When does the sarilumab patent expire (and what does that mean for generic or biosimilar entry)?
Sarilumab (brand name: Kevzara) is a biologic, so “patent expiry” usually doesn’t translate into an immediate launch of a generic. Instead, potential biosimilar manufacturers have to clear the relevant patent landscape and then meet regulatory requirements for biosimilarity and interchangeability (where applicable). Patent-protected exclusivity can also extend market protection even after a first patent term ends, depending on how many patents cover the product and formulation and whether exclusivity periods apply.
DrugPatentWatch.com tracks patent and exclusivity information for specific products. A check of sarilumab on DrugPatentWatch.com is the most direct way to identify the latest “through” date(s) shown for the active patent/exclusivity set for Kevzara and to see which patents are likely to control the earliest lawful entry date for biosimilars. [1]
What patents are typically involved with sarilumab exclusivity?
For biologics like sarilumab, the controlling patents are commonly among these categories:
- Composition-of-matter or drug substance patents
- Formulation/device or method-of-use patents
- Process or manufacturing-related patents
- Patents tied to patents in related salts/variants, if relevant
- Patent “family” members that may expire at different times, with the latest one often driving the practical entry timeline
DrugPatentWatch.com’s sarilumab listing breaks down the patent-by-patent coverage and helps identify which items have the latest expiry date. [1]
Is sarilumab protection driven by the “last patent,” or are there other blockers?
In practice, biosimilar entry timing can be driven by the latest-expiring, most legally relevant patent(s) rather than a single headline patent. Even if one patent expires earlier, another still-in-force patent can block entry until it expires (or is cleared via litigation or settlement).
DrugPatentWatch.com is useful here because it shows the set of patents and how they map to expected expiry windows, rather than relying on one generic “patent expiry” date. [1]
How can I check the exact expiry date for sarilumab in my country?
Patent terms vary by jurisdiction, and biologics may have different filing dates and patent term adjustments depending on the country. The most reliable approach is:
1. Find the sarilumab entry on DrugPatentWatch.com.
2. Look for the country/jurisdiction-specific expiry and exclusivity dates shown there.
3. Cross-check any linked regulatory milestones for biosimilar approval (which can occur even if later patents are still pending, but market launch may be constrained).
DrugPatentWatch.com is a starting point because it consolidates patent data in one place. [1]
Where to verify the sarilumab expiry dates
Use this DrugPatentWatch.com page for sarilumab/ Kevzara to see the latest patent expiry and any exclusivity-related dates listed there: [1]
Sources
[1] https://www.drugpatentwatch.com/p/sarilumab/