DIFF Subgroup
C21D 1/19 by interrupted quenching
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Hardening; Quenching with or without subsequent tempering > by interrupted quenching
CPC:
General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Hardening (C21D1/02 takes precedence); Quenching with or without subsequent tempering (quenching devices C21D1/62) > by interrupted quenching
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
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