B01F 27/21 characterised by their rotating shafts
Introduced: January 2022
Full Title
Mixers with rotary stirring devices in fixed receptacles; Kneaders > characterised by their rotating shafts
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 27/21 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
6 direct subcodes
Child Classifications
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- B01F 27/211 characterised by the material of the shaft
- B01F 27/2121 composed of interconnected parts
- B01F 27/2122 Hollow shafts
- B01F 27/2123 Shafts with both stirring means and feeding or discharging means
- B01F 27/2124 Shafts with adjustable length, e.g. telescopic shafts
- B01F 27/213 characterised by the connection with the drive
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