Investigating the presence of flaws or contamination

Introduced: January 1980

Title

Titles differ between systems:

IPC: Investigating the presence of flaws, defects or contamination

CPC: Investigating the presence of flaws or contamination

Full Title

Full titles differ between systems:

IPC:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light > Systems specially adapted for particular applications > Investigating the presence of flaws, defects or contamination

CPC:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light (G01N3/00 - G01N19/00 take precedence) > Systems specially adapted for particular applications > Investigating the presence of flaws or contamination

Of 9 combined children, 6 exist in both systems.

3 codes are CPC-only extensions.

4 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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G01N 21/8803 CPC only CPC only
G01N 21/8806 +9 CPC CPC only CPC only
G01N 21/8851 +4 CPC CPC only CPC only
G01N 21/89 in moving material, e.g. running paper or textiles (G01N21/90, G01N21/91, G01N21/94 take precedence) since 1980 +3 CPC IPC+CPC Available in IPC and CPC
G01N 21/90 in a container or its contents (G01N21/91 takes precedence) since 1980 +9 CPC IPC+CPC Available in IPC and CPC
G01N 21/91 using penetration of dyes, e.g. fluorescent ink since 1980 IPC+CPC Available in IPC and CPC
G01N 21/93 Detection standards; Calibrating since 2000 +2 CPC IPC+CPC Available in IPC and CPC
G01N 21/94 Investigating contamination, e.g. dust (G01N21/85 takes precedence) since 2000 +1 CPC IPC+CPC Available in IPC and CPC
G01N 21/95 characterised by the material or shape of the object to be examined (G01N21/89 - G01N21/91, G01N21/94 take precedence) since 2000 +7 CPC IPC+CPC Available in IPC and CPC