IPC Main Group
C01B 25/00 Phosphorus; Compounds thereof
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
Related Keywords
PHOSPHORUSinorganic compounds of PHOSPHORUS
9 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 25/1 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
Top Applicants
Top 10 applicants by patent filingsfor class C01, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 5,794
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,286
- LG CHEM KR 2,689
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 1,669
- CENTRAL SOUTH UNIVERSITY 1,531
- KMUST (KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY) 1,252
- SUMITOMO METAL MINING COMPANY JP 1,073
- ZHEJIANG UNIVERSITY 1,061
- PANASONIC INTELLECTUAL PROPERTY JP 1,058
- PANASONIC INTELLECTUAL PROPERTY 1,038