B01F 33/00 Other mixers; Mixing plants; Combinations of mixers
Introduced: January 2022
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- Subclass:
- MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
Filing statistics
IPC B01F 33/00 belongs to the parent subclass B01F, which recorded 429,342 patent applications worldwide between 2013 and 2023. Annual filings grew from 10,442 in 2013 to 66,296 in 2023 (+535%), peaking at 69,567 applications in 2020. The most active applicants in class B01 are SINOPEC (CHINA PETROCHEMICAL CORPORATION) (16,893 applications), CHINESE ACADEMY OF SCIENCES (11,733 applications) and BASF (BADISCHE ANILIN & SODA FABRIK) (3,898 applications).
Source: EPO PATSTAT, worldwide filings
Additional Content
Mixing or kneading machines for the preparation of dough with rollers Continuous mixing or kneading of plastics with mechanical mixing or kneading devices
11 direct subcodes
Child Classifications
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- B01F 33/05 Mixers using radiation, e.g. magnetic fields or microwaves to mix the material
- B01F 33/12 Mixers in which the mixing of the components is achieved by natural convection
- B01F 33/25 Mixers with loose mixing elements, e.g. loose balls in a receptacle
- B01F 33/3 Micromixers
- B01F 33/35 Mixing after turning the mixing vessel upside down
- B01F 33/4 Mixers using gas or liquid agitation, e.g. with air supply tubes
- B01F 33/45 Magnetic mixers; Mixers with magnetically driven stirrers
- B01F 33/5 Movable or transportable mixing devices or plants
- B01F 33/7 Mixers specially adapted for working at sub- or super-atmospheric pressure, e.g. combined with de-foaming
- B01F 33/8 Mixing plants; Combinations of mixers
- B01F 33/87 Roll-type mixers
Top Applicants
Top 10 applicants by patent filingsfor class B01, 2013–2023, worldwide · Source: EPO PATSTAT
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 16,893
- CHINESE ACADEMY OF SCIENCES 11,733
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 3,898
- LG CHEM KR 3,367
- PETROCHINA COMPANY 3,224
- IFPEN (IFP ENERGIES NOUVELLES) FR 3,042
- ZHEJIANG UNIVERSITY 2,890
- MANN + HUMMEL DE 2,740
- JOHNSON MATTHEY GB 2,534
- SAUDI ARABIAN OIL COMPANY SA 2,527