Pair of electrodes for detecting acidity or basicity of oil
US6549015B2 · kind B2 · utility
7Cited by
5References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 14, 2000 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Apr 7, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2876
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a pair of electrodes where a potential difference is changed in accordance with acidity or basicity of oil, a reference electrode is made of cobalt or a cobalt alloy, and a sensitive electrode is made of tungsten or a tungsten alloy. The sensitive electrode is used in combination with the reference electrode. Accordingly, it is possible to provide a pair of electrodes for detecting the acidity or the basicity of the oil which use a novel electrode material not hazardous to the environment and at the same time, suited for use in a semiconductor fabrication technique.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.