Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses (crimped or corrugated elements F28F1/06, F28F1/08)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses

CPC: Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses (crimped or corrugated elements F28F1/06, F28F1/08)

Full Title

Full titles differ between systems:

IPC:

Tubular elements; Assemblies of tubular elements > Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses

CPC:

Tubular elements; Assemblies of tubular elements (specially adapted for movement F28F5/00) > Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses (crimped or corrugated elements F28F1/06, F28F1/08)

Of 4 combined children, 3 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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F28F 1/105 CPC only CPC only
F28F 1/12 the means being only outside the tubular element +3 CPC IPC+CPC Available in IPC and CPC
F28F 1/40 the means being only inside the tubular element +1 CPC IPC+CPC Available in IPC and CPC
F28F 1/42 the means being both outside and inside the tubular element +3 CPC IPC+CPC Available in IPC and CPC