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:
May. 25, 1999
Filed:
Mar. 17, 1997
Yoshihiko Nakano, Tokyo, JP;
Shuji Hayase, Yokohama, JP;
Sawako Fujioka, Tokyo, JP;
Takeo Ito, Kumagaya, JP;
Satoshi Mikoshiba, Yokohama, JP;
Hideo Hirayama, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A black coloring composition comprising, a black inorganic pigment formed of an oxide having an average particle diameter of 0.5 .mu.m or less and comprising at least one kind of metal s elected from metals belonging to Groups 4 to 11 and also to the fourth period, at least one kinds of dispersant selected from the group consisting of polyvinyl butyral resin represented by the following general formula (1), polyacrylic resin represented by the following general formula (2), and a higher carboxylic acid represented by the following general formula (3), and an organic solvent: ##STR1## wherein x=0.01 to 0.9, y.ltoreq.0.05, and n is an integer; ##STR2## wherein R.sup.1 is selected from hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group and a substituted or unsubstituted aromatic hydrocarbon group, R.sup.2 is selected from a substituted or unsubstituted aliphatic hydrocarbon group and a substituted or unsubstituted aromatic hydrocarbon group, R.sup.3 is selected from hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group and a substituted or unsubstituted aromatic hydrocarbon group, a=0 to 0.9, and n is an integer;