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:
Apr. 24, 2012
Filed:
Jul. 03, 2008
Osamu Yoshimoto, Inazawa, JP;
Kenji Nunome, Nagoya, JP;
Yoshihiro Nakai, Osaka, JP;
Taichiro Nishikawa, Osaka, JP;
Toru Tanji, Osaka, JP;
Kazuo Yamazaki, Osaka, JP;
Osamu Yoshimoto, Inazawa, JP;
Kenji Nunome, Nagoya, JP;
Yoshihiro Nakai, Osaka, JP;
Taichiro Nishikawa, Osaka, JP;
Toru Tanji, Osaka, JP;
Kazuo Yamazaki, Osaka, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A spark plug () includes: a center electrode (); and a ground electrode () which is to be exposed in a combustion chamber of an internal combustion engine and which forms a spark discharge gap with the center electrode (), wherein at least one of the center electrode () and the ground electrode () contains an electrode material whose principal component is Ni and in which an intermetallic compound is precipitated at least intergranularly and intragranularly.