When does apixaban's patent expire exactly?

There isn’t a single “exact expiration” for apixaban. There are multiple patents (composition-of-matter, formulations, synthesis, usage, etc.) and there are also country-by-country patents and regulatory exclusivities. Expiration dates can differ by patent type and by jurisdiction, and term lengths are affected by patent term adjustments and data/regulatory exclusivities.

If you want an exact date, tell me:
- which country or region you’re interested in (e.g., United States, European Union, India, etc.)
- whether you care about composition-of-matter patents specifically, or also use/formation/process patents
- whether you want to include regulatory exclusivities (e.g., data exclusivity)

I can then pull the current patent status from sources like Google Patents, USPTO Patent Center (for the US), Espacenet, and the FDA Orange Book and give you the precise expiration dates for the relevant patents.