Ferrofluid having improved oxidation resistance
US5879580A · kind A · utility
5Cited by
15References
46Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1996 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Dec 3, 2016 |
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 more than about 10% to about 400% by weight of an antioxidant based on the weight of the magnetic particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.