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. 21, 2000
Filed:
May. 04, 1998
Applicant:
Inventors:
Michael Koch, Bruchkobel, DE;
Wulf Kock, Alzenau, DE;
David Francis Lupton, Gelnhausen, DE;
Friedhold Scholz, Rodenbach, DE;
Assignee:
W. C. Heraeus GmbH & Co. KG, Hanau, DE;
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
420590 ; 420 83 ; 420433 ; 420455 ; 420435 ; 420440 ; 420129 ;
Abstract
A process for making iron, cobalt and/or nickel base alloys containing rhenium. The process involves melting together the components that form the alloys, at least one of the components being a rhenium master alloy having 30 to 70 wt % rhenium, then casting the resultant melt and allowing the melt to solidify. Possible difficulties such as the formation of rhenium heptoxide are avoided by using a master alloy containing (i) rhenium and (ii) iron, cobalt and/or nickel, instead of sintered rhenium as the rhenium source during the melting step.