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IPC Subgroup
B01F 27/27

Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices

Introduced: January 2022

Full Title

Mixers with rotary stirring devices in fixed receptacles; Kneaders > Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices

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 27/27 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

2 direct subcodes

Child Classifications

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  • B01F 27/271 with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
  • B01F 27/272 with means for moving the materials to be mixed axially between the surfaces of the rotor and the stator, e.g. the stator rotor system formed by conical or cylindrical surfaces

Top Applicants

Top 10 applicants by patent filingsfor class B01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 16,893
  2. CHINESE ACADEMY OF SCIENCES 11,733
  3. BASF (BADISCHE ANILIN & SODA FABRIK) DE 3,898
  4. LG CHEM KR 3,367
  5. PETROCHINA COMPANY 3,224
  6. IFPEN (IFP ENERGIES NOUVELLES) FR 3,042
  7. ZHEJIANG UNIVERSITY 2,890
  8. MANN + HUMMEL DE 2,740
  9. JOHNSON MATTHEY GB 2,534
  10. SAUDI ARABIAN OIL COMPANY SA 2,527