C01B 3/50 Separation of hydrogen or hydrogen-containing gases from gaseous mixtures, e.g. purification
Full Title
Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen (production of water-gas or synthesis gas from solid carbonaceous material C10J) > Separation of hydrogen or hydrogen-containing gases from gaseous mixtures, e.g. purification
Filing statistics
CPC C01B 3/50 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
5 direct subcodes
Child Classifications
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- C01B 3/501 by diffusion
- C01B 3/506 at low temperatures
- C01B 3/508 by using hydrogen storage media (reversible storage of hydrogen C01B3/0005)
- C01B 3/52 by contacting with liquids; Regeneration of used liquids
- C01B 3/56 by contacting with solids; Regeneration of used solids
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