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:
Oct. 20, 2020
Filed:
Sep. 16, 2019
Applicant:
Denso Corporation, Kariya, Aichi-pref., JP;
Inventor:
Tomoyuki Watanabe, Kariya, JP;
Assignee:
DENSO CORPORATION, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T 13/41 (2006.01); H01T 1/16 (2006.01); H01C 7/108 (2006.01); H01T 13/34 (2006.01);
U.S. Cl.
CPC ...
H01T 13/41 (2013.01); H01C 7/108 (2013.01); H01T 1/16 (2013.01); H01T 13/34 (2013.01);
Abstract
A spark plug which is capable of further improving load life performance and a resistor material for a spark plug are provided. A spark plug includes a center electrode, a terminal fitting, and a resistor disposed between the center electrode and the terminal fitting. The resistor contains glass, a zirconia-based material and an electrically conducting material. The zirconia-based material contains at least stabilized zirconia.