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DIFF Main Group
G01N 19/00

Investigating materials by mechanical methods (G01N3/00 - G01N17/00 take precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Investigating materials by mechanical methods

CPC: Investigating materials by mechanical methods (G01N3/00 - G01N17/00 take precedence)

Full Title

Full titles differ between systems:

IPC:

Investigating materials by mechanical methods

CPC:

Investigating materials by mechanical methods (G01N3/00 - G01N17/00 take precedence)

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

Application references

determination of friction coefficient between road and wheel without additional sensors; application of friction determinations to the control of vehicle braking

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

Child Classifications

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  • G01N 19/02 Measuring coefficient of friction between materials IPC+CPC Available in IPC and CPC
  • G01N 19/04 Measuring adhesive force between materials, e.g. of sealing tape, of coating IPC+CPC Available in IPC and CPC
  • G01N 19/06 Investigating by removing material, e.g. spark-testing IPC+CPC Available in IPC and CPC
  • G01N 19/08 Detecting presence of flaws or irregularities IPC+CPC Available in IPC and CPC
  • G01N 19/10 Measuring moisture content, e.g. by measuring change in length of hygroscopic filament; Hygrometers IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

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

Top Applicants (CPC)

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

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