Method of vacuum refining of glassy materials with selenium foaming agent
US4886539A · kind A · utility
62Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1989 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Apr 3, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a method of vacuum refining molten glass or the like, selenium is provided in the molten glass to serve as a foaming agent, which yields improved refining. Alternatively, colored glass compositions that include selenium as a colorant are refined at higher than normal pressures to retain selenium in the glass without sacrificing refining performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.