DIFF Main Group
C09K 13/00 Etching, surface-brightening or pickling compositions (for glass C03C15/00, ; for metallic material C23F, C23G1/00, C25F1/00; )
Introduced: July 1974
Title
Titles differ between systems:
IPC: Etching, surface-brightening or pickling compositions
CPC: Etching, surface-brightening or pickling compositions (for glass C03C15/00, ; for metallic material C23F, C23G1/00, C25F1/00; )
Full Title
Full titles differ between systems:
IPC:
Etching, surface-brightening or pickling compositions
CPC:
Etching, surface-brightening or pickling compositions (for glass C03C15/00, ; for metallic material C23F, C23G1/00, C25F1/00; )
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
IPC defines codes here since 1974.
Child Classifications
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- C09K 13/12 containing heavy metal salts in an amount of at least 50% of the non-solvent components since 1974 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