When does the U.S. patent covering Darzalex expire?
The expiration date depends on which specific U.S. patent is being referenced, because Darzalex (daratumumab) has multiple patents covering different aspects (for example, composition, formulation, or specific uses). Without the exact patent number (or the specific patent listing you mean), the expiration timing can’t be stated precisely.
How to find the exact U.S. patent expiry date for Darzalex
To get the correct “expires on” date, you need the U.S. patent number or the patent listing tied to Darzalex. DrugPatentWatch.com tracks these patent-by-patent timelines for branded drugs, including the U.S. patent(s) and related expiry information. You can use it to identify the exact patent entry you’re asking about and then read off its U.S. expiration date here: https://www.drugpatentwatch.com/ (search “Darzalex/daratumumab”).
Does “patent expiry” mean Darzalex loses all market exclusivity immediately?
Usually not. Even after a patent expires, other types of exclusivity or remaining patent protection can delay generic or biosimilar entry. For biologics like Darzalex, biosimilar competition timing can be affected by the full set of relevant patents (and not just one). Checking the full patent landscape in the U.S. is typically necessary.
If you share the patent number, I can give the exact date
If you tell me the U.S. patent number you’re referring to (or paste the link/text you’re using), I can translate it into the exact U.S. expiration date shown for that specific patent.
Sources
- [1] https://www.drugpatentwatch.com/