IPC Subgroup
C01C 1/2 Sulfides; Polysulfides
Introduced: September 1968
Last revised: January 2006
Full Title
Ammonia; Compounds thereof > Sulfides; Polysulfides
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- INORGANIC CHEMISTRY
- Subclass:
- AMMONIA; CYANOGEN; COMPOUNDS THEREOF
Related Keywords
ammonium SULFIDE(S)
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