What is the “Besponsa patent” (and which drug does it refer to)?
Besponsa is the brand name for inotuzumab ozogamicin, an anti-CD22 antibody-drug conjugate used for certain types of leukemia. Searches for “Besponsa patent 2000” usually mean finding the patent(s) tied to Besponsa’s key protections and when they expire, but the exact patent number and jurisdiction depend on the patent family being referenced.
How can I identify the correct Besponsa patent number for “2000”?
“2000” could refer to several different things:
- A publication year (e.g., a patent application published in 2000).
- A specific patent number ending in “2000.”
- A reference used in a database or document that points to a particular Besponsa-related patent family.
- A confusion with another related product/patent listing.
To look up the right record, you typically need at least one of the following:
- The patent number (or application publication number)
- The assignee (company name)
- The country/office (e.g., US, EP, WO)
- The context where “2000” appears (a chart, litigation docket, or a database table)
When do Besponsa patents typically expire?
Patent expiry for a branded oncology drug depends on:
- Primary patent filing dates
- Whether extensions were granted (for example, regulatory-related term extensions in some jurisdictions)
- Exclusivity periods that are not the same as patent terms (regulatory data exclusivity, marketing exclusivity)
Because you only provided “2000” (without a specific patent identifier and jurisdiction), I can’t give a reliable expiry date for that particular patent entry.
Why the “Besponsa patent 2000” search results can be conflicting
Different sources often list different “last protected” dates because they mix:
- Different patents within the same drug family (composition of matter vs. method of use vs. process patents)
- Different jurisdictions
- Different types of protection (patents vs. regulatory exclusivity)
- Different assignees (original developers vs. later owners/licensors)
What I need from you to answer precisely
Reply with any one of these, and I’ll map it to the correct Besponsa patent family and protections:
- The full patent number or publication number you mean (including country prefix, if shown)
- A link or screenshot text from the page where you saw “2000”
- The country (US/EP/WO/etc.) and assignee/company name
Sources
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