Glass composition and method for producing glass article
US7823416B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2004 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Jul 2, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2203/54
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The glass composition of the present invention is an inorganic glass composition in which the volume ratio of helium with a mass number of 3 to helium with a mass number of 4, namely 3He/4He in the glass (0° C., 1 atm) is smaller than the volume ratio 3He/4He in the atmosphere. The method of producing a glass article of the present invention includes the steps of: melting a glass raw material by heating; homogenizing molten glass; forming the molten glass into a desired shape; and cooling the shaped glass to room temperature, in which helium with a certain mass ratio is dissolved in the glass material so that the glass article of the present invention is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.