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:
Mar. 04, 2003
Filed:
Sep. 01, 2000
Yasuyuki Kanada, Itami, JP;
Yoshihiro Kuroda, Itami, JP;
Noboru Yamazaki, Itami, JP;
Yasunobu Ogata, Itami, JP;
Kunihiro Tomita, Itami, JP;
Tetsuo Nakai, Itami, JP;
Makoto Abe, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A diamond sintered body tool ( ) having superior adhesion resistance, chipping resistance and high strength includes a tool base material ( ) including a diamond sintered body, and a surface layer ( ) formed on a surface of the tool base material ( ). The surface layer ( ) includes at least one of silicon, a silicon oxide, a silicon carbide, a silicon nitride and a solid solution thereof. The tool base material ( ) has an inner portion ( ) including a first content of an iron group metal, and a surface portion ( ) surrounding the inner portion ( ) and including a second content of the iron group metal lower than the first content.