DIFF Subgroup
C01B 17/92 Recovery from acid tar or the like
Introduced: September 1968
Full Title
Sulfur; Compounds thereof > Sulfur trioxide; Sulfuric acid > Separation; Purification > Recovery from acid tar or the like
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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