Method of preparing X-ray contrast media containing ores of hafnium, tantalum and tungsten
US4079124A · kind A · utility
32Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1976 |
| Grant date | Mar 14, 1978 |
| Priority date | — |
| Expiry date | Apr 21, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K49/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method of preparing enteric X-ray contrast media particularly suited to the use of high energy X-ray sources are disclosed. The disclosed media comprise hafnium, tantalum, tungsten, oxides or insoluble salts thereof in purified form, mixtures thereof and, more particularly, partially purified ores containing one or more of them in combination with a suitable carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.