Blanketing metals and alloys at elevated temperatures with gases having reduced global warming potential
US6521018B2 · kind B2 · utility
3Cited by
10References
30Claims
0Family size
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Key dates
| Filing date | Feb 9, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Feb 9, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B26/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An improved method of processing a nonferrous metal and alloys of said metal using a blanketing gas having a global warming potential is provided. The improvement involves reducing the global warming potential of the blanketing gas by blanketing the nonferrous metal and alloys with a gaseous mixture including at least one compound selected from the group consisting of COF2, CF3COF, (CF3)2CO, F3COF, F2C(OF)2, SO2F2, NF3, SO2ClF, SOF2, SOF4, NOF, F2 and SF4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.