Process for reducing the average particle size of ammonium paratungstate powders
US5578285A · kind A · utility
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3References
19Claims
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Key dates
| Filing date | Dec 20, 1994 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Dec 20, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01G41/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for reducing the average particle size of an ammonium paratungstate powder having the steps of heating the ammonium paratungstate powder at a temperature of between about 110.degree. C. to about 205.degree. C. for a time sufficient to reduce the average particle size of the ammonium paratungstate powder by at least 20 percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.