C01F 7/3 Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
Introduced: September 1968
Last revised: January 2022
Full Title
Compounds of aluminium > Aluminium oxide; Aluminium hydroxide; Aluminates > Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE EARTH METALS
Filing statistics
IPC C01F 7/3 belongs to the parent subclass C01F, which recorded 36,684 patent applications worldwide between 2013 and 2023. Annual filings grew from 2,787 in 2013 to 3,525 in 2023 (+26%), peaking at 3,703 applications in 2017. The most active applicants in class C01 are CHINESE ACADEMY OF SCIENCES (5,794 applications), SINOPEC (CHINA PETROCHEMICAL CORPORATION) (3,286 applications) and LG CHEM (2,689 applications).
Source: EPO PATSTAT, worldwide filings
4 direct subcodes
Child Classifications
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- C01F 7/302 Hydrolysis or oxidation of gaseous aluminium compounds in the gaseous phase
- C01F 7/306 Thermal decomposition of hydrated chlorides, e.g. of aluminium trichloride hexahydrate
- C01F 7/308 Thermal decomposition of nitrates
- C01F 7/32 Thermal decomposition of sulfates including complex sulfates, e.g. alums
Top Applicants
Top 10 applicants by patent filingsfor 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