C05B PHOSPHATIC FERTILISERS
Description
C05B covers the manufacture and composition of fertilizers whose primary nutritive component is phosphorus or phosphate compounds. This includes superphosphates, triple superphosphates, phosphate rock products, and other phosphorus-containing fertilizer formulations, whether simple phosphate salts or complex mixtures with secondary nutrients. The classification encompasses both chemical processes for phosphate conversion and the resulting fertilizer products, but excludes nitrogen-phosphorus or potassium-phosphorus compound fertilizers, which fall under other C05 subclasses.
Filing statistics
CPC subclass C05B 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
10 direct subcodes
Child Classifications
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- C05B 1/00 Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
- C05B 11/00 Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
- C05B 13/00 Fertilisers produced by pyrogenic processes from phosphatic materials
- C05B 15/00 Organic phosphatic fertilisers (bone meal C05B17/00)
- C05B 17/00 Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
- C05B 19/00 Granulation or pelletisation of phosphatic fertilisers, other than slag (granulating apparatus B01J2/00; granulating slag C04B)
- C05B 3/00 Fertilisers based essentially on di-calcium phosphate (C05B11/00 takes precedence)
- C05B 5/00 Thomas phosphate; Other slag phosphates
- C05B 7/00 Fertilisers based essentially on alkali or ammonium orthophosphates (C05B11/00 takes precedence)
- C05B 9/00 Fertilisers based essentially on phosphates or double phosphates of magnesium (C05B11/00 takes precedence)
Top Applicants
Top 10 applicants by patent filingsfor class C05, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 654
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 452
- YARA INTERNATIONAL NO 434
- SHANDONG SUNWAY LANDSCAPE TECHNOLOGY COMPANY 315
- SHENZHEN BATIAN ECOTYPIC ENGINEERING COMPANY 253
- GUIZHOU UNIVERSITY 251
- GUILIN JIEYU ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY COMPANY 236
- GUANGXI ACADEMY OF AGRICULTURAL SCIENCES 205
- CHINA AGRICULTURAL UNIVERSITY 197
- KOCH AGRONOMIC SERVICES US 194