DIFF Subgroup
C08J 9/40 Impregnation
Introduced: July 1974
Full Title
Full titles differ between systems:
IPC:
Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof > After-treatment > Impregnation
CPC:
Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof (mechanical aspects of shaping of plastics or substances in a plastic state for the production of porous or cellular articles B29C) > After-treatment (C08J9/22 takes precedence) > Impregnation
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1974.
Child Classifications
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