Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom (C01F7/028 takes precedence)

Full Title

Compounds of aluminium > Aluminium oxide; Aluminium hydroxide; Aluminates > Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom (C01F7/028 takes precedence)

Filing statistics

CPC C01F 7/04 belongs to the parent subclass C01F, which recorded 31,328 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,757 in 2013 to 2,958 in 2023 (+68%), peaking at 3,432 applications in 2021. The most active applicants in class C01 are CHINESE ACADEMY OF SCIENCES (4,293 applications), LG CHEM (3,317 applications) and BASF (BADISCHE ANILIN & SODA FABRIK) (2,219 applications).

Source: EPO PATSTAT, worldwide filings

7 direct subcodes

Child Classifications

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C01F 7/043 Lithium aluminates
C01F 7/046 Stabilisation of aluminates
C01F 7/06 by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process (obtaining aluminium oxide or hydroxide from the resulting aluminate solution C01F7/14)
C01F 7/08 by treating aluminous minerals with sodium carbonate, e.g. sinter processes (C01F7/0613, C01F7/066 take precedence)
C01F 7/10 by treating aluminous minerals with alkali sulfates and reducing agents
C01F 7/12 Alkali metal aluminates from alkaline-earth metal aluminates
C01F 7/14 Aluminium oxide or hydroxide from alkali metal aluminates

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