Fire-resistant glazing
US5990023A · kind A · utility
7Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1998 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Mar 11, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C23/007
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Use is made, for the manufacture of fire-resistant glazings of the G fire-resistance classes, comprising panes made of glass toughened by the thermal route by means of a conventional toughening plant and possessing safety glass properties, of glasses which exhibit a thermal expansion coefficient .alpha..sub.20-300 of between 6 and 8.5.times.10.sup.-6 K.sup.-1, a thermal stress factor .phi. of between 0.5 and 0.8N/(mm.sup.2.K), a softening point of between 750 and 830.degree. C. and a transformation point of at the very most 1190.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.