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:
Nov. 08, 1994
Filed:
Jun. 23, 1993
Applicant:
Inventors:
Eberhard Preisler, Erftstadt, DE;
Joachim Bock, Erftstadt, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; C23F / ;
U.S. Cl.
CPC ...
505410 ; 156656 ; 156666 ; 264317 ; 505450 ;
Abstract
In the process for producing molded bodies from precursors of oxidic high-temperature superconductors a copper mold of the desired shape which encloses a solidified bismuth strontium calcium cuprate melt is treated with a solution of a soluble compound containing sulfate anions, an aqueous mineral acid and an oxidizing agent until the copper mold is dissolved. A protective layer of at least one of strontium sulfate or calcium sulfate is formed on the solidified melt.