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.

Filing statistics

IPC subclass C05B recorded 3,923 patent applications worldwide between 2013 and 2023. Annual filings declined from 310 in 2013 to 291 in 2023 (-6%), peaking at 423 applications in 2016. The most active applicants in class C05 are CHINESE ACADEMY OF SCIENCES (895 applications), BASF (BADISCHE ANILIN & SODA FABRIK) (387 applications) and GUIZHOU UNIVERSITY (386 applications).

Source: EPO PATSTAT, worldwide filings

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

phosphatic FERTILISERSfertilisers containing PHOSPHATE(S)

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