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PCE
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DIFF Subgroup
C21D 1/44

in heat-treatment baths

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Methods of heating > in heat-treatment baths

CPC:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Methods of heating (C21D1/06 takes precedence) > in heat-treatment baths

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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  • C21D 1/46 Salt baths IPC+CPC Available in IPC and CPC
  • C21D 1/48 Metal baths IPC+CPC Available in IPC and CPC
  • C21D 1/50 Oil baths IPC+CPC Available in IPC and CPC