| IPC 7 English version |
| G01N-G01N00936 |
G01N 11/00 - G01N 21/958  |
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| SECTION G – PHYSICS |
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| G 01 | MEASURING (counting G06M); TESTING |
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| G 01 N | INVESTIGATING 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) |
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| Notes |
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| (1) | In this subclass, the following terms are used with the meanings indicated: |
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| – | "investigating" means testing or determining; |
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| – | "materials" includes solid, liquid or gaseous media, e.g. the atmosphere. |
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| (2) | Attention is drawn to the Notes following the title of class G01. |
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| (3) | Investigating the properties of materials, specially adapted for use in processes covered by subclass B23K, is classified in group B23K 31/12. [5] |
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| Subclass Index |
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| SAMPLING, PREPARING |
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| INVESTIGATING OR ANALYSING CHARACTERISED BY THE PROPERTY INVESTIGATED |
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| Mechanical strength; density; flow |
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| Surface or boundary effects; characteristics of particles, permeability; friction, adhesive force |
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| Resistance to atmospheric agents |
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| INVESTIGATING OR ANALYSING CHARACTERISED BY THE METHOD USED |
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| Weighing; measuring pressure or volume of gas; mechanical |
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| Optical; by microwaves; by radiation |
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| Magnetic resonance or other spin effects |
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| Thermal; electric, electrochemical, magnetic; sonic |
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| By separation into components; by the use of the chemical methods |
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| OTHER INVESTIGATING OR ANALYSING CHARACTERISED BY THE MATERIAL INVESTIGATED |
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| Immunoassay |
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| AUTOMATIC ANALYSIS |
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| DETAILS NOT COVERED BY THE PRECEDING GROUPS |
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1/ | 00 | Sampling; Preparing specimens for investigation (handling materials for automatic analysis G01N 35/00) |
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1/ | 02 | . | Devices for withdrawing samples (for medical or veterinary purposes A61; obtaining samples of soil or well fluids E21B 49/00) |
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1/ | 04 | . | . | in the solid state, e.g. by cutting |
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1/ | 06 | . | . | . | providing a thin slice, e.g. microtome |
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1/ | 08 | . | . | . | involving an extracting tool, e.g. core bit |
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1/ | 10 | . | . | in the liquid or fluent state |
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1/ | 12 | . | . | . | Dippers; Dredgers (suction dredgers E02F 3/88) [5] |
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1/ | 14 | . | . | . | Suction devices, e.g. pumps; Ejector devices |
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1/ | 16 | . | . | . | with provision for intake at several levels (G01N 1/12, G01N 1/14 take precedence) |
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1/ | 18 | . | . | . | with provision for splitting samples into portions (G01N 1/12, G01N 1/14 take precedence; fraction-collection apparatus for chromatography B01D 15/08) |
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1/ | 20 | . | . | . | for flowing or falling materials (G01N 1/12, G01N 1/14 take precedence) |
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1/ | 22 | . | . | in the gaseous state |
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1/ | 24 | . | . | . | Suction devices |
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1/ | 26 | . | . | . | with provision for intake from several spaces |
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1/ | 28 | . | Preparing specimens for investigation (mounting specimens on microscopic slides G02B 21/34; means for supporting the objects or the materials to be analysed in electron microscopes H01J 37/20) |
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1/ | 30 | . | . | Staining; Impregnating |
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1/ | 31 | . | . | . | Apparatus therefor [6] |
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1/ | 32 | . | . | Polishing; Etching |
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1/ | 34 | . | . | Purifying; Cleaning |
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1/ | 36 | . | . | Embedding or analogous mounting of samples [6] |
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1/ | 38 | . | . | Diluting, dispersing or mixing samples [6] |
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1/ | 40 | . | . | Concentrating samples [6] |
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1/ | 42 | . | . | Low-temperature sample treatment, e.g. cryofixation [6] |
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1/ | 44 | . | . | Sample treatment involving radiation, e.g. heat [6] |
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3/ | 00 | Investigating strength properties of solid materials by application of mechanical stress (strain gauges G01B; measuring stress in general G01L 1/00) |
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| Note |
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| This group covers the stressing of materials not only below but also beyond the elastic limit, e.g. until breaking occurs. |
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3/ | 02 | . | Details |
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3/ | 04 | . | . | Chucks |
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3/ | 06 | . | . | Special adaptations of indicating or recording means |
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3/ | 08 | . | by applying steady tensile or compressive forces (G01N 3/28 takes precedence) |
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3/ | 10 | . | . | generated by pneumatic or hydraulic pressure (G01N 3/18 takes precedence) |
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3/ | 12 | . | . | . | Pressure-testing (testing fluid-tightness G01M 3/00) |
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3/ | 14 | . | . | generated by dead weight, e.g. pendulum; generated by spring tension (G01N 3/18 takes precedence) |
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3/ | 16 | . | . | applied through gearing (G01N 3/18 takes precedence) |
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3/ | 18 | . | . | Performing tests at high or low temperatures |
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3/ | 20 | . | by applying steady bending forces (G01N 3/26, G01N 3/28 take precedence) |
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3/ | 22 | . | by applying steady torsional forces (G01N 3/26, G01N 3/28 take precedence) |
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3/ | 24 | . | by applying steady shearing forces (G01N 3/26, G01N 3/28 take precedence) |
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3/ | 26 | . | Investigating twisting or coiling properties |
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3/ | 28 | . | Investigating ductility, e.g. suitability of sheet metal for deep-drawing or spinning |
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3/ | 30 | . | by applying a single impulsive force (investigating hardness by performing impressions under impulsive load G01N 3/48) |
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3/ | 303 | . | . | generated only by free-falling weight [7] |
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3/ | 307 | . | . | generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means [7] |
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3/ | 31 | . | . | generated by a rotating fly-wheel [7] |
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3/ | 313 | . | . | generated by explosives [7] |
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3/ | 317 | . | . | generated by electromagnetic means [7] |
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3/ | 32 | . | by applying repeated or pulsating forces (generation of such forces in general, see the relevant classes or subclasses, e.g. B06, G10) |
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3/ | 34 | . | . | generated by mechanical means, e.g. hammer blows |
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3/ | 36 | . | . | generated by pneumatic or hydraulic means |
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3/ | 38 | . | . | generated by electromagnetic means |
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3/ | 40 | . | Investigating hardness or rebound hardness |
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3/ | 42 | . | . | by performing impressions under a steady load by indentors, e.g. sphere, pyramid (G01N 3/54 takes precedence) |
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3/ | 44 | . | . | . | the indentors being put under a minor load and a subsequent major load, i.e. Rockwell system |
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3/ | 46 | . | . | . | the indentors performing a scratching movement |
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3/ | 48 | . | . | by performing impressions under impulsive load by indentors, e.g. falling ball (G01N 3/54 takes precedence) |
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3/ | 50 | . | . | by measuring rolling friction, e.g. by rocking pendulum (G01N 3/54 takes precedence) |
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3/ | 52 | . | . | by measuring extent of rebound of a striking body (G01N 3/54 takes precedence) |
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3/ | 54 | . | . | Performing tests at high or low temperatures |
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3/ | 56 | . | Investigating resistance to wear or abrasion |
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3/ | 58 | . | Investigating machinability by cutting tools; Investigating the cutting ability of tools |
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3/ | 60 | . | Investigating resistance of materials, e.g. refractory materials, to rapid heat changes |
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3/ | 62 | . | Manufacturing, calibrating, or repairing devices used in investigations covered by the preceding subgroups |
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5/ | 00 | Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid (G01N 9/00 takes precedence) |
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5/ | 02 | . | by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content |
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5/ | 04 | . | by removing a component, e.g. by evaporation, and weighing the remainder |
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7/ | 00 | Analysing materials by measuring the pressure or volume of a gas or vapour |
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7/ | 02 | . | by absorption, adsorption, or combustion of components and measurement of the change in pressure or volume of the remainder |
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7/ | 04 | . | . | by absorption or adsorption alone |
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7/ | 06 | . | . | by combustion alone |
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7/ | 08 | . | . | by combustion followed by absorption or adsorption of the combustion products |
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7/ | 10 | . | by allowing diffusion of components through a porous wall and measuring a pressure or volume difference |
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7/ | 12 | . | . | the diffusion being followed by combustion or catalytic oxidation |
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7/ | 14 | . | by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference |
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7/ | 16 | . | . | by heating the material |
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7/ | 18 | . | . | by allowing the material to react |
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7/ | 20 | . | . | . | the reaction being fermentation |
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7/ | 22 | . | . | . | . | of dough |
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9/ | 00 | Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity (weighing apparatus G01G) |
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9/ | 02 | . | by measuring weight of a known volume |
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9/ | 04 | . | . | of fluids |
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9/ | 06 | . | . | . | with continuous circulation through a pivotally-supported member |
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9/ | 08 | . | by measuring buoyant force of solid materials by weighing both in air and in a liquid |
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9/ | 10 | . | by observing bodies wholly or partially immersed in fluid materials |
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9/ | 12 | . | . | by observing the depth of immersion of the bodies, e.g. hydrometers |
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9/ | 14 | . | . | . | the body being built into a container |
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9/ | 16 | . | . | . | the body being pivoted |
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9/ | 18 | . | . | . | Special adaptations for indicating, recording, or control |
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9/ | 20 | . | . | by balancing the weight of the bodies |
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9/ | 22 | . | . | . | with continuous circulation of the fluid |
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9/ | 24 | . | by observing the transmission of wave or particle radiation through the material |
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9/ | 26 | . | by measuring pressure differences |
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9/ | 28 | . | . | by measuring the blowing pressure of gas bubbles escaping from nozzles at different depths in a liquid |
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9/ | 30 | . | by using centrifugal effects |
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9/ | 32 | . | by using flow properties of fluids, e.g. flow through tubes or apertures |
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9/ | 34 | . | . | by using elements moving through the fluid, e.g. vane |
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9/ | 36 | . | Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture (methods of measurement in general G01N 9/02 to G01N 9/32) |
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 | G01N 11/00 - G01N 21/958 |
