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US3973069A · kind A · utility
0Cited by
11References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1975 |
| Grant date | Aug 3, 1976 |
| Priority date | — |
| Expiry date | Apr 3, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31627
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In the coloring of bodies of glass by diffusion of coloring ions from a treatment medium into surface layers thereof, the repeatability of the resulting coloration is improved by controlling not only the treatment temperature and composition of the medium and the treatment time, but also by controlling the electrical potential within the medium between a pair of electrodes in contact therewith. Preferably, for electrodes of specified composition and structure, this potential is maintained at a value between -600 mV and +300 mV.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.