G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
Introduced: September 1968
Description
G01N encompasses methods and apparatus for determining chemical and physical properties of materials through various analytical techniques. This subclass covers a broad range of measurement and testing technologies, including spectroscopy, chromatography, thermal analysis, microscopy, and electrochemical analysis. Applications span materials characterization, quality control, environmental monitoring, clinical diagnostics, and industrial process control across diverse materials including solids, liquids, gases, and biological samples. Adjacent classes handle more specialized domains such as G01R (electrical/magnetic measurements) and G01M (mechanical property testing), while G01N focuses on compositional and structural analysis rather than dimensional or mechanical measurements.
Title
Titles differ between systems:
IPC: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
CPC: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
Full Title
Full titles differ between systems:
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
CPC subdivides this area 2x more granularly than IPC with 28 additional codes.
28 codes are CPC-only extensions.
Note: 28 CPC extensions are marked as secondary classification only.
16 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G01N 11/00 Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties +4 CPC IPC+CPC Available in IPC and CPC
- G01N 13/00 Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects (scanning-probe techniques or apparatus G01Q) +2 CPC IPC+CPC Available in IPC and CPC
- G01N 15/00 Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials +9 CPC IPC+CPC Available in IPC and CPC
- G01N 17/00 Investigating resistance of materials to the weather, to corrosion, or to light +4 CPC IPC+CPC Available in IPC and CPC
- G01N 19/00 Investigating materials by mechanical methods (G01N3/00 - G01N17/00 take precedence) IPC+CPC Available in IPC and CPC
- 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) IPC+CPC Available in IPC and CPC
- G01N 22/00 Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more (G01N3/00 - G01N17/00, G01N24/00 take precedence) since 1980 +1 CPC IPC+CPC Available in IPC and CPC
- G01N 2203/00 Investigating strength properties of solid materials by application of mechanical stress 2nd only +6 CPC CPC only CPC only
- G01N 2223/00 Investigating materials by wave or particle radiation 2nd only +11 CPC CPC only CPC only
- G01N 23/00 Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 +1 CPC IPC+CPC Available in IPC and CPC
- G01N 2333/00 Assays involving biological materials from specific organisms or of a specific nature 2nd only +13 CPC CPC only CPC only
- G01N 24/00 Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects since 1980 +4 CPC IPC+CPC Available in IPC and CPC
- G01N 2400/00 Assays, e.g. immunoassays or enzyme assays, involving carbohydrates 2nd only +2 CPC CPC only CPC only
- G01N 2405/00 Assays, e.g. immunoassays or enzyme assays, involving lipids 2nd only +3 CPC CPC only CPC only
- G01N 2407/00 Assays, e.g. immunoassays or enzyme assays, involving terpenes 2nd only +1 CPC CPC only CPC only
- G01N 2410/00 Assays, e.g. immunoassays or enzyme assays, involving peptides of less than 20 animo acids 2nd only +5 CPC CPC only CPC only
- G01N 2415/00 Assays, e.g. immunoassays or enzyme assays, involving penicillins or cephalosporins 2nd only CPC only CPC only