G01N 21/88 Investigating the presence of flaws or contamination
Introduced: January 1980
Title
Titles differ between systems:
IPC: Investigating the presence of flaws, defects or contamination
CPC: Investigating the presence of flaws or contamination
Full Title
Full titles differ between systems:
Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light > Systems specially adapted for particular applications > Investigating the presence of flaws, defects or contamination
Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light (G01N3/00 - G01N19/00 take precedence) > Systems specially adapted for particular applications > Investigating the presence of flaws or contamination
Of 9 combined children, 6 exist in both systems.
3 codes are CPC-only extensions.
4 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1980.
Child Classifications
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- G01N 21/89 in moving material, e.g. running paper or textiles (G01N21/90, G01N21/91, G01N21/94 take precedence) since 1980 +3 CPC IPC+CPC Available in IPC and CPC
- G01N 21/90 in a container or its contents (G01N21/91 takes precedence) since 1980 +9 CPC IPC+CPC Available in IPC and CPC
- G01N 21/91 using penetration of dyes, e.g. fluorescent ink since 1980 IPC+CPC Available in IPC and CPC
- G01N 21/94 Investigating contamination, e.g. dust (G01N21/85 takes precedence) since 2000 +1 CPC IPC+CPC Available in IPC and CPC
- G01N 21/95 characterised by the material or shape of the object to be examined (G01N21/89 - G01N21/91, G01N21/94 take precedence) since 2000 +7 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