IPC Subgroup
C07C 41/01 Preparation of ethers
Introduced: January 1980
Last revised: January 2006
Full Title
Preparation of ethers; Preparation of compounds having groups, groups or groups > Preparation of ethers
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- ORGANIC CHEMISTRY
- Subclass:
- ACYCLIC OR CARBOCYCLIC COMPOUNDS
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
- CHINESE ACADEMY OF SCIENCES 12,697
- ROCHE CH 11,347
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 11,024
- NOVARTIS CH 9,356
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 8,531
- BRISTOL-MYERS SQUIBB COMPANY US 7,320
- LG CHEM KR 7,245
- REGENERON PHARMACEUTICALS US 6,816
- HARVARD UNIVERSITY US 6,190
- GENENTECH US 5,922