Systems (G01N27/27 takes precedence)

Introduced: January 1990

Title

Titles differ between systems:

IPC: Systems

CPC: Systems (G01N27/27 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Investigating or analysing materials by the use of electric, electrochemical, or magnetic means > by investigating electrochemical variables; by using electrolysis or electrophoresis > Systems

CPC:

Investigating or analysing materials by the use of electric, electrochemical, or magnetic means (G01N3/00 – G01N25/00 take precedence; measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials G01R) > by investigating electrochemical variables; by using electrolysis or electrophoresis > Systems (G01N27/27 takes precedence)

Of 9 combined children, 5 exist in both systems.

4 codes are CPC-only extensions.

Child Classifications

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G01N 27/4161 CPC only CPC only
G01N 27/4162 CPC only CPC only
G01N 27/4163 +1 CPC CPC only CPC only
G01N 27/4166 +2 CPC CPC only CPC only
G01N 27/417 using cells and probes with solid electrolytes since 1990 +1 CPC IPC+CPC Available in IPC and CPC
G01N 27/42 Measuring deposition or liberation of materials from an electrolyte; Coulometry, i.e. measuring coulomb-equivalent of material in an electrolyte +2 CPC IPC+CPC Available in IPC and CPC
G01N 27/447 using electrophoresis since 1990 +2 CPC IPC+CPC Available in IPC and CPC
G01N 27/48 using polarography, i.e. measuring changes in current under a slowly-varying voltage IPC+CPC Available in IPC and CPC
G01N 27/49 Systems involving the determination of the current at a single specific value, or small range of values, of applied voltage for producing selective measurement of one or more particular ionic species since 1990 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