IPC Main Group
B04B 3/00 Centrifuges with rotary bowls in which solid particles or bodies become separated by centrifugal force and simultaneously sifting or filtering
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- Subclass:
- CENTRIFUGES
Filing statistics
IPC B04B 3/00 belongs to the parent subclass B04B, which recorded 29,367 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,431 in 2013 to 3,841 in 2023 (+168%), peaking at 3,944 applications in 2020. The most active applicants in class B04 are ALFA LAVAL (541 applications), GEA MECHANICAL EQUIPMENT (297 applications) and CSSC NANJING LUZHOU MACHINE COMPANY (165 applications).
Source: EPO PATSTAT, worldwide filings
4 direct subcodes
Child Classifications
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- B04B 3/02 discharging solid particles from the bowl by means co-axial with the bowl axis and moving to and fro, i.e. push-type centrifuges
- B04B 3/04 discharging solid particles from the bowl by a conveying screw co-axial with the bowl axis and rotating relatively to the bowl
- B04B 3/06 discharging solid particles by vibrating the bowl
- B04B 3/08 discharging solid particles by bowl walls in the form of endless bands
Top Applicants
Top 10 applicants by patent filingsfor class B04, 2013–2023, worldwide · Source: EPO PATSTAT
- ALFA LAVAL SE 541
- GEA MECHANICAL EQUIPMENT DE 297
- CSSC NANJING LUZHOU MACHINE COMPANY 165
- GEA WESTFALIA SEPARATOR GROUP DE 138
- FLOTTWEG SE DE 124
- ANDREAS HETTICH & COMPANY DE 108
- OMACHRON INTELLECTUAL PROPERTY CA 98
- MANN + HUMMEL DE 95
- DYSON GB 87
- JIANGSU SAIDELI PHARMACEUTICAL MACHINE COMPANY 82