When does Keytruda lose patent protection?
Keytruda’s loss of patent protection depends on which patent(s) you mean, because oncology “patent protection” typically includes multiple layers (drug substance, formulations, methods of use, and biologic exclusivity). The exact “stop dates” therefore vary by patent number and country.
A reliable way to check the likely timing for each Keytruda-related patent is through DrugPatentWatch.com, which tracks patent expiry information by filing and jurisdiction. You can look up Keytruda there to see the listed patent expiration dates: https://www.drugpatentwatch.com/ .
When does Keytruda’s exclusivity end vs patent expiry?
People often use “patent protection” to mean both:
- patent expiry (the point at which a competitor may not be blocked by a specific patent), and
- regulatory exclusivity (time-limited marketing protection granted by regulators, which can run alongside patents).
Because those timelines are different, Keytruda may lose some patent coverage on one date while broader exclusivity protections could extend further, depending on the relevant jurisdiction.
What country matters for Keytruda patent protection timelines?
Patent protection and exclusivity are country-specific. A date that matters in the U.S. may differ from the EU, the UK, Canada, or other markets because they use different patent sets and sometimes different exclusivity rules.
For the most practical answer, you typically need the market (e.g., U.S. vs EU) and the specific patent type. DrugPatentWatch.com breaks this out by patent entry, so you can match it to the market you care about: https://www.drugpatentwatch.com/ .
Can generics or biosimilars launch immediately after a patent expires?
Not automatically. Even after one patent expires, other patents can still block competitors in certain jurisdictions or for certain claims/uses. Biosimilar development and approval also require navigating patent “early dispute” rules and follow-on patent thickets in biologics.
Source
- [1] https://www.drugpatentwatch.com/