Fused quartz tubing for pharmaceutical packaging and methods for making the same
US10384972B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2014 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Feb 6, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2203/52
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for forming high purity silica articles. The high purity silica articles can be particularly suitable for forming packaging such as packaging for pharmaceutical applications. The method for forming high purity silica articles can comprise, in one embodiment, (a) forming a fused quartz melt from a SiO2 raw material; (b) forming a quartz tube from the fused quartz melt; (c) treating the quartz tube with an acid composition; (d) heat treating the quartz tube subsequent to treating with the acid composition; and (e) optionally treating the quartz article with an acid composition subsequent to the heat treating operation. The method can enhance the purity of silica glass articles and products made therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.