• All sections
• A - Human necessities
• A61K - Preparations for medical, dental or toiletry purposes
• A61K 31/553 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having at least one nitrogen and at least one oxygen as ring hetero atoms, e.g. loxapine, staurosporine

Patent holdings for IPC class A61K 31/553

Total number of patents in this class: 2332

10-year publication summary

Principal owners for this class