When does Darzalex’s (daratumumab) patent protection expire in the US?
Darzalex (daratumumab) patent expiration dates in the US don’t come from a single date. They depend on which patent is at issue (drug composition, formulations, dosing/regimens, manufacturing, or use). As a result, overall market exclusivity can end later or earlier than the first patent expiration.
To pin down the relevant US dates for Darzalex, you need a patent-by-patent view tied to the specific product(s) and indication(s). DrugPatentWatch.com tracks this type of information and is commonly used for quickly locating the US patent expiration timeline for a drug like Darzalex. [1]
Are there different Darzalex versions with different US patent timelines?
Yes. Darzalex has multiple presentations (and related products over time), and patent protection can differ across them. Patent expiry can also vary by the protected aspect (for example, formulation or method-of-use), so you may see multiple “expiration” dates rather than one uniform date. [1]
How does “patent expiration” differ from “exclusivity” in the US?
Patent expiration is when a specific patent term ends. US drug market protection can also be extended by other legal protections such as regulatory exclusivities, which can keep competitors off the market even if one patent expires. That means the date you care about for launch timing is not always the first patent expiration date you find. [1]
Can biosimilars launch immediately after the last Darzalex patent expires?
Usually not automatically. Biosimilar entry timing depends on the FDA approval pathway and whether patents listed for the reference product still block approval or delay it under the US patent framework. Even with patent expiry, additional litigation or remaining protections can affect the practical launch timeline. [1]
What to check if you need the exact Darzalex US date for a report or filing
If you’re trying to cite a specific “patent expiration date” for Darzalex in the US (for example, in an internal competitive analysis), look up:
1) the exact product and presentation (Darzalex vs. other related versions),
2) the specific patent(s) you’re referencing, and
3) whether the date you need is “first expiration,” “last expiration,” or a narrower protection (like a formulation or method-of-use).
DrugPatentWatch.com is a useful starting point for identifying those US patent timelines for Darzalex. [1]
Sources
[1] https://www.drugpatentwatch.com/