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CPC Main Group
C05B 13/00

Fertilisers produced by pyrogenic processes from phosphatic materials

Filing statistics

CPC C05B 13/00 belongs to the parent subclass C05B, which recorded 32,111 patent applications worldwide between 2013 and 2023. Annual filings grew from 728 in 2013 to 1,217 in 2023 (+67%), peaking at 6,987 applications in 2017. The most active applicants in class C05 are CHINESE ACADEMY OF SCIENCES (654 applications), BASF (BADISCHE ANILIN & SODA FABRIK) (452 applications) and YARA INTERNATIONAL (434 applications).

Source: EPO PATSTAT, worldwide filings

3 direct subcodes

Child Classifications

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  • C05B 13/02 from rock phosphates (C05B13/06 takes precedence)
  • C05B 13/04 from metallic phosphorus compounds, e.g. ferro-phosphorus
  • C05B 13/06 Alkali and alkaline earth meta- or polyphosphate fertilisers

Top Applicants

Top 10 applicants by patent filingsfor 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