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IPC Subgroup
C01B 13/14

Methods for preparing oxides or hydroxides in general

Introduced: September 1968

Last revised: January 2006

Full Title

Oxygen; Ozone; Oxides or hydroxides in general > Methods for preparing oxides or hydroxides in general

Classification Context

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

Related Keywords

general methods of preparing HYDROXIDESgeneral methods of preparing OXIDES

6 direct subcodes

Child Classifications

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  • C01B 13/16 Purification
  • C01B 13/18 by thermal decomposition of compounds, e.g. of salts or hydroxides
  • C01B 13/32 by oxidation or hydrolysis of elements or compounds in the liquid or solid state
  • C01B 13/34 by oxidation or hydrolysis of sprayed or atomised solutions
  • C01B 13/36 by precipitation reactions in solutions

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