CPC Main Group
C10G 21/00 Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents (C10G17/00, C10G19/00 take precedence)
Filing statistics
CPC C10G 21/00 belongs to the parent subclass C10G, which recorded 73,540 patent applications worldwide between 2013 and 2023. Annual filings declined from 6,805 in 2013 to 5,869 in 2023 (-14%), peaking at 7,573 applications in 2016. The most active applicants in class C10 are SINOPEC (CHINA PETROCHEMICAL CORPORATION) (5,831 applications), SAUDI ARABIAN OIL COMPANY (2,918 applications) and IFPEN (IFP ENERGIES NOUVELLES) (2,305 applications).
Source: EPO PATSTAT, worldwide filings
6 direct subcodes
Child Classifications
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- C10G 21/02 with two or more solvents, which are introduced or withdrawn separately
- C10G 21/06 characterised by the solvent used
- C10G 21/28 Recovery of used solvent
- C10G 21/30 Controlling or regulating
Top Applicants
Top 10 applicants by patent filingsfor class C10, 2013–2023, worldwide · Source: EPO PATSTAT
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 5,831
- SAUDI ARABIAN OIL COMPANY SA 2,918
- IFPEN (IFP ENERGIES NOUVELLES) FR 2,305
- EXXONMOBIL RESEARCH AND ENGINEERING COMPANY US 2,282
- UNIVERSAL OIL PRODUCTS COMPANY (UOP) US 2,268
- SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NL 2,124
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 1,487
- CHEVRON CORPORATION US 1,400
- PETROCHINA COMPANY 1,372
- LUBRIZOL CORPORATION US 1,324