PTC composition and over-current protection device containing the same
US9653192B2 · kind B2 · utility
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1References
13Claims
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Key dates
| Filing date | Jul 22, 2015 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Sep 22, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C7/008
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A PTC composition comprises crystalline polymer and conductive filler. The conductive filler comprises tungsten carbide powder dispersed in the crystalline polymer, and the tungsten carbide powder comprises impurity of less than 7% by weight. The impurity comprises the materials other than tungsten monocarbide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.