IPC Main Group
C01D 7/00 Carbonates of sodium, potassium, or alkali metals in general
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
13 direct subcodes
Child Classifications
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- C01D 7/02 Preparation by double decomposition
- C01D 7/06 Preparation sodium or potassium magnesium carbonate
- C01D 7/07 Preparation from the hydroxides
- C01D 7/08 Preparation from or cyano compounds of sodium or potassium
- C01D 7/1 Preparation of bicarbonates from carbonates
- C01D 7/12 Preparation of carbonates from bicarbonates
- C01D 7/14 Preparation of sesquicarbonates
- C01D 7/16 Preparation from compounds of sodium or potassium with amines and carbon dioxide
- C01D 7/18 Preparation by the ammonia-soda process
- C01D 7/22 Purification
- C01D 7/35 Varying the content of water of crystallisation or the specific gravity
- C01D 7/38 Preparation in the form of granules, pieces, or other shaped products
- C01D 7/42 Preventing the absorption of moisture or caking
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