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CPC Subgroup
B04B 1/20

discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl

Full Title

Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles > discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl

Filing statistics

CPC B04B 1/20 belongs to the parent subclass B04B, which recorded 12,669 patent applications worldwide between 2013 and 2023. Annual filings grew from 851 in 2013 to 1,158 in 2023 (+36%), peaking at 1,364 applications in 2018. The most active applicants in class B04 are ALFA LAVAL (576 applications), GEA MECHANICAL EQUIPMENT (304 applications) and DYSON (221 applications).

Source: EPO PATSTAT, worldwide filings

10 direct subcodes

Child Classifications

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Top Applicants

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

  1. ALFA LAVAL SE 576
  2. GEA MECHANICAL EQUIPMENT DE 304
  3. DYSON GB 221
  4. LG ELECTRONICS KR 151
  5. GEA WESTFALIA SEPARATOR GROUP DE 138
  6. FLOTTWEG SE DE 129
  7. FENWAL US 114
  8. BECTON, DICKINSON & COMPANY US 112
  9. ANDREAS HETTICH & COMPANY DE 109
  10. OMACHRON INTELLECTUAL PROPERTY CA 108