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PCE
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DIFF Subgroup
F25D 3/10

using liquefied gases, e.g. liquid air

Introduced: September 1968

Full Title

Devices using other cold materials; Devices using cold-storage bodies > using liquefied gases, e.g. liquid air

CPC subdivides this area 4x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

IPC defines codes here since 1985.

Child Classifications

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  • F25D 3/102 CPC only CPC only
  • F25D 3/105 CPC only CPC only
  • F25D 3/107 CPC only CPC only
  • F25D 3/11 with conveyors carrying articles to be cooled through the cooling space since 1985 IPC+CPC Available in IPC and CPC