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IPC Subgroup
B04B 9/1

Control of the drive; Speed regulating

Introduced: September 1968

Last revised: January 2006

Full Title

Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls > Control of the drive; Speed regulating

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
Subclass:
CENTRIFUGES

Filing statistics

IPC B04B 9/1 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

Top Applicants

Top 10 applicants by patent filingsfor class B04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. ALFA LAVAL SE 541
  2. GEA MECHANICAL EQUIPMENT DE 297
  3. CSSC NANJING LUZHOU MACHINE COMPANY 165
  4. GEA WESTFALIA SEPARATOR GROUP DE 138
  5. FLOTTWEG SE DE 124
  6. ANDREAS HETTICH & COMPANY DE 108
  7. OMACHRON INTELLECTUAL PROPERTY CA 98
  8. MANN + HUMMEL DE 95
  9. DYSON GB 87
  10. JIANGSU SAIDELI PHARMACEUTICAL MACHINE COMPANY 82