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:
Sep. 14, 1993
Filed:
Dec. 13, 1991
Susumu Shimoyama, Hasuda, JP;
Yasuko Noda, Atugi, JP;
Ujo Maeda, Kyoto, JP;
Tasuku Shimoyama, Minami-ashigara, JP;
Kunio Kataoka, Fuji, JP;
Eiichi Eto, Numazu, JP;
Mieko Goto, Kanagawa, JP;
Yoshio Hara, Isehara, JP;
Satoru Shimoyama, Minami-ashigara, JP;
Keiko Maeda, Kyoto, JP;
Kazumi Konya, Ihara, JP;
Ihara Chemical Industry Co., Ltd., Tokyo, JP;
Abstract
A novel black coloring material is obtained by treating a chitosan with a dyestuff of the lithospermum root. If a water-insoluble chitosan is used as the chitosan, a finely divided black coloring material is obtained, and if a gelatinous chitosan salt is used as the chitosan, a gelatinous black coloring material is obtained. If a water-soluble chitosan, chitosan oligosaccharide or D-glucosamine, or a salt thereof is used as the chitosan, a liquid black coloring material is obtained. If a powdery polymeric substance is treated with such a black coloring material, a polymer-based black coloring material is obtained, and if a fiber is dyed with such a black coloring material, the fiber is dyed to a black color having a low lightness.