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:
Nov. 02, 1999
Filed:
May. 13, 1997
Hironori Osamura, Chiryu, JP;
Nobuo Abe, Yokkaichi, JP;
Denso Corporation, Kariya, JP;
Abstract
To provide a spark plug having an improved consumption resistance and producible through a simple process, a spark plug comprises a noble metal chip composed of an Ir alloy material and disposed on at least one of the tip of the center electrode and the facing portion of the ground electrode, the Ir alloy material is composed of Ir and a metal having a higher oxidation resistance than Ir and forming solid solution with Ir at all proportions to prevent oxidation evaporation of Ir, and the chip is produced by elongating an ingot of the Ir alloy material through hot forging to a bar having a fine fiber texture to prevent surface cracking during elongation, followed by hot rolling, hot wire drawing and cutting to the chip length.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile