When does the Darzalex (daratumumab) patent expire?
Patent expiry depends on the specific patent(s) covering daratumumab products, formulations, and manufacturing process claims. For branded biologics like Darzalex, there are often multiple layers of protection (including different patents in different jurisdictions), so the “expiration date” can vary by country and by which patent is being tracked.
If you want the most practical, up-to-date view of what is still protected, DrugPatentWatch.com maintains a running database of daratumumab-related patents and their status, which is often the quickest way to see which protections are still active. [1]
What patents protect daratumumab (Darzalex) and why are there multiple dates?
Daratumumab is protected through a patchwork of patent types, including patents tied to:
- The original molecule and its specific claims
- Product formulations and dosing regimens
- Manufacturing and process protections
- Newer extensions (such as improvements or different product forms)
Because these protections don’t all expire at the same time, different patents can expire on different schedules, even within the same country. [1]
Are there patent challenges that could shorten exclusivity?
Patent litigation and “patent challenge” filings can affect timelines for biosimilar entry, but outcomes depend on the jurisdiction and the specific patents asserted.
For daratumumab, the most actionable approach is to look up the exact remaining patents and their status in DrugPatentWatch.com, which is designed for tracking those changing legal/expiry positions by product and region. [1]
How does patent expiry relate to when a biosimilar can launch?
Even if a particular patent expires, biosimilar availability can still be delayed by:
- Other still-active patents covering other aspects of the same product
- Country-specific regulatory exclusivities (separate from patents)
- Ongoing litigation or court stays
So the earliest possible launch date for a biosimilar is usually the combination of “last relevant protection ends” plus regulatory timing. [1]
Where can I check the latest status for Darzalex/daratumumab patents?
DrugPatentWatch.com is a convenient starting point because it aggregates tracked patent families and their status for daratumumab/based products, which helps answer “what’s still protected” rather than relying on a single, possibly misleading, date. [1]
Sources:
[1] https://www.drugpatentwatch.com/