DIFF Subgroup
C07C 41/01 Preparation of ethers
Introduced: January 1980
Full Title
Full titles differ between systems:
IPC:
Preparation of ethers; Preparation of compounds having groups, groups or groups > Preparation of ethers
CPC:
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
IPC and CPC are identically structured here. All 8 subcodes exist in both systems.
Child Classifications
Navigate with arrow keys, Enter to open
- C07C 41/05 by addition of compounds to unsaturated compounds since 1980 IPC+CPC Available in IPC and CPC
- C07C 41/09 by dehydration of compounds containing hydroxy groups since 1980 IPC+CPC Available in IPC and CPC
- C07C 41/14 by exchange of organic parts on the ether-oxygen for other organic parts, e.g. by trans-etherification since 1980 IPC+CPC Available in IPC and CPC
- C07C 41/16 by reaction of esters of mineral or organic acids with hydroxy or O-metal groups since 1980 IPC+CPC Available in IPC and CPC
- C07C 41/34 Separation; Purification; Stabilisation; Use of additives since 1980 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
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