C05B 11/04 using mineral acid
Full Title
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 > using mineral acid
Filing statistics
CPC C05B 11/04 belongs to the parent subclass C05B, which recorded 32,111 patent applications worldwide between 2013 and 2023. Annual filings grew from 728 in 2013 to 1,217 in 2023 (+67%), peaking at 6,987 applications in 2017. The most active applicants in class C05 are CHINESE ACADEMY OF SCIENCES (654 applications), BASF (BADISCHE ANILIN & SODA FABRIK) (452 applications) and YARA INTERNATIONAL (434 applications).
Source: EPO PATSTAT, worldwide filings
5 direct subcodes
Child Classifications
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- C05B 11/06 using nitric acid (nitrophosphates)
- C05B 11/08 using sulfuric acid
- C05B 11/10 using orthophosphoric acid
- C05B 11/12 using aqueous hydrochloric acid
- C05B 11/14 using wet gaseous acids
Top Applicants
Top 10 applicants by patent filingsfor class C05, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 654
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 452
- YARA INTERNATIONAL NO 434
- SHANDONG SUNWAY LANDSCAPE TECHNOLOGY COMPANY 315
- SHENZHEN BATIAN ECOTYPIC ENGINEERING COMPANY 253
- GUIZHOU UNIVERSITY 251
- GUILIN JIEYU ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY COMPANY 236
- GUANGXI ACADEMY OF AGRICULTURAL SCIENCES 205
- CHINA AGRICULTURAL UNIVERSITY 197
- KOCH AGRONOMIC SERVICES US 194