CPC Subgroup
C07C 41/01 Preparation of ethers
Full Title
Preparation of ethers; Preparation of compounds having [IMAGE cpc-sch-C07C-0958.gif] groups,[IMAGE cpc-sch-C07C-0959.gif] groups or[IMAGE cpc-sch-C07C-0960.gif] groups > Preparation of ethers
8 direct subcodes
Child Classifications
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- C07C 41/02 from oxiranes
- C07C 41/05 by addition of compounds to unsaturated compounds
- C07C 41/09 by dehydration of compounds containing hydroxy groups
- C07C 41/14 by exchange of organic parts on the ether-oxygen for other organic parts, e.g. by trans-etherification
- C07C 41/16 by reaction of esters of mineral or organic acids with hydroxy or O-metal groups
- C07C 41/18 by reactions not forming ether-oxygen bonds
- C07C 41/32 by isomerisation
- C07C 41/34 Separation; Purification; Stabilisation; Use of additives
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