; 430 28 ; 430 29 ;
Abstract
There is disclosed a salt of a polymer having charged anionic functionalities used as a dispersant in a dispersion solution containing a pigment and used for forming a first pigment layer. A substance which forms a salt with a polymer having charged anionic functionalities is mixed into a solution applied on the pigment layer, and/or mixed into a developing solution. The formed layers are patterned and thus a display screen is obtained.