IPC Subgroup
C03B 23/22 Uniting glass lenses, e.g. forming bifocal lenses
Introduced: September 1968
Last revised: January 2006
Full Title
Re-forming shaped glass > Uniting glass pieces by fusing without substantial reshaping > Uniting glass lenses, e.g. forming bifocal lenses
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- GLASS; MINERAL OR SLAG WOOL
- Subclass:
- MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
Related Keywords
uniting glass LENS(ES)