Spark plug
US6750598B2 · kind B2 · utility
13Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 2003 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Feb 19, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/39
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A noble metallic tip of a ground electrode protrudes from an opposed surface of the ground electrode by a protrusion amount ‘t’ not less than 0.3 mm. The noble metallic tip of the ground electrode possesses excellent oxidative and volatile resistance compared with a noble metallic tip of a center electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.