IPC Subgroup
C01D 1/04 Hydroxides
Introduced: September 1968
Last revised: January 2006
Full Title
Oxides or hydroxides of sodium, potassium, or alkali metals in general > Hydroxides
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
Related Keywords
SODIUM hydroxide
5 direct subcodes
Child Classifications
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- C01D 1/2 Preparation by reacting oxides or hydroxides with alkali metal salts
- C01D 1/26 Preparation from or cyano compounds, e.g. cyanides, cyanamides
- C01D 1/28 Purification; Separation
- C01D 1/42 Concentration; Dehydration
- C01D 1/44 Preparation in the form of granules, pieces, or other shaped products
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