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:
Jul. 29, 2008
Filed:
Oct. 08, 2004
Hitoshi Sumiya, Itami, JP;
Yutaka Kobayashi, Itami, JP;
Katsuyuki Kawate, Itami, JP;
Takeru Nakashima, Itami, JP;
Hitoshi Sumiya, Itami, JP;
Yutaka Kobayashi, Itami, JP;
Katsuyuki Kawate, Itami, JP;
Takeru Nakashima, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka-shi, JP;
Sumitomo Electric Hardmetal Corp., Itami-shi, JP;
Abstract
Various types of diamond tools are provided by utilizing the fact that a synthetic single crystal diamond for use in a tool having a nitrogen content of 3 ppm or less exhibits an enhanced hardness in a (100) plane in a <111> direction and simultaneously the reduction in defects. The above synthetic single crystal diamond is synthesized by the temperature difference method under an ultra high pressure at high temperature and contains, in its crystals, nickel introduced by atomic substitution or boron and nickel introduced by atomic substitution.