C03C 21/001 — IPC vs CPC Diff | Patent Classification Explorer

DIFF Subgroup

C03C 21/001

Full Title

Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface

Of 3 combined children, 0 exist in both systems.

3 codes are CPC-only extensions.

This code exists only in CPC.

Diff view requires codes present in both systems.