DIFF Subgroup
F27B 3/04 of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces > of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
CPC:
Hearth-type furnaces, e.g. of reverberatory type (F27B9/00, F27B11/00, F27B13/00, F27B14/00, F27B15/00, F27B21/00 take precedence); Electric arc furnaces > of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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