• All sections
• A - Human necessities
• A61K - Preparations for medical, dental or toiletry purposes
• A61K 31/4375 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems the heterocyclic ring system containing a six-membered ring having nitrogen as a ring hetero atom, e.g. quinolizines, naphthyridines, berberine, vincamine

Patent holdings for IPC class A61K 31/4375

Total number of patents in this class: 3306

10-year publication summary

Principal owners for this class