DIFF Subgroup
A24B 15/36 containing a heterocyclic ring
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 chemical substances > by organic substances > containing a heterocyclic ring
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 chemical substances > by organic substances > containing a heterocyclic ring
Of 3 combined children, 2 exist in both systems.
1 codes are CPC-only extensions.
2 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1980.
Child Classifications
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- A24B 15/40 having only oxygen or sulfur as hetero atoms since 1980 +1 CPC IPC+CPC Available in IPC and CPC