Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00

Introduced: September 1968

Title

Titles differ between systems:

IPC: Measuring temperature based on physical or chemical changes not covered by group , , , or

CPC: Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00

Full Title

Full titles differ between systems:

IPC:

Measuring temperature based on physical or chemical changes not covered by group , , , or

CPC:

Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00

Of 11 combined children, 9 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 11/003 CPC only CPC only
G01K 11/006 CPC only CPC only
G01K 11/02 using evaporation or sublimation, e.g. by observing boiling IPC+CPC Available in IPC and CPC
G01K 11/06 using melting, freezing, or softening IPC+CPC Available in IPC and CPC
G01K 11/10 using sintering IPC+CPC Available in IPC and CPC
G01K 11/12 using changes in colour, translucency or reflectance IPC+CPC Available in IPC and CPC
G01K 11/20 using thermoluminescent materials (G01K11/32 takes precedence) IPC+CPC Available in IPC and CPC
G01K 11/22 using measurement of acoustic effects IPC+CPC Available in IPC and CPC
G01K 11/28 using measurements of density IPC+CPC Available in IPC and CPC
G01K 11/30 using measurement of the effect of a material on X-radiation, gamma radiation or particle radiation since 1990 IPC+CPC Available in IPC and CPC
G01K 11/32 using changes in transmittance, scattering or luminescence in optical fibres since 1995 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