IPC Subgroup
C01B 33/38 Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
Introduced: January 1995
Last revised: January 2006
Full Title
Silicon; Compounds thereof > Silicates > having base-exchange properties but not having molecular sieve properties > Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
3 direct subcodes
Child Classifications
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- C01B 33/4 Clays
- C01B 33/42 Micas
- C01B 33/44 Products obtained from layered base-exchange silicates by ion-exchange with organic compounds such as ammonium, phosphonium or sulfonium compounds or by intercalation of organic compounds, e.g. organoclay material
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