When does the patent for koselugo expire in usa?

When does the Koselugo patent expire in the U.S.?

Koselugo (selumetinib) is protected by U.S. patents, but the exact “patent expiry” date depends on which specific patent and patent term (or any exclusivity) you mean. The most relevant public tracking of those dates is typically organized by the underlying Orange Book and related patent listings.

You can check the latest U.S. expiration dates and which patents drive them on DrugPatentWatch here: https://www.drugpatentwatch.com/ (search “Koselugo” / “selumetinib”). [1]

Why the answer can differ depending on the patent you mean

DrugPatentWatch lists multiple patent numbers for a single drug product, and each one can have a different expiration date. Some patents may expire earlier, while others extend protection later through patent term adjustments or other legal timing. That’s why “Koselugo patent expiry” is not usually a single universal date without specifying the patent(s). [1]

Can generic or biosimilar competition start immediately on the first patent date?

Not necessarily. Even after one patent expires, other listed patents (or regulatory exclusivities) can still block generic entry until later dates tied to the remaining patents in the U.S. [1]

What to look for if you want the exact expiry day

If you want, tell me whether you mean:
- the first listed U.S. patent expiry date for Koselugo, or
- the last/most restrictive expiry date (the one that typically matters for generic timing), or
- an Orange Book “exclusivity” date.

Then I can help interpret the list of dates you see on DrugPatentWatch.

Sources
[1] https://www.drugpatentwatch.com/