within a body or fluid

Introduced: January 1980

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 in which incident light is modified in accordance with the properties of the material investigated > Scattering, i.e. diffuse reflection > within a body or fluid

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 in which incident light is modified in accordance with the properties of the material investigated (where the material investigated is optically excited causing a change in wavelength of the incident light G01N21/63) > Scattering, i.e. diffuse reflection (G01N21/25, G01N21/41 take precedence ) > within a body or fluid

Of 3 combined children, 2 exist in both systems.

1 codes are CPC-only extensions.

Note: 1 CPC extensions are marked as secondary classification only.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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G01N 2021/495 2nd only CPC only CPC only
G01N 21/51 inside a container, e.g. in an ampoule (G01N21/53 takes precedence) since 1980 +2 CPC IPC+CPC Available in IPC and CPC
G01N 21/53 within a flowing fluid, e.g. smoke since 1980 +3 CPC IPC+CPC Available in IPC and CPC