G01J 3/40 Measuring the intensity of spectral lines by determining density of a photograph of the spectrum; Spectrography (G01J3/42, G01J3/44 take precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Measuring the intensity of spectral lines by determining density of a photograph of the spectrum; Spectrography
CPC: Measuring the intensity of spectral lines by determining density of a photograph of the spectrum; Spectrography (G01J3/42, G01J3/44 take precedence)
Full Title
Full titles differ between systems:
Spectrometry; Spectrophotometry; Monochromators; Measuring colours > Investigating the spectrum > Measuring the intensity of spectral lines by determining density of a photograph of the spectrum; Spectrography
Spectrometry; Spectrophotometry; Monochromators; Measuring colours > Investigating the spectrum (using colour filters G01J3/51) > Measuring the intensity of spectral lines by determining density of a photograph of the spectrum; Spectrography (G01J3/42, G01J3/44 take precedence)
No child classifications to compare. This is a leaf node in both 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