DIFF Subgroup
C03C 3/095 containing rare earths
Introduced: January 1985
Full Title
Full titles differ between systems:
IPC:
Glass compositions > containing silica > with 40% to 90% silica by weight > containing rare earths
CPC:
Glass compositions > containing silica > with 40% to 90% silica, by weight > containing rare earths
No child classifications to compare. This is a leaf node in both IPC and CPC.