Patent · US Expired

Lead-free glasses

US6184166A · kind A · utility

4Cited by
7References
12Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 16, 1999
Grant dateFeb 6, 2001
Priority date
Expiry dateJul 16, 2019

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC03C4/0028
  • WIPO fieldMaterials, metallurgy
  • WIPO sectorChemistry

Abstract

This invention relates to lead-free silicate glasses that find use in producing fine crystal glassware and in laminated ware applications. The glasses consist essentially, in weight percent, of: SiO.sub.2 52-66 ZnO 15-30 Al.sub.2 O.sub.3 0-4 BaO 0-7 Li.sub.2 O 0-4 MgO + CaO + SrO 0-4 Na.sub.2 O 3-16 ZrO.sub.2 0-4 K.sub.2 O 0-12 B.sub.2 O.sub.3 0-4.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.