DIFF Subgroup
C01B 17/62 Methods of preparing sulfites in general (particular individual sulfites, see the relevant groups of subclasses C01B - C01G, according to the cation)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Methods of preparing sulfites in general
CPC: Methods of preparing sulfites in general (particular individual sulfites, see the relevant groups of subclasses C01B - C01G, according to the cation)
Full Title
Full titles differ between systems:
IPC:
Sulfur; Compounds thereof > Methods of preparing sulfites in general
CPC:
Sulfur; Compounds thereof > Methods of preparing sulfites in general (particular individual sulfites, see the relevant groups of subclasses C01B - C01G, according to the cation)
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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