DIFF Subgroup
C09B 35/039 characterised by the tetrazo component
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Disazo or polyazo dyes of the type A ← D → B prepared by diazotising and coupling > Disazo dyes > characterised by the tetrazo component
CPC:
Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling > Disazo dyes > characterised by the tetrazo component
IPC and CPC are identically structured here. All 11 subcodes exist in both systems.
3 shared codes have differing titles between IPC and CPC.
Child Classifications
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- C09B 35/205 the tetrazo component being a derivative of a diaryl- or triaryl- alkane or-alkene since 1980 IPC+CPC Available in IPC and CPC
- C09B 35/22 the tetrazo component being a derivative of a diaryl ether IPC+CPC Available in IPC and CPC
- C09B 35/227 the tetrazo component being a derivative of a diaryl sulfide or a diaryl polysulfide since 1980 IPC+CPC Available in IPC and CPC
- C09B 35/233 the tetrazo component being a derivative of a diaryl ketone or benzil since 1980 IPC+CPC Available in IPC and CPC
- C09B 35/24 the tetrazo component being a derivative of a diaryl amine IPC+CPC Available in IPC and CPC
- C09B 35/26 the tetrazo component being a derivative of a diaryl urea IPC+CPC Available in IPC and CPC
- C09B 35/28 the tetrazo component containing two aryl nuclei linked by at least one of the groups —CON<, —SO2N<, —SO2—, or —SO2—O— IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class C09,2013–2023, worldwide · Source: EPO PATSTAT
- LG CHEM KR 6,420
- NITTO DENKO CORPORATION JP 5,752
- HALLIBURTON ENERGY SERVICES GROUP US 5,650
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 5,635
- DOW GLOBAL TECHNOLOGIES US 4,844
- MERCK PATENT DE 4,779
- CHINESE ACADEMY OF SCIENCES 4,311
- FUJIFILM JP 4,205
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 4,039
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,931
Top Applicants (CPC)
Class C09,2013–2023, worldwide · Source: EPO PATSTAT
- LG CHEM KR 7,954
- HALLIBURTON ENERGY SERVICES GROUP US 6,584
- NITTO DENKO CORPORATION JP 6,500
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 6,490
- DOW GLOBAL TECHNOLOGIES US 6,324
- FUJIFILM JP 5,832
- MERCK PATENT DE 5,481
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 5,147
- SAMSUNG DISPLAY KR 5,105
- NITTO DENKO CORPORATION 3,584