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:
Oct. 12, 2010
Filed:
Apr. 09, 2009
Applicants:
Christian Gerk, Wallmoden, DE;
Klause-dieter Wernicke, Bad Sackingen, DE;
Inventors:
Christian Gerk, Wallmoden, DE;
Klause-Dieter Wernicke, Bad Sackingen, DE;
Assignee:
H.C. Starck GmbH, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/16 (2006.01); E21B 10/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a drill bit containing tungsten carbide powder having powder particles which have a core of cast tungsten carbide and a shell of tungsten monocarbide.