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IPC Main Group
C05D 9/00

Other inorganic fertilisers

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
FERTILISERS; MANUFACTURE THEREOF
Subclass:
INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES ,; FERTILISERS PRODUCING CARBON DIOXIDE

Filing statistics

IPC C05D 9/00 belongs to the parent subclass C05D, which recorded 7,248 patent applications worldwide between 2013 and 2023. Annual filings grew from 505 in 2013 to 545 in 2023 (+8%), peaking at 851 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

1 direct subcode

Child Classifications

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Top Applicants

Top 10 applicants by patent filingsfor class C05, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 895
  2. BASF (BADISCHE ANILIN & SODA FABRIK) DE 387
  3. GUIZHOU UNIVERSITY 386
  4. YARA INTERNATIONAL NO 380
  5. SHENZHEN BATIAN ECOTYPIC ENGINEERING COMPANY 378
  6. SHANDONG SUNWAY LANDSCAPE TECHNOLOGY COMPANY 327
  7. GUILIN JIEYU ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY COMPANY 283
  8. CHINA AGRICULTURAL UNIVERSITY 271
  9. GUANGXI UNIVERSITY 266
  10. NANJING AGRICULTURAL UNIVERSITY 231