DIFF Subgroup
C03C 17/22 with other inorganic material (C03C17/34, C03C17/44 take precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: with other inorganic material
CPC: with other inorganic material (C03C17/34, C03C17/44 take precedence)
Full Title
Full titles differ between systems:
IPC:
Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating > with other inorganic material
CPC:
Surface treatment of glass, not in the form of fibres or filaments, by coating (optical coatings of optical elements G02B1/10) > with other inorganic material (C03C17/34, C03C17/44 take precedence)
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1980.
Child Classifications
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