• All sections
• A - Human necessities
• A61K - Preparations for medical, dental or toiletry purposes
• A61K 31/437 - 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 five-membered ring having nitrogen as a ring hetero atom, e.g. indolizine, beta-carboline

Patent holdings for IPC class A61K 31/437

Total number of patents in this class: 9502

10-year publication summary

Principal owners for this class