Investigating or analysing materials by the use of electric, electrochemical, or magnetic means (G01N3/00 – G01N25/00 take precedence; measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials G01R)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Investigating or analysing materials by the use of electric, electrochemical, or magnetic means

CPC: Investigating or analysing materials by the use of electric, electrochemical, or magnetic means (G01N3/00 – G01N25/00 take precedence; measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials G01R)

Full Title

Full titles differ between systems:

IPC:

Investigating or analysing materials by the use of electric, electrochemical, or magnetic means

CPC:

Investigating or analysing materials by the use of electric, electrochemical, or magnetic means (G01N3/00 – G01N25/00 take precedence; measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials G01R)

Additional Content IPC

Limiting references

investigating strength properties of solid materials by application of mechanical stress analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid analysing materials by measuring the pressure or volume of a gas or vapour investigatingdensity or specific gravity of materials; analysing materials by determining density or specific gravity investigating flow properties of materials, e.g. viscosity, plasticity; analysing materials by determining flow properties investigating surface or boundary effects, e.g. wetting power; investigating diffusion effects; analysing materials by determining surface, boundary, or diffusion effects investigating characteristics of particles; investigatingpermeability, pore-volume, or surface-area of porous materials investigating resistance of materials to the weather, to corrosion, or to light investigatingmaterials by mechanical methods investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light investigating or analysing materials by the use of microwaves investigating or analysing materials by the use of other wave or particle radiation, e.g. X-rays or neutrons investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects investigating or analysing materials by the use of thermal means measuring or investigating electric or magnetic properties of materials (see also Relationship between large subject matter areas, above)

Application references

medical or veterinary diagnosis on the human or animal body using electric or magnetic means

Of 8 combined children, 6 exist in both systems.

2 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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G01N 27/002 +1 CPC CPC only CPC only
G01N 27/007 CPC only CPC only
G01N 27/02 by investigating impedance +4 CPC IPC+CPC Available in IPC and CPC
G01N 27/26 by investigating electrochemical variables; by using electrolysis or electrophoresis IPC+CPC Available in IPC and CPC
G01N 27/60 by investigating electrostatic variables +1 CPC IPC+CPC Available in IPC and CPC
G01N 27/62 by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode IPC+CPC Available in IPC and CPC
G01N 27/72 by investigating magnetic variables +1 CPC IPC+CPC Available in IPC and CPC
G01N 27/92 by investigating breakdown voltage (G01N27/60, G01N27/62 take precedence) since 1980 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class G01,2013–2023, worldwide · Source: EPO PATSTAT

SGCC(STATE GRID CORPORATION OF CHINA) 41,447
CHINESE ACADEMY OF SCIENCES 32,952
ROBERT BOSCH DE 16,470
SAMSUNG ELECTRONICS COMPANY KR 10,052
SINOPEC (CHINA PETROCHEMICAL CORPORATION) 9,573
ZHEJIANG UNIVERSITY 9,529
GUANGDONG POWER GRID CORPORATION 8,615
TSINGHUA UNIVERSITY 7,805
HALLIBURTON ENERGY SERVICES GROUP US 7,796
QUALCOMM US 7,171

Top Applicants (CPC)

Class G01,2013–2023, worldwide · Source: EPO PATSTAT

CHINESE ACADEMY OF SCIENCES 21,460
ROBERT BOSCH DE 17,801
SGCC(STATE GRID CORPORATION OF CHINA) 17,347
SAMSUNG ELECTRONICS COMPANY KR 13,192
QUALCOMM US 9,900
HALLIBURTON ENERGY SERVICES GROUP US 9,742
PHILIPS ELECTRONICS NL 7,249
MITSUBISHI ELECTRIC CORPORATION JP 6,503
ZHEJIANG UNIVERSITY 6,414
DENSO CORPORATION JP 6,382