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CPC Subclass Not Allocatable
C05D

INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE

Description

C05D covers inorganic fertilizers that fall outside the scope of other C05 subclasses (such as nitrogen, phosphate, or potassium-based fertilizers with specific compositions), including formulations and manufacturing processes for these residual fertilizer types. This subclass specifically encompasses fertilizers that generate carbon dioxide as a functional component or byproduct, such as urea-based products and certain mineral amendments that release CO₂ during application or storage. The classification addresses both standalone inorganic fertilizer compositions not adequately covered elsewhere and combined fertilizer products designed to provide agronomic benefits through CO₂ generation. Manufacturing methods, handling, and formulation techniques for these specialized inorganic fertilizers are also included within this subclass.

5 direct subcodes

Child Classifications

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  • C05D 5/00 Fertilisers containing magnesium (C05D7/00 takes precedence)
  • C05D 7/00 Fertilisers producing carbon dioxide

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