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DIFF Subgroup
C05F 17/921

Devices in which the material is conveyed essentially horizontally between inlet and discharge means

Introduced: January 2020

Full Title

Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation > Apparatus therefor > Devices in which the material is conveyed essentially horizontally between inlet and discharge means

Of 4 combined children, 3 exist in both systems.

1 codes are CPC-only extensions.

IPC defines codes here since 2020.

Child Classifications

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  • C05F 17/929 Cylinders or drums since 2020 IPC+CPC Available in IPC and CPC
  • C05F 17/936 Tunnels since 2020 IPC+CPC Available in IPC and CPC
  • C05F 17/939 CPC only CPC only
  • C05F 17/943 Means for combined mixing and conveying since 2020 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class C05,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 895
  2. BASF (BADISCHE ANILIN & SODA FABRIK) DE 387
  3. GUIZHOU UNIVERSITY 386
  4. YARA INTERNATIONAL NO 380
  5. SHENZHEN BATIAN ECOTYPIC ENGINEERING COMPANY 378
  6. SHANDONG SUNWAY LANDSCAPE TECHNOLOGY COMPANY 327
  7. GUILIN JIEYU ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY COMPANY 283
  8. CHINA AGRICULTURAL UNIVERSITY 271
  9. GUANGXI UNIVERSITY 266
  10. NANJING AGRICULTURAL UNIVERSITY 231

Top Applicants (CPC)

Class C05,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 654
  2. BASF (BADISCHE ANILIN & SODA FABRIK) DE 452
  3. YARA INTERNATIONAL NO 434
  4. SHANDONG SUNWAY LANDSCAPE TECHNOLOGY COMPANY 315
  5. SHENZHEN BATIAN ECOTYPIC ENGINEERING COMPANY 253
  6. GUIZHOU UNIVERSITY 251
  7. GUILIN JIEYU ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY COMPANY 236
  8. GUANGXI ACADEMY OF AGRICULTURAL SCIENCES 205
  9. CHINA AGRICULTURAL UNIVERSITY 197
  10. KOCH AGRONOMIC SERVICES US 194