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. 24, 1990
Filed:
Jul. 15, 1988
Applicant:
Inventors:
Assignee:
Vereinigte Edelstahlwerke AG (VEW), Vienna, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ;
U.S. Cl.
CPC ...
148 / ; 148 124 ; 148 / ;
Abstract
The method of manufacturing nonmagnetic drilling string components, especially heavy duty drill-stems for exploratory bores, e.g. for deposits of crude oil and/or natural gas deposits, such as directional bores or the like, includes the step of melting and allowing to solidify an alloy consisting essentially of, each in percent by weight: