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. 30, 2013
Filed:
Mar. 25, 2009
Takashi Watanabe, Kagoshima, JP;
Tatsuyuki Nakaoka, Kagoshima, JP;
Takero Fukudome, Kagoshima, JP;
Shuichi Tateno, Kagoshima, JP;
Hiroshi Yoshimitsu, Kagoshima, JP;
Takashi Watanabe, Kagoshima, JP;
Tatsuyuki Nakaoka, Kagoshima, JP;
Takero Fukudome, Kagoshima, JP;
Shuichi Tateno, Kagoshima, JP;
Hiroshi Yoshimitsu, Kagoshima, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
A silicon nitride cutting tool comprising a sintered product is disclosed. The sintered product comprises silicon nitride, at least one rare earth element compound, and a magnesium compound. The silicon nitride cutting tool further comprises a surface region and an inside region comprising the sintered product with varying content ratios of component compounds to provide enhanced wear and fracture resistance.