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:
Aug. 05, 2025
Filed:
Aug. 05, 2024
Federal-mogul Ignition Llc, Northville, MI (US);
Shuwei Ma, Ann Arbor, MI (US);
Nicholas Ritsema, Brighton, MI (US);
FEDERAL-MOGUL IGNITION LLC, Northville, MI (US);
Abstract
A spark plug electrode made from a ruthenium-based material that includes one or more of the following characteristics: an equiaxed grain structure, a grain structure with an average grain size that is less than or equal to 50 μm, a grain structure with an average porosity that is less than or equal to 2%, and/or a grain structure with an average non-homogeneity ratio that is less than or equal to 6%. In one example, the ruthenium-based material is a binary alloy that includes rhodium from 1 wt % to 15 wt %, inclusive, and the balance ruthenium. In a different example, the ruthenium-based material is a ternary alloy that includes rhodium from 1 wt % to 15 wt %, inclusive, rhenium from 0.5 wt % to 5 wt %, inclusive, and the balance ruthenium. A powder metallurgy method is also provided for manufacturing the spark plug electrode.