DIFF Subgroup
B28B 7/40 characterised by means for modifying the properties of the moulding material
Introduced: January 1990
Full Title
Full titles differ between systems:
IPC:
Moulds; Cores; Mandrels > characterised by means for modifying the properties of the moulding material
CPC:
Moulds; Cores; Mandrels (specially adapted for the production of the tubular articles B28B21/00; ) > characterised by means for modifying the properties of the moulding material
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
IPC defines codes here since 1990.
Child Classifications
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- B28B 7/44 for treating with gases or degassing, e.g. for de-aerating since 1990 IPC+CPC Available in IPC and CPC