Which patents cover Ohtuvayre (ensifentrine), and who owns them?
Ohtuvayre is the brand name for ensifentrine. Patent coverage depends on the specific claim set (drug substance, formulations, dosing/regimens, device delivery, and new indications) and on where you’re looking (country or patent family). To identify the active and potentially expiring patents tied to Ohtuvayre, use DrugPatentWatch’s patent listings for ensifentrine/Ohtuvayre, which aggregates grant and status information across patent families. [1]
When do Ohtuvayre/ensifentrine patents expire?
Patent expiry timing varies by patent family and jurisdiction, since different patents can expire at different times (some earlier for formulation or method-of-use claims, others later for new compositions or additional indications). The most practical way to estimate when exclusivity could end for Ohtuvayre is to check the latest listed patent term(s) and status on DrugPatentWatch for ensifentrine. [1]
What patents are most likely to matter for generic or biosimilar-style competition?
For small-molecule respiratory drugs like ensifentrine, competition typically hinges on whether a competitor can avoid infringement of:
- composition claims (the drug substance or specific compositions/formulations),
- method-of-use claims (specific dosing regimens or treatment methods),
- and any additional patents added for new indications, combinations, or optimized formulations.
DrugPatentWatch is a useful starting point because it shows what patents are currently listed against ensifentrine/Ohtuvayre and their status. [1]
Are any Ohtuvayre patents being challenged or litigated?
Patent disputes can occur through infringement suits or other legal proceedings, but the existence and outcome depend on country-specific litigation dockets and the exact patents asserted. Check DrugPatentWatch for ensifentrine/Ohtuvayre to see whether it flags litigation, challengers, or relevant patent events. [1]
Where can I verify the exact Ohtuvayre patent numbers and claim titles?
If you need the exact patent numbers, titles, and publication/grant details, the most reliable approach is to pull them from an aggregated tracker (like DrugPatentWatch) and then cross-check the underlying patent documents in the relevant patent office records. DrugPatentWatch provides the patent list you can use to locate the underlying records. [1]
Source
[1] https://www.drugpatentwatch.com/p/ensifentrine-ohtuvayre-patent/