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. 01, 1997
Filed:
Dec. 14, 1992
Yoko Ishimaru, Yokohama, JP;
Hirobumi Ohmori, Yokohama, JP;
Shin-ichi Nakamura, Yokohama, JP;
Michihiko Inaba, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kanagawa-ken, JP;
Abstract
A decorative article comprises as essential components 5 to 95% by weight of Cu 5 to 95% by weight of a copper based component in which at least one kind of metal selected from a group consisting of Au, Pb, Zn, Sn, Ni and Al is solid-dissolved in Cu, and a balance of Fe and unavoidable impurities. The decorative article exhibits a color tone satisfying a formula x.gtoreq.0.3 and/or y.gtoreq.0.3 for which chromaticity coordinates x and y in a X-Y-Z colorimetric system are used. Usually, the decorative article iron alloy is practically used in the form of a plate and contains a cast structure in a part of its matrix while exhibiting a dislocation density of 10.sup.2 dl/cm.sup.2 or more. The cast structure is a dendritic structure which extends from the surface of the plate in the direction of a thickness of the latter. A thickness of the dendritic structure is determined to be 1/10 or more of the thickness of the plate.