Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
C21D 1/56

characterised by the quenching agents

Introduced: September 1968

Full Title

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > characterised by the quenching agents

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

Child Classifications

Navigate with arrow keys, Enter to open

  • C21D 1/58 Oils IPC+CPC Available in IPC and CPC
  • C21D 1/60 Aqueous agents IPC+CPC Available in IPC and CPC
  • C21D 1/607 Molten salts since 1980 IPC+CPC Available in IPC and CPC
  • C21D 1/613 Gases; Liquefied or solidified normally gaseous material since 1980 IPC+CPC Available in IPC and CPC