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DIFF Subgroup
B04B 7/16

Sieves or filters (filters in general B01D; sieves in general B07B)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Sieves or filters

CPC: Sieves or filters (filters in general B01D; sieves in general B07B)

Full Title

Full titles differ between systems:

IPC:

Elements of centrifuges > Rotary bowls > Inserts, e.g. armouring plates > Sieves or filters

CPC:

Elements of centrifuges (drives B04B9/00; feeding, charging, or discharging appurtenances or devices B04B11/00) > Rotary bowls (centrifugal casting machines B22D) > Inserts, e.g. armouring plates > Sieves or filters (filters in general B01D; sieves in general B07B)

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

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