Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall

Introduced: September 1968

CPC subdivides this area 5x more granularly than IPC with 8 additional codes.

8 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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F28D 9/0006 CPC only CPC only
F28D 9/0012 +1 CPC CPC only CPC only
F28D 9/0025 CPC only CPC only
F28D 9/0031 +2 CPC CPC only CPC only
F28D 9/0062 +2 CPC CPC only CPC only
F28D 9/0081 CPC only CPC only
F28D 9/0087 CPC only CPC only
F28D 9/0093 CPC only CPC only
F28D 9/02 the heat-exchange media travelling at an angle to one another (F28D9/04 takes precedence) IPC+CPC Available in IPC and CPC
F28D 9/04 the conduits being formed by spirally-wound plates or laminae IPC+CPC Available in IPC and CPC