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. 31, 1992
Filed:
Mar. 10, 1989
Tsuyoshi Masumoto, Sendai, JP;
Akihisa Inoue, Sendai, JP;
Kunio Matsuzaki, Sendai, JP;
Keiji Moroishi, Akishima, JP;
Tsuyoshi Masumoto, Miyagi, JP;
Hoya Corporation, Tokyo, JP;
Abstract
A metal oxide-type superconductive material is produced by a process which comprises a first step of subjecting a powder raw material containing given proportions of metal elements to be contained in said metal oxide-type superconductive material, to mechanical grinding and alloying simultaneously to obtain an alloy powder and a second step of heat-treating the alloy powder in an oxygen-containing gas atmosphere to obtain a metal oxide. The superconductive material obtained has a high density, a low porosity, a high strength and a high critical current density.