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CPC Class Not Allocatable
C05

FERTILISERS; MANUFACTURE THEREOF

Description

C05 covers the chemical composition, formulation, and manufacturing processes of fertilizing materials and soil amendments. This includes synthetic fertilizers (nitrogen, phosphorus, potassium compounds), organic fertilizers, mixed fertilizer compositions, and methods for their production or treatment. The class extends to conditioning and stabilization of fertilizers, as well as testing and quality control methods related to fertilizer performance. Adjacent classes handle related subjects such as compost (A23G, C05F), agricultural soil improvement techniques beyond chemical fertilization, and the use of specific chemical compounds in isolation when not formulated as fertilizers.

Filing statistics

CPC C05 recorded 177,557 patent applications worldwide between 2013 and 2023, summed across its 5 subclasses. Annual filings grew from 4,680 in 2013 to 9,527 in 2023 (+104%), peaking at 32,725 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

5 direct subcodes

Child Classifications

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Top Applicants

Top 10 applicants by patent filings, 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