IPC Subgroup
C01B 3/06 by reaction of inorganic compounds containing electro-positively bound hydrogen with inorganic reducing agents
Introduced: January 1980
Last revised: January 2026
Full Title
Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen > Production of hydrogen; Production of gaseous mixtures containing hydrogen > by reaction of inorganic compounds containing electro-positively bound hydrogen with inorganic reducing agents
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
6 direct subcodes
Child Classifications
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- C01B 3/061 by reaction of water with metal oxides
- C01B 3/065 by reaction of inorganic compounds with hydrides
- C01B 3/08 by reaction of inorganic compounds with metals
- C01B 3/103 the hydrogen being generated from the water as a result of cycles of reactions, e.g. sulfur-iodine cycle
- C01B 3/12 by reaction of water vapour with carbon monoxide
- C01B 3/2 by reaction of metal hydroxides with carbon monoxide
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