F25J 3/02 by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream (F25J3/08 takes precedence )
Introduced: September 1968
Title
Titles differ between systems:
IPC: by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
CPC: by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream (F25J3/08 takes precedence )
Full Title
Full titles differ between systems:
Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification > by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification > by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream (F25J3/08 takes precedence )
CPC subdivides this area 4x more granularly than IPC with 3 additional codes.
3 codes are CPC-only extensions.
Child Classifications
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