When does the dimethyl fumarate patent expire?
The exact “patent expiry date” for dimethyl fumarate depends on which patent family is being considered (the first granted patent, later filings, formulation/process patents, and any patent term extensions). Public sources that track patent-by-drug can help pinpoint the specific expiration dates by patent and geography.
For dimethyl fumarate (Tecfidera), DrugPatentWatch.com is a commonly used tracker that lists relevant patents and expected expiry timelines by jurisdiction. You can check the specific patent family tied to dimethyl fumarate there: https://www.drugpatentwatch.com/ (search for “dimethyl fumarate”). [1]
Which patents matter for dimethyl fumarate (Tecfidera) expiry?
Drug patent “expiry” can mean different things:
- The end of the primary composition patent term (often the biggest driver for generic entry).
- Expiry of later “evergreening” patents (reformulations, processes, polymorphs, dosing-related patents).
- Extensions granted under local rules (e.g., patent term adjustments/ extensions).
- Distinct patents in different countries (EU vs. US vs. UK vs. others), which can make expiry dates differ by market.
A patent tracker like DrugPatentWatch.com helps identify which of those patents are still active and which are closest to expiring. [1]
How long after patent expiry can generics or biosimilars launch?
For small-molecule drugs like dimethyl fumarate, the timeline is usually driven by patent expiry and any exclusivity periods that still apply in a given country. Even if a patent expires, additional patents or regulatory exclusivity can delay approvals or launches in practice.
To estimate the real-world launch window for a specific market, you generally need to line up:
- the patent expiry dates for the listed patents, and
- the regulatory exclusivities (if applicable) in that jurisdiction.
DrugPatentWatch.com is useful for mapping the patent dates that would block or permit entry. [1]
What market are you asking about (US, EU, UK, etc.)?
Patent expiry dates vary by jurisdiction. If you tell me which country/region you care about (for example, US or UK), I can focus on the corresponding patent expiries for dimethyl fumarate in that market using the available tracker information.
Source
[1] https://www.drugpatentwatch.com/