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PCE
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DIFF Subgroup
G01K 5/32

the material being a fluid contained in a hollow body having parts which are deformable or displaceable (under pressure developed by evaporation G01K11/04; pressure measuring devices in general G01L)

Introduced: September 1968

Title

Titles differ between systems:

IPC: the material being a fluid contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the material

CPC: the material being a fluid contained in a hollow body having parts which are deformable or displaceable (under pressure developed by evaporation G01K11/04; pressure measuring devices in general G01L)

Full Title

Full titles differ between systems:

IPC:

Measuring temperature based on the expansion or contraction of a material > the material being a fluid contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the material

CPC:

Measuring temperature based on the expansion or contraction of a material (G01K9/00 takes precedence; giving other than momentary value of temperature G01K3/00) > the material being a fluid contained in a hollow body having parts which are deformable or displaceable (under pressure developed by evaporation G01K11/04; pressure measuring devices in general G01L)

Of 7 combined children, 5 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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  • G01K 5/323 CPC only CPC only
  • G01K 5/326 CPC only CPC only
  • G01K 5/34 the body being a capsule (G01K5/36, G01K5/42 take precedence) IPC+CPC Available in IPC and CPC
  • G01K 5/42 the body being a bellows IPC+CPC Available in IPC and CPC
  • G01K 5/44 the body being a cylinder and piston 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