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:
Apr. 21, 1992
Filed:
Apr. 19, 1990
Applicant:
Inventors:
Zhengzhi Sheng, Fayetteville, AR (US);
Allen M Hermann, Fayetteville, AR (US);
Assignee:
University of Arkansas, Little Rock, AR (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01F / ; C01G / ; C01G / ; H01L / ;
U.S. Cl.
CPC ...
505-1 ; 252521 ; 423604 ; 423624 ; 423635 ; 501123 ; 505783 ;
Abstract
A high temperature superconducting system has the general composition Tl-R-X-Y, wherein: R is a Group 2A element; X is a group 1B element; and Y is a Group 6A element. Preferably, the composition has the following formula Tl-Ba-Cu-O. The high temperature superconductor of the present invention has a transition temperature of about 90 K with the probability of one phase superconducting at a temerature perhaps as high as 270 K. Processes for making the high temperature superconductor are also provided.