What is Besponsa’s (inotuzumab ozogamicin) patent expiry date in the USA?
Publicly available information on an exact “Besponsa patent expiry date” in the USA isn’t straightforward to give from the brand name alone, because patent expiration depends on the specific patent(s) listed for Besponsa, their jurisdictional scope, and whether you mean ordinary patent expiration, pediatric exclusivity extensions, or market exclusivity under FDA rules.
If you tell me whether you mean:
- the earliest patent expiration,
- the latest patent expiration,
- or the expiry of FDA/market exclusivity (not the same as a patent),
I can narrow the answer to the right kind of date.
How do I find Besponsa’s real patent expiry date in the USA (practical method)?
In the US, the most reliable way to get the patent expiration timeline for a specific drug is to check FDA’s Orange Book record for Besponsa (active ingredient: inotuzumab ozogamicin). The Orange Book lists:
- relevant patents,
- their expiration dates (and sometimes other events),
- and exclusivity periods that can delay generic/biosimilar approval even after some patents expire.
A common approach is to look at the Orange Book entry and identify the “last” relevant patent expiration date tied to the product.
Is Besponsa a small-molecule generic scenario or a biosimilar scenario?
Besponsa is a biologic (an antibody-drug conjugate), so competition usually comes through biosimilar pathways rather than the “generic small-molecule” model. That matters because biosimilar development timing can depend on both patent status and FDA exclusivity, not only one single patent date.
Why you might see multiple dates (earliest vs latest) for “expiry”
Even for one brand drug, you can see multiple expiration dates because different patents cover different aspects (for example, composition, method of use, or manufacturing). The “expiry date” a company cares about is often the latest expiration of the patents that block approval of a competing product, not the first one to expire.
What I need from you to give an exact date
Send either:
1) the Orange Book “Patent/Exclusivity” table you’re looking at (or a link/screenshot), or
2) the exact Besponsa product details you mean (dose/form, and whether you mean “patents only” or “patents + exclusivity”).
Then I can interpret the Orange Book listing and tell you the specific USA patent expiry date you’re asking for (earliest, latest, or exclusivity end date).
Sources
No sources were provided in the prompt, so I can’t cite an exact USA expiry date yet. If you paste the Orange Book section (or link it), I’ll respond with the exact expiry date(s) and citations.