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. 23, 2021
Filed:
Sep. 03, 2019
Ngk Spark Plug Co., Ltd., Nagoya, JP;
Daisuke Sumoyama, Nagoya, JP;
Kazuki Ito, Nagoya, JP;
NGK Spark Plug Co., Ltd., Nagoya, JP;
Abstract
In a spark plug, a base material contains 50 mass % or more of Ni, 8 mass % or more and 40 mass % or less of Cr, 0.01 mass % or more and 2 mass % or less of Si, 0.01 mass % or more and 2 mass % or less of Al, 0.01 mass % or more and 2 mass % or less of Mn, 0.01 mass % or more and 0.1 mass % or less of C, and 0.001 mass % or more and 5 mass % or less of Fe. A discharge member contains at least Pt of a P group (Pt, Rh, Ir, and Ru) and Ni. The atomic concentration K of the P group of the discharge member, the atomic concentration L of the P group of the base material, the atomic concentration M of Ni of the discharge member, and the atomic concentration N of Ni of the base material satisfy (K+L)/(M+N)≤1.14.