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DIFF Subgroup
G01N 27/30

Electrodes, e.g. test electrodes; Half-cells (G01N27/414 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Electrodes, e.g. test electrodes; Half-cells

CPC: Electrodes, e.g. test electrodes; Half-cells (G01N27/414 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 > Electrolytic cell components > Electrodes, e.g. test electrodes; Half-cells

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 > Electrolytic cell components > Electrodes, e.g. test electrodes; Half-cells (G01N27/414 takes precedence)

Of 13 combined children, 7 exist in both systems.

6 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • G01N 27/301 CPC only CPC only
  • G01N 27/302 CPC only CPC only
  • G01N 27/304 CPC only CPC only
  • G01N 27/305 CPC only CPC only
  • G01N 27/307 CPC only CPC only
  • G01N 27/308 CPC only CPC only
  • G01N 27/31 Half-cells with permeable membranes, e.g. semi-porous or perm-selective membranes since 1990 IPC+CPC Available in IPC and CPC
  • G01N 27/32 Calomel electrodes IPC+CPC Available in IPC and CPC
  • G01N 27/34 Dropping-mercury electrodes IPC+CPC Available in IPC and CPC
  • G01N 27/36 Glass electrodes IPC+CPC Available in IPC and CPC
  • G01N 27/38 Cleaning of electrodes 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