DIFF Main Group
C01G 53/00 Compounds of nickel
Introduced: September 1968
IPC and CPC are identically structured here. All 11 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- C01G 53/01 Preparation or separation involving a liquid-liquid extraction, an adsorption or an ion-exchange since 2025 IPC+CPC Available in IPC and CPC
- C01G 53/40 Complex oxides containing nickel and at least one other metal element since 2025 IPC+CPC Available in IPC and CPC
- C01G 53/80 Compounds containing nickel, with or without oxygen or hydrogen, and containing one or more other elements (C01G53/02, C01G53/06 - C01G53/40 take precedence) since 2025 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class C01,2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 5,794
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,286
- LG CHEM KR 2,689
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 1,669
- CENTRAL SOUTH UNIVERSITY 1,531
- KMUST (KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY) 1,252
- SUMITOMO METAL MINING COMPANY JP 1,073
- ZHEJIANG UNIVERSITY 1,061
- PANASONIC INTELLECTUAL PROPERTY JP 1,058
- PANASONIC INTELLECTUAL PROPERTY 1,038
Top Applicants (CPC)
Class C01,2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 4,293
- LG CHEM KR 3,317
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 2,219
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 2,154
- OMYA INTERNATIONAL CH 1,524
- PANASONIC INTELLECTUAL PROPERTY JP 1,362
- SAUDI ARABIAN OIL COMPANY SA 1,298
- SUMITOMO METAL MINING COMPANY JP 1,286
- CENTRAL SOUTH UNIVERSITY 1,243
- L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE FR 1,238