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PCE
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DIFF Subgroup
F28D 7/02

the conduits being helically coiled (F28D7/10 takes precedence )

Introduced: September 1968

Title

Titles differ between systems:

IPC: the conduits being helically coiled

CPC: the conduits being helically coiled (F28D7/10 takes precedence )

Full Title

Full titles differ between systems:

IPC:

Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall > the conduits being helically coiled

CPC:

Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall > the conduits being helically coiled (F28D7/10 takes precedence )

Of 4 combined children, 0 exist in both systems.

4 codes are CPC-only extensions.

Child Classifications

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