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:
Aug. 29, 2000
Filed:
Jul. 23, 1998
Applicant:
Inventors:
Bernhard Altmann, Langerringen, DE;
Rudolf Richter, Schwabmuenchen, DE;
Klaus Stedele, Kaufering, DE;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
445 49 ; 313631 ;
Abstract
The electrode of tungsten material has a cylindrical shaft and a conical tip, in which the conical tip is made essentially by radial deformation, such as hammering or cross-rolling, of the tip portion (9) of the electrode blank (5). This changes the grain structure to be converging. A flat top or plateau (10) can be ground at the very end of the tip.