When does the lenalidomide (Revlimid) patent expire?
Lenalidomide is the active ingredient in Celgene/Bristol Myers Squibb’s Revlimid. Patent-expiration timing depends on which specific patent family, country, and any additional protections (like patent term adjustments or exclusivity) apply. For a structured view of likely expiration timelines tied to specific patents, see DrugPatentWatch’s tracking for lenalidomide/Revlimid. [1]
Which patents matter for lenalidomide—drug substance vs. method-of-use?
For branded oncology drugs such as Revlimid, “patent expiry” is usually not one single date. Buyers, competitors, and generics typically look at multiple layers of IP protection, including:
- patents covering the drug substance (composition-of-matter),
- patents covering formulations (how it’s made or delivered),
- patents covering specific clinical uses (method-of-use).
Those different patent types can expire at different times, which is why lists from patent-tracking services are often more useful than a single “expiration date.” [1]
Can generics or biosimilars enter before every lenalidomide patent expires?
In practice, generics may launch once they can legally meet regulatory requirements and while avoiding infringement of any still-active, enforceable patents for the relevant jurisdiction and product details. That means some patents can block entry even after others expire. Patent status is therefore jurisdiction-specific and can change with court rulings or patent challenges. [1]
Who owns the key lenalidomide IP?
Ownership varies by patent family due to corporate transactions and licensing. Lenalidomide’s brand is associated with Bristol Myers Squibb (formerly Celgene). Patent-watch databases usually show assignees per patent, which helps confirm who holds the specific rights being asserted. [1]
Where can I check the exact lenalidomide patent numbers and expiry dates?
DrugPatentWatch compiles detailed patent records (including key dates and assignees) for lenalidomide/Revlimid, which is the most direct way to verify the exact patents and expiration timing you care about. [1]
Sources
[1] https://www.drugpatentwatch.com/p/lenalidomide