CPC Main Group
C01B 25/00 Phosphorus; Compounds thereof ( , C01B21/00, C01B23/00 take precedence; perphosphates C01B15/16)
Filing statistics
CPC C01B 25/00 belongs to the parent subclass C01B, which recorded 208,069 patent applications worldwide between 2013 and 2023. Annual filings grew from 11,850 in 2013 to 24,181 in 2023 (+104%), peaking at 24,407 applications in 2022. The most active applicants in class C01 are CHINESE ACADEMY OF SCIENCES (4,293 applications), LG CHEM (3,317 applications) and BASF (BADISCHE ANILIN & SODA FABRIK) (2,219 applications).
Source: EPO PATSTAT, worldwide filings
10 direct subcodes
Child Classifications
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- C01B 25/01 Treating phosphate ores or other raw phosphate materials to obtain phosphorus or phosphorus compounds
- C01B 25/02 Preparation of phosphorus
- C01B 25/04 Purification of phosphorus
- C01B 25/06 Hydrogen phosphides
- C01B 25/08 Other phosphides
- C01B 25/10 Halides or oxyhalides of phosphorus
- C01B 25/12 Oxides of phosphorus
- C01B 25/14 Sulfur, selenium, or tellurium compounds of phosphorus
- C01B 25/16 Oxyacids of phosphorus; Salts thereof (peroxyacids or salts thereof C01B15/00)
Top Applicants
Top 10 applicants by patent filingsfor class C01, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 4,293
- LG CHEM KR 3,317
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 2,219
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 2,154
- OMYA INTERNATIONAL CH 1,524
- PANASONIC INTELLECTUAL PROPERTY JP 1,362
- SAUDI ARABIAN OIL COMPANY SA 1,298
- SUMITOMO METAL MINING COMPANY JP 1,286
- CENTRAL SOUTH UNIVERSITY 1,243
- L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE FR 1,238