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. 28, 2007
Filed:
Jul. 25, 2003
Applicants:
Kazuo Yamamoto, Naka-gun, JP;
Tadakazu Ohashi, Hitachinaka, JP;
Akhmadi Eko Wardoyo, Naka-gun, JP;
Inventors:
Assignee:
Mitsubishi Materials Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 10/46 (2006.01);
U.S. Cl.
CPC ...
Abstract
A cutting tip for a drilling tool includes a cemented carbide cutting base, a diamond elementsupported by the cutting base, and a bonding layer formed between the cutting baseand the diamond elementin order to bond them. The bonding layerincludes diffusion layers Sand Sin which one or two or more metals selected from a group consisting of Fe, Ni, Co, Ti, Zr, W, V, Nb, Ta, Cr, Mo, and Hf diffuses into at least one of the cemented carbide or the diamond.