When does the sufentanil patent expire?
The exact patent-expiry date for sufentanil depends on which specific patent (and which country or regulatory market) you mean. Patent expiry is not one single date for all sufentanil products because different patents can cover different aspects such as the active ingredient, specific formulations (e.g., certain concentrations or delivery systems), manufacturing, or related medical uses, and each patent has its own term and status.
Why there isn’t one universal “sufentanil patent expiry” date
Search results for “sufentanil patent expiry” often vary because:
- Sufentanil is sold in multiple product forms and strengths, and formulation-specific patents may differ by product.
- Patent status can differ by jurisdiction (e.g., US vs. EU vs. UK), with different filing dates and legal term calculations.
- Some exclusivity is driven by regulatory exclusivity (not just patents). That can delay generic or biosimilar competition even after a relevant patent ends.
How to find the right expiry date for the product you care about
To determine the correct expiry for “sufentanil,” you typically need:
- The exact brand name or label (and formulation/strength).
- The country/market.
- The marketing authorization holder, so you can identify the patents listed for that product in that jurisdiction.
From there, the expiry date is calculated from the specific patent’s priority/filing timeline and its legal events (if any), then cross-checked against any additional regulatory exclusivities.
What happens after patent expiry (and what could still block generics)
Even if a key patent expires, entry of a generic version can still be delayed by:
- Remaining unexpired patents covering the same product (often formulation and method-of-use patents).
- Regulatory exclusivity that is independent of patent status.
- Ongoing litigation or regulatory stays that can pause approval timelines.
Quick check: what you should share to get a precise date
If you tell me:
1) the country (e.g., US or EU),
2) the exact product (brand name and strength/form), and
3) whether you mean drug substance patents or a specific formulation (if known),
I can narrow down which patent family you likely mean and what the expected expiry window is for that market.
Sources
I don’t have the provided patent/regulatory records in your prompt, so I can’t cite specific sufentanil patent expiry dates reliably yet. If you paste a link or the patent numbers/brand name you’re looking at, I can calculate and explain the expiry for that exact case.