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PCE
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DIFF Subgroup
G01N 11/04

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

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Investigating flow properties of materials, e.g. viscosity or plasticity; Analysing materials by determining flow properties > by measuring flow of the material > through a restricted passage, e.g. tube, aperture

CPC:

Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties > by measuring flow of the material > through a restricted passage, e.g. tube, aperture

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

Child Classifications

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  • G01N 11/06 by timing the outflow of a known quantity IPC+CPC Available in IPC and CPC
  • G01N 11/08 by measuring pressure required to produce a known flow 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