Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry (beam switching arrangements G01J3/08)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Absorption spectrometry; Double-beam spectrometry; Flicker spectrometry; Reflection spectrometry

CPC: Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry (beam switching arrangements G01J3/08)

Full Title

Full titles differ between systems:

IPC:

Spectrometry; Spectrophotometry; Monochromators; Measuring colours > Investigating the spectrum > Absorption spectrometry; Double-beam spectrometry; Flicker spectrometry; Reflection spectrometry

CPC:

Spectrometry; Spectrophotometry; Monochromators; Measuring colours > Investigating the spectrum (using colour filters G01J3/51) > Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry (beam switching arrangements G01J3/08)

CPC subdivides this area 3x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

Note: 3 CPC extensions are marked as secondary classification only.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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G01J 2003/421 2nd only CPC only CPC only
G01J 2003/423 2nd only CPC only CPC only
G01J 2003/425 2nd only CPC only CPC only
G01J 3/427 Dual wavelengths spectrometry since 1985 +1 CPC IPC+CPC Available in IPC and CPC
G01J 3/433 Modulation spectrometry; Derivative spectrometry since 1985 +4 CPC 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