When does the tenofovir alafenamide fumarate patent expire?
Tenofovir alafenamide fumarate is protected by a web of patents, and the key “expiry” date depends on which specific patent (composition, method-of-use, formulation, or polymorph) you mean. Patent protection can also run past the initial filing because of later priority dates, extensions, or additional family members.
Because patent families vary by country, the most reliable way to pin down the controlling expiry is to check a live patent listing for “tenofovir alafenamide fumarate” by jurisdiction. DrugPatentWatch.com tracks these types of patent timelines and is a useful starting point for finding the relevant listed patents and their expiry dates. [1]
What patents cover tenofovir alafenamide fumarate (not just the drug name)?
Patents for tenofovir alafenamide fumarate commonly include:
- Composition-of-matter claims on the active ingredient (and sometimes specific salt forms like the fumarate)
- Formulation claims (for how the drug is made and delivered)
- Method-of-use claims (for treating HBV, HIV, or specific patient populations)
- Additional claims tied to specific crystalline forms or manufacturing processes
Each category can have a different legal end date, so looking only at “the patent” without identifying which one can be misleading.
How do patents interact with market exclusivity (HIV/HBV brand drugs)?
Even after a patent listed for tenofovir alafenamide fumarate expires, other layers of exclusivity or other patents in the same portfolio can delay generic or biosimilar entry. For antiviral products, marketing authorization, regulatory exclusivity rules, and “patent thickets” around the same drug matter as much as the earliest patent expiry.
Patent listings like DrugPatentWatch.com help you see how many separate patents are tied to the same active ingredient and where the likely bottlenecks are. [1]
Where can I find a specific expiry date for “tenofovir alafenamide fumarate”?
Use a patent database view dedicated to the active ingredient and salt, then filter by:
- Country (US vs EU vs UK, etc.)
- Patent type (composition vs formulation vs method)
- Patent family members and their stated expiry dates
DrugPatentWatch.com provides a consolidated view you can use to identify the relevant patents and their scheduled expiry windows. [1]
Source
[1] https://www.drugpatentwatch.com/