CPC Subgroup Additional Only
C07C 2603/04 containing three rings
Full Title
Systems containing at least three condensed rings > Ortho- or ortho- and peri-condensed systems > containing three rings
5 direct subcodes
Child Classifications
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- C07C 2603/06 containing at least one ring with less than six ring members
- C07C 2603/22 containing only six-membered rings
- C07C 2603/30 containing seven-membered rings
- C07C 2603/36 containing eight-membered rings
- C07C 2603/38 containing rings with at least nine members
Top Applicants
Top 10 applicants by patent filingsfor class C07, 2013–2023, worldwide · Source: EPO PATSTAT
- ROCHE CH 12,683
- NOVARTIS CH 10,775
- CHINESE ACADEMY OF SCIENCES 10,619
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 9,511
- REGENERON PHARMACEUTICALS US 8,426
- BRISTOL-MYERS SQUIBB COMPANY US 7,979
- LG CHEM KR 7,978
- HARVARD UNIVERSITY US 7,706
- UNIVERSITY OF CALIFORNIA US 7,455
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 7,219