containing boron

Introduced: September 1968

Full Title

Glass compositions > Silica-free oxide glass compositions > containing boron

Of 3 combined children, 2 exist in both systems.

1 codes are CPC-only extensions.

IPC defines codes here since 1985.

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C03C 3/142 CPC only CPC only
C03C 3/145 containing aluminium or beryllium since 1985 IPC+CPC Available in IPC and CPC
C03C 3/15 containing rare earths since 1985 IPC+CPC Available in IPC and CPC