G01K 5/02 the material being a liquid (contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the material G01K5/32)
Introduced: September 1968
Title
Titles differ between systems:
IPC: the material being a liquid
CPC: the material being a liquid (contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the material G01K5/32)
Full Title
Full titles differ between systems:
Measuring temperature based on the expansion or contraction of a material > the material being a liquid
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 liquid (contained in a hollow body having parts which are deformable or displaceable under the pressure developed by the material G01K5/32)
Of 9 combined children, 8 exist in both systems.
1 codes are CPC-only extensions.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G01K 5/14 the liquid displacing a further liquid column or a solid body (for maximum or minimum indication G01K5/20) IPC+CPC Available in IPC and CPC
- G01K 5/20 with means for indicating a maximum or a minimum or both (G01K5/22 takes precedence) IPC+CPC Available in IPC and CPC
- G01K 5/22 with provision for expansion indicating over not more than a few degrees +1 CPC IPC+CPC Available in IPC and CPC
- G01K 5/24 with provision for measuring the difference between two temperatures IPC+CPC Available in IPC and CPC
- G01K 5/26 with provision for adjusting zero point of scale, e.g. Beckmann thermometer 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