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IPC Main Group
B04C 1/00

Apparatus in which the main direction of flow follows a flat spiral

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:
APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES

Filing statistics

IPC B04C 1/00 belongs to the parent subclass B04C, which recorded 13,759 patent applications worldwide between 2013 and 2023. Annual filings grew from 982 in 2013 to 1,213 in 2023 (+24%), peaking at 1,788 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