DIFF Subgroup
A24B 15/24 by extraction; Tobacco extracts
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form > Treatment of tobacco products or tobacco substitutes > by extraction; Tobacco extracts
CPC:
Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form (A24B3/00 takes precedence) > Treatment of tobacco products or tobacco substitutes > by extraction; Tobacco extracts
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1980.
Child Classifications
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