Process for removing undesirable substances from electrical devices
US4425949A · kind A · utility
38Cited by
12References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1982 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Feb 1, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F27/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The removal of undesirable substances such as water, PCB's and air from the internal components of electrical devices such as transformers and power capacitors is efficiently and effectively achieved by contacting, in the absence of air, the internal components of these various electrical devices with a heat-stable fluid material. The heat-stable fluid materials are preferably halogenated aliphatic hydrocarbons and most preferably perchloroethylene or FREON 113.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.