Process for marking a glass object and article
US4896074A · kind A · utility
3Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1988 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Dec 27, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/131
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process of manufacture and an article produced by the process in the form of a lead glass substrate. The substrate is discretely marked during the manufacturing process by directing a flame upon it that is deficient in oxygen to provide a darkened or black marking in the glass surface. The invention is especially useful for marking electric lamps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.