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:
Dec. 11, 1984
Filed:
Sep. 29, 1982
Applicant:
Inventors:
Ryoji Kondo, Okazaki, JP;
Kanji Higuchi, Hekinan, JP;
Kozo Takamura, Nagoya, JP;
Yasuyuki Sato, Kasugai, JP;
Minoru Nagai, Kariya, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01T / ;
U.S. Cl.
CPC ...
313141 ; 313142 ;
Abstract
An ignition plug of extended durability which reduces crack formation in noble metal layer on the center electrode and the ground electrode by joining a noblemental layer consisting of 85 to 70% by weight of Pt and 15 to 30% by weight of Ir to the spark discharge portion of the center electrode and also another noble metal layer consisting of 90 to 70% by weight of Pt and 10 to 30% by weight of Ni to the spark discharge portion of the ground electrode.