Superparamagnetic liquids and methods of making superparamagnetic liquids
US4938886A · kind A · utility
24Cited by
23References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Sep 21, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/442
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Superparamagnetic liquids comprising: (A) magnetic particles in stable colloidal suspension; (B) an A-X-B dispersant wherein A is derived from a non-ionic surface active agent, B is a carboxylic acid group and X is a connecting group between A and B; and (C) a carrier liquid which is a thermodynamically good solvent for A but which does not form a stable superparamagnetic liquid with magnetic particles coated only with oleic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.