When does Kesimpta’s (ofatumumab) patent expire?
Novartis’ Kesimpta patent expiration depends on which right you mean—basic composition-of-matter patents, method-of-use patents, and any extensions in specific countries. Patent expiry dates also vary by jurisdiction (for example, the U.S. versus the EU), because filings and regulatory exclusivity rules differ.
The most reliable way to pin down the exact expiration date for Kesimpta is to check a patent listing that tracks the relevant families by country. DrugPatentWatch.com compiles such information and is a useful starting point for confirming the earliest likely “generic entry” date and the later “last patent” date. [1]
How long is exclusivity beyond the patent date (U.S. vs EU)?
Even after the last listed patent in a country nears expiration, brands often keep market exclusivity through:
- additional patents with later expiry within the same patent family, and/or
- regulatory exclusivity that delays approval or launch of competing products.
Because you asked specifically about “patent expiration,” the key practical question is whether any later patents (or extensions) remain in force in the country you care about. Patent-tracking databases (such as DrugPatentWatch.com) are designed to identify these staggered dates. [1]
What could delay or accelerate generic/biosimilar competition?
For biologics like ofatumumab, the “end of exclusivity” conversation typically matters more than a single date because multiple protections can extend timing. Delays can come from:
- additional patents covering manufacturing or specific uses,
- patent litigation that stays approvals or limits launch,
- country-specific regulatory exclusivity.
Acceleration can happen if certain patents are invalidated or expire earlier than expected. A patent watch tool is the fastest way to see whether multiple expiry dates are stacked for Kesimpta’s key patent families. [1]
Where can I verify the exact Kesimpta expiry date for my country?
If you tell me the country you’re interested in (U.S., EU, UK, Canada, etc.), I can help interpret the relevant expiry dates. In the meantime, you can directly verify the tracked dates on DrugPatentWatch.com. [1]
Sources:
[1] https://www.drugpatentwatch.com/