Method for reducing oxygen component and carbon component in fluoride
US7033563B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Feb 7, 2002 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Jan 13, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/19
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for reducing oxygen and carbon components in high-purity fluoride such as calcium fluoride and barium fluoride (a high-purity fluoride that is not limited to calcium fluoride and barium fluoride), or in rare-earth fluorides such as ytterbium fluoride and cerium fluoride used for an optical fiber, a coating material, and so on. The oxygen and carbon components contained in the high-purity fluoride are reduced by a fluorine gas treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.