Stain-resistant glass making method
US6349569B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1997 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Mar 18, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C23/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a method for making a stain-resistant float glass and an apparatus for carrying out such a method. In keeping with this method, SO3 is applied to the upper surface of float glass in an amount efficacious to materially reduce staining of the upper surface of the glass. Optimally, SO3 gas can be applied directly onto the upper surface of the glass. An apparatus of the invention generally includes a downwardly open hood positioned above the upper surface of the glass and having walls defining an enclosure. SO3 gas (either as such or as a reactive mixture of S02 gas and an oxygen-containing gas) is delivered through a delivery tube to the enclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.