FERTILISERS; MANUFACTURE THEREOF

Classification Context

Section:: CHEMISTRY; METALLURGY
Class:: FERTILISERS; MANUFACTURE THEREOF

Description

C05 covers the chemical composition, formulation, and manufacturing processes of fertilizing materials and soil amendments. This includes synthetic fertilizers (nitrogen, phosphorus, potassium compounds), organic fertilizers, mixed fertilizer compositions, and methods for their production or treatment. The class extends to conditioning and stabilization of fertilizers, as well as testing and quality control methods related to fertilizer performance. Adjacent classes handle related subjects such as compost (A23G, C05F), agricultural soil improvement techniques beyond chemical fertilization, and the use of specific chemical compounds in isolation when not formulated as fertilizers.

Filing statistics

IPC C05 recorded 165,691 patent applications worldwide between 2013 and 2023, summed across its 5 subclasses. Annual filings grew from 9,540 in 2013 to 10,707 in 2023 (+12%), peaking at 24,488 applications in 2017. 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

Related Keywords

SOIL fertilisationSOIL sterilisation

5 direct subcodes

Child Classifications

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C05B PHOSPHATIC FERTILISERS
C05C NITROGENOUS FERTILISERS
C05D INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES ,; FERTILISERS PRODUCING CARBON DIOXIDE
C05F ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES , , e.g. FERTILISERS FROM WASTE OR REFUSE
C05G MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS; MIXTURES OF ONE OR MORE FERTILISERS WITH ADDITIVES NOT HAVING A SPECIFIC FERTILISING ACTIVITY; FERTILISERS CHARACTERISED BY THEIR FORM

Top Applicants

Top 10 applicants by patent filings, 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