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PCE
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CPC Subgroup
G01N 7/10

by allowing diffusion of components through a porous wall and measuring a pressure or volume difference

Full Title

Analysing materials by measuring the pressure or volume of a gas or vapour > by allowing diffusion of components through a porous wall and measuring a pressure or volume difference

1 direct subcode

Child Classifications

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  • G01N 7/12 the diffusion being followed by combustion or catalytic oxidation

Top Applicants

Top 10 applicants by patent filingsfor 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