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PCE
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DIFF Subgroup
G01N 27/407

for investigating or analysing gases

Introduced: January 1990

Full Title

Full titles differ between systems:

IPC:

Investigating or analysing materials by the use of electric, electrochemical, or magnetic means > by investigating electrochemical variables; by using electrolysis or electrophoresis > Cells and electrode assemblies > Cells and probes with solid electrolytes > for investigating or analysing gases

CPC:

Investigating or analysing materials by the use of electric, electrochemical, or magnetic means (G01N3/00 – G01N25/00 take precedence; measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials G01R) > by investigating electrochemical variables; by using electrolysis or electrophoresis > Cells and electrode assemblies > Cells and probes with solid electrolytes > for investigating or analysing gases

CPC subdivides this area 4x more granularly than IPC with 5 additional codes.

5 codes are CPC-only extensions.

IPC defines codes here since 1990.

Child Classifications

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