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IPC Subgroup
C01B 3/0018

Inorganic elements or compounds, e.g. oxides, nitrides, borohydrides or zeolites; Solutions thereof

Introduced: January 2026

Full Title

Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen > Reversible storage of hydrogen, e.g. by hydrogen getters or electrodes > characterised by the uptaking media; Treatment thereof > Inorganic elements or compounds, e.g. oxides, nitrides, borohydrides or zeolites; Solutions thereof

Classification Context

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

3 direct subcodes

Child Classifications

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  • C01B 3/0021 Elemental carbon, e.g. active carbon, carbon nanotubes or fullerenes
  • C01B 3/0026 Metals or metal hydrides

Top Applicants

Top 10 applicants by patent filingsfor class C01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 5,794
  2. SINOPEC (CHINA PETROCHEMICAL CORPORATION) 3,286
  3. LG CHEM KR 2,689
  4. BASF (BADISCHE ANILIN & SODA FABRIK) DE 1,669
  5. CENTRAL SOUTH UNIVERSITY 1,531
  6. KMUST (KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY) 1,252
  7. SUMITOMO METAL MINING COMPANY JP 1,073
  8. ZHEJIANG UNIVERSITY 1,061
  9. PANASONIC INTELLECTUAL PROPERTY JP 1,058
  10. PANASONIC INTELLECTUAL PROPERTY 1,038