Ferrofluid having improved oxidation resistance
US5656196A · kind A · utility
4Cited by
12References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1994 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | Dec 15, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/445
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a ferrofluid composition having improved oxidation resistance, which contains a carrier liquid, magnetic particles in a stable colloidal suspension, and from about 5% to about 50% by weight of an antioxidant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.