Phosphorus; Compounds thereof

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:: CHEMISTRY; METALLURGY
Class:: INORGANIC CHEMISTRY
Subclass:: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF

Filing statistics

IPC C01B 25/00 belongs to the parent subclass C01B, which recorded 251,225 patent applications worldwide between 2013 and 2023. Annual filings grew from 17,923 in 2013 to 29,649 in 2023 (+65%). The most active applicants in class C01 are CHINESE ACADEMY OF SCIENCES (5,794 applications), SINOPEC (CHINA PETROCHEMICAL CORPORATION) (3,286 applications) and LG CHEM (2,689 applications).

Source: EPO PATSTAT, worldwide filings

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