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:
Jan. 15, 2019
Filed:
Jun. 08, 2016
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Kaori Suzuki, Nagoya, JP;
Tomoaki Kato, Nagoya, JP;
NGK SPARK PLUG CO., LTD., Nagoya-shi, Aichi, JP;
Abstract
A spark plug wherein when a discharge tip is viewed from a direction of an axial line, a melted portion is formed in at least a region on a second-end side of an electrode base material from a center of a discharge layer, and wherein in a section that includes a center line along a longitudinal direction of a ground electrode and that is parallel to an axial line, a proportion of a length of the melted portion along the longitudinal direction to a length of the discharge tip along the longitudinal direction of the electrode base material is greater than or equal to 76.2%, with the length of the melted portion along the longitudinal direction being within a range in which the discharge tip exists along the longitudinal direction.