C05B PHOSPHATIC FERTILISERS
Introduced: September 1968
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- FERTILISERS; MANUFACTURE THEREOF
- Subclass:
- 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.
Additional Content
Glossary
Fertiliser (fertiliser material) fertiliser fertilisers fertiliser material fertiliser materials Natural or artificial substance containing the chemical elements that improve growth and productiveness of plants. Phosphatic fertiliser phosphatic fertilisers A source of inorganic and/or organic phosphate. Common examples include single superphosphate - (CaH2PO4)16 - having a P2O5 content of circa 18%* and ammonium phosphate, having a P2O5 content of circa 20%*. Thomas phosphate A furnace slag produced in steel-making, containing large amounts of calcium phosphate. Double superphosphate double superphosphates CaH4(PO4)2 - having circa 32% P2O5 present* Triple superphosphate triple superphosphates Ca(H2 PO4)2 having circa 46-48% P2O5 present*
Limiting references
Nitrogenous fertilisers Inorganic fertilisers not covered by subclasses , ; Fertilisers producing carbon dioxide Organic fertilisers not covered by subclasses , , e.g. fertilisers from waste or refuse
Related Keywords
11 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
- 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
- C05B 21/00 Mixtures of phosphatic fertilisers covered by more than one of main groups
- C05B 3/00 Fertilisers based essentially on di-calcium phosphate
- C05B 5/00 Thomas phosphate; Other slag phosphates
- C05B 7/00 Fertilisers based essentially on alkali or ammonium orthophosphates
- C05B 9/00 Fertilisers based essentially on phosphates or double phosphates of magnesium
Top Applicants
Top 10 applicants by patent filingsfor class C05, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 895
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 387
- GUIZHOU UNIVERSITY 386
- YARA INTERNATIONAL NO 380
- SHENZHEN BATIAN ECOTYPIC ENGINEERING COMPANY 378
- SHANDONG SUNWAY LANDSCAPE TECHNOLOGY COMPANY 327
- GUILIN JIEYU ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY COMPANY 283
- CHINA AGRICULTURAL UNIVERSITY 271
- GUANGXI UNIVERSITY 266
- NANJING AGRICULTURAL UNIVERSITY 231