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IPC 7
  G01N - G01N 9/36  
G01N01100-G01N021958
  G01N 22/00 - G01N 27/92  

SECTION G – PHYSICS


G 01MEASURING (counting G06M); TESTING


G 01 NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (separating components of materials in general B01D, B01J, B03, B07; apparatus fully provided for in a single other subclass, see the relevant subclass, e.g. B01L; measuring or testing processes other than immunoassay, involving enzymes or micro-organisms C12M, C12Q; investigation of foundation soil in situ E02D 1/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N 11/00; sensing humidity changes for compensating measurements of other variables or for compensating readings of instruments for variations in humidity, see G01D or the relevant subclass for the variable measured; testing or determining the properties of structures G01M; measuring or investigating electric or magnetic properties of materials G01R; systems in general for determining distance, velocity or presence by use of propagation effects, e.g. Doppler effect, propagation time, of reflected or reradiated radio waves, analogous arrangements using other waves G01S; determining sensitivity, graininess, or density of photographic materials G03C 5/02; testing component parts of nuclear reactors G21C 17/00)


11/

00Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties

11/

02.by measuring flow of the material

11/

04..through a restricted passage, e.g. tube, aperture

11/

06...by timing the outflow of a known quantity

11/

08...by measuring pressure required to produce a known flow

11/

10.by moving a body within the material

11/

12..by measuring rising or falling speed of the body; by measuring penetration of wedged gauges (G01N 11/16 takes precedence)

11/

14..by using rotary bodies, e.g. vane (G01N 11/16 takes precedence)

11/

16..by measuring damping effect upon oscillatory body


13/

00Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects; Investigating or analysing surface structures in atomic ranges [1,7]

 

13/

02.Investigating surface tension of liquids

13/

04.Investigating osmotic effects

13/

10.Investigating or analysing surface structures in atomic ranges using scanning-probe techniques (by measuring secondary emission G01N 23/22; dimensional measurement using scanning-probe techniques G01B; details of scanning-probe apparatus, in general G12B 21/00) [7]

 

13/

12..using scanning tunnelling microscopy (STM) [7]

 

13/

14..using scanning near-field optical microscopy (SNOM) [7]

 

13/

16..using atomic force microscopy (AFM) [7]

 

13/

18..using scanning ion-conductance microscopy (SICM) [7]

 

13/

20..using scanning capacitance microscopy (SCM) [7]

 

13/

22..using magnetic force microscopy (MFM) [7]

 

13/

24..using scanning electrochemical microscopy [7]

 


15/

00Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials (identification of micro-organisms C12Q) [4]

15/

02.Investigating particle size or size distribution (G01N 15/04, G01N 15/10 take precedence; by measuring osmotic pressure G01N 7/10; by filtering B01D; by sifting B07B)  [4]

15/

04.Investigating sedimentation of particle suspensions

15/

05..in blood  [4]

15/

06.Investigating concentration of particle suspensions (G01N 15/04, G01N 15/10 take precedence; by weighing G01N 5/00)  [3]

15/

08.Investigating permeability, pore volume, or surface area of porous materials

15/

10.Investigating individual particles  [4]

15/

12..Coulter-counters  [4]

15/

14..Electro-optical investigation  [4]


17/

00Investigating resistance of materials to the weather, to corrosion, or to light

17/

02.Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement (G01N 17/04 takes precedence)  [5]

17/

04.Corrosion probes  [5]


19/

00Investigating materials by mechanical methods (G01N 3/00 to G01N 17/00 take precedence)

19/

02.Measuring coefficient of friction between materials

19/

04.Measuring adhesive force between materials, e.g. of sealing tape, of coating

19/

06.Investigating by removing material, e.g. spark-testing

19/

08.Detecting presence of flaws or irregularities (measuring roughness or irregularity of surfaces G01B 5/28)

19/

10.Measuring moisture content, e.g. by measuring change in length of hygroscopic filament; Hygrometers


21/

00Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light (G01N 3/00 to G01N 19/00 take precedence; measuring stress in general G01L 1/00; optical elements of measuring instruments G02B; image analysis by data processing G06T)

Note

 This group does not cover the investigation of spectral properties of light per se, or measurements of the properties of materials where spectral properties of light are sensed and primary emphasis is placed on creating, detecting or analysing the spectrum providing that the properties of the materials to be investigated are of minor importance (see also Note (4) after the title of class G01). Those subjects are covered by group G01J 3/00. [7]

21/

01.Arrangements or apparatus for facilitating the optical investigation  [3]

21/

03..Cuvette constructions  [3]

21/

05...Flow-through cuvettes (G01N 21/09 takes precedence; handling fluid samples G01N 1/10)  [3]

21/

07...Centrifugal type cuvettes (G01N 21/09 takes precedence; centrifuges B04B)  [3]

21/

09...adapted to resist hostile environments or corrosive or abrasive materials  [3]

21/

11..Filling or emptying of cuvettes  [3]

21/

13..Moving of cuvettes or solid samples to or from the investigating station  [3]

21/

15..Preventing contamination of the components of the optical system or obstruction of the light path  [3]

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 G01N 21/63)  [3]

21/

19..Dichroism  [3]

21/

21..Polarisation-affecting properties (G01N 21/19 takes precedence)  [3]

21/

23...Bi-refringence  [3]

21/

25..Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands  [3]

21/

27...using photo-electric detection (G01N 21/31 takes precedence)  [3]

21/

29...using visual detection (G01N 21/31 takes precedence)  [3]

21/

31...Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry  [3]

21/

33....using ultra-violet light (G01N 21/39 takes precedence)  [3]

21/

35....using infra-red light (G01N 21/39 takes precedence)  [3]

21/

37.....using pneumatic detection  [3]

21/

39....using tunable lasers  [3]

21/

41..Refractivity; Phase-affecting properties, e.g. optical path length (G01N 21/21 takes precedence)  [3]

21/

43...by measuring critical angle  [3]

21/

45...using interferometric methods; using Schlieren methods  [3]

21/

47..Scattering, i.e. diffuse reflection (G01N 21/25, G01N 21/41 take precedence)  [3]

21/

49...within a body or fluid  [3]

21/

51....inside a container, e.g. in an ampoule (G01N 21/53 takes precedence; checking containers for cleanliness B08B 9/46)  [3]

21/

53....within a flowing fluid, e.g. smoke (alarm devices actuated by smoke G08B 17/10)  [3]

21/

55..Specular reflectivity  [3]

21/

57...Measuring gloss  [3]

21/

59..Transmissivity (G01N 21/25 takes precedence)  [3]

21/

61...Non-dispersive gas analysers  [3]

21/

62.Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light  [3]

21/

63..optically excited  [3]

21/

64...Fluorescence; Phosphorescence  [3]

21/

65...Raman scattering  [3]

21/

66..electrically excited, e.g. electroluminescence  [3]

21/

67...using electric arcs or discharges (spark gaps H01T)  [3]

21/

68...using high frequency electric fields  [3]

21/

69...specially adapted for fluids  [3]

21/

70..mechanically excited, e.g. triboluminescence  [3]

21/

71..thermally excited  [3]

21/

72...using flame burners  [3]

21/

73...using plasma burners or torches  [3]

21/

74...using flameless atomising, e.g. graphite furnaces  [3]

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 G01N 21/72, G01N 21/73)  [3]

21/

76..Chemiluminescence; Bioluminescence  [3]

21/

77..by observing the effect on a chemical indicator  [3]

21/

78...producing a change of colour  [3]

21/

79....Photometric titration  [3]

21/

80....Indicating pH value  [3]

21/

81....Indicating humidity  [3]

21/

82...producing a precipitate or turbidity  [3]

21/

83....Turbidimetric titration  [3]

21/

84.Systems specially adapted for particular applications  [3]

21/

85..Investigating moving fluids or granular solids  [3]

21/

86..Investigating moving sheets (G01N 21/89 takes precedence)  [3]

21/

87..Investigating jewels (G01N 21/88 takes precedence)  [3]

21/

88..Investigating the presence of flaws, defects or contamination  [3]

21/

89...in moving material, e.g. paper, textiles (G01N 21/90, G01N 21/91, G01N 21/94 take precedence) [3,7]

21/

892....characterised by the flaw, defect or object feature examined [7]

 

21/

894.....Pinholes [7]

 

21/

896.....Optical defects in or on transparent materials, e.g. distortion, surface flaws [7]

 

21/

898.....Irregularities in textured or patterned surfaces, e.g. textiles, wood [7]

 

21/

90...in a container or its contents (G01N 21/91 takes precedence)  [3]

21/

91...using penetration of dyes, e.g. fluorescent ink  [3]

21/

93...Detection standards; Calibrating [7]

 

21/

94...Investigating contamination, e.g. dust (G01N 21/85 takes precedence) [7]

 

21/

95...characterised by the material or shape of the object to be examined (G01N 21/89 to G01N 21/91, G01N 21/94 take precedence) [7]

 

21/

952....Inspecting the exterior surface of cylindrical bodies or wires (G01N 21/956 takes precedence) [7]

 

21/

954....Inspecting the inner surface of hollow bodies, e.g. bores [7]

 

21/

956....Inspecting patterns on the surface of objects (contactless testing of electronic circuits G01R 31/308; testing currency G07D) [7]

 

21/

958....Inspecting transparent materials [7]

 

  G01N - G01N 9/36    G01N 22/00 - G01N 27/92  
 

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