Process for the precision molding of glass articles
US4747864A · kind A · utility
32Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1986 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Jun 19, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2215/32
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Glass products such as glass lens elements are formed by an improved direct molding process at glass viscosities in the range of 10.sup.8 -10.sup.12 poises. Selected moldable alkali aluminofluorophosphate optical glasses are pressed to an optical surface finish in air utilizing an optically smooth titanium nitride molding surface, the surface being provided, for example, as a surface coating on a stainless steel mold or on a nickel chromium alloy mold supporting an electroless nickel base coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.