IPC Subgroup
C07D 201/02 Preparation of lactams
Introduced: July 1974
Last revised: January 2006
Full Title
Preparation, separation, purification, or stabilisation of unsubstituted lactams > Preparation of lactams
Classification Context
- Section:
- CHEMISTRY; METALLURGY
- Class:
- ORGANIC CHEMISTRY
- Subclass:
- HETEROCYCLIC COMPOUNDS
4 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- C07D 201/04 from or oximes by Beckmann rearrangement
- C07D 201/08 from carboxylic acids or derivatives thereof, e.g. hydroxy carboxylic acids, lactones, nitriles
- C07D 201/1 from cycloaliphatic compounds by simultaneous nitrosylation and rearrangement
- C07D 201/12 by depolymerising polyamides
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