G01N 21/00 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)
Introduced: September 1968
Title
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
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)
Full Title
Full titles differ between systems:
Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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)
IPC and CPC are identically structured here. All 5 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1980.
Child Classifications
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- G01N 21/01 Arrangements or apparatus for facilitating the optical investigation since 1980 +5 CPC IPC+CPC Available in IPC and CPC
- G01N 21/17 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) since 1980 +13 CPC IPC+CPC Available in IPC and CPC
- G01N 21/62 Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light since 1980 +1 CPC IPC+CPC Available in IPC and CPC
- G01N 21/75 Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated (systems in which material is burnt in a flame or plasma G01N21/72, G01N21/73) since 1980 +6 CPC IPC+CPC Available in IPC and CPC
- G01N 21/84 Systems specially adapted for particular applications since 1980 +10 CPC IPC+CPC Available in IPC and CPC