CPC Subgroup
C01F 7/42 Preparation of aluminium oxide or hydroxide from metallic aluminium, e.g. by oxidation
Full Title
Compounds of aluminium > Aluminium oxide; Aluminium hydroxide; Aluminates > Preparation of aluminium oxide or hydroxide from metallic aluminium, e.g. by oxidation
3 direct subcodes
Child Classifications
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- C01F 7/422 by oxidation with a gaseous oxidator at a high temperature
- C01F 7/426 by applying mechanical energy to solid aluminium at a low temperature
- C01F 7/428 by oxidation in an aqueous solution
Top Applicants
Top 10 applicants by patent filingsfor 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