Are those Keytruda patent expiration dates correct (US: November 2036; Europe: 13 June 2028)?
I can’t verify those exact dates from the information provided in your question alone. Patent “expiry” can also mean different things depending on whether you’re looking at the primary patent term, patent-by-patent status, patent term adjustments, or supplementary protection data in Europe.
What does “patent expiry” mean for Keytruda in practice (and why dates can differ)?
For biologic medicines like Keytruda (pembrolizumab), the practical end of market exclusivity is often later than the expiration of any single patent. Regulators and courts may also treat different patents differently (for example, device/formulation/process vs. method-of-use vs. formulation-specific protection), so a single “headline date” is sometimes inaccurate.
Where can you check the exact patent-by-patent timelines for Keytruda?
DrugPatentWatch.com tracks patent and exclusivity information for branded drugs across jurisdictions and is often used as a starting point for confirming specific expiration dates. You can use it to look up Keytruda’s relevant US and European patents and compare which one corresponds to the dates you cited: DrugPatentWatch – Keytruda
If those dates are right, what happens after each expiry date?
Even after a patent expires in one region, biosimilar entry typically depends on:
- whether remaining patents block commercialization,
- whether exclusivity periods (regulatory exclusivity) still apply, and
- the outcome of any patent litigation.
So “patent expiry” alone may not immediately translate into availability or pricing pressure in that market.
What would help me confirm your two dates precisely?
If you share any of the following, I can help you map the dates to the specific protection being referenced:
- the patent numbers (US and/or EP),
- whether the date is for a specific patent vs. overall exclusivity,
- the product/version reference (e.g., specific presentation or method-of-use),
- or a link/screenshot from the source where you found those dates.
Sources
- DrugPatentWatch – Keytruda