C05F ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES , , e.g. FERTILISERS FROM WASTE OR REFUSE
Introduced: September 1968
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- FERTILISERS; MANUFACTURE THEREOF
- Subclass:
- ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES , , e.g. FERTILISERS FROM WASTE OR REFUSE
Description
C05F encompasses organic fertilisers derived from waste materials, refuse, and other organic sources not classified elsewhere within the fertiliser categories. This subclass covers technologies for processing and converting organic waste streams—such as compost, sewage sludge, animal manure, and industrial organic byproducts—into soil amendments and plant nutrients. The classification includes methods for treating, stabilising, and preparing these materials to improve their agronomic value and safety for agricultural application.
Filing statistics
IPC subclass C05F recorded 57,775 patent applications worldwide between 2013 and 2023. Annual filings grew from 2,815 in 2013 to 5,150 in 2023 (+83%), peaking at 6,775 applications in 2020. 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
fertiliser (fertiliser material) fertiliser fertilisers fertiliser material fertiliser materials natural or artificial substance containing the chemical elements that improve growth and productiveness of plants.
Related Keywords
8 direct subcodes
Child Classifications
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- C05F 1/00 Fertilisers made from animal corpses, or parts thereof
- C05F 11/00 Other organic fertilisers
- C05F 15/00 Mixtures of fertilisers covered by more than one of main groups; Fertilisers from mixtures of starting materials, all the starting materials being covered by this subclass but not by the same main group
- C05F 17/00 Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F 3/00 Fertilisers from human or animal excrements, e.g. manure
- C05F 5/00 Fertilisers from distillery wastes, molasses, vinasses, sugar plant, or similar wastes or residues
- C05F 7/00 Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
- C05F 9/00 Fertilisers from household or town refuse
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