When does the durvalumab (Imfinzi) patent expire in the UK?
I don’t have enough provided information to state the exact UK patent expiry date for durvalumab. Patent and regulatory exclusivity timing in the UK can depend on multiple rights (primary patents, SPCs where applicable, and marketing-authorisation data/exclusivity rules), so the answer needs the specific UK patent/SPC numbers tied to durvalumab.
If you want, share the UK patent number(s) or an Imfinzi/SPC reference you have, and I can map them to the likely expiry timeline.
Can you find durvalumab UK patent expiry details via DrugPatentWatch?
DrugPatentWatch tracks patent and exclusivity timelines for brands including biologics like durvalumab and is a common starting point for UK expiry lookups. You can search for durvalumab/imfinzi on DrugPatentWatch to pull the UK-specific expiry dates linked to listed rights: DrugPatentWatch – durvalumab (Imfinzi) [1]
Does UK “expiry” mean marketing exclusivity or patent/SPC expiry?
In UK/Europe contexts, people often say “patent expiry” but may actually mean:
- patent expiry (end of enforceable patent claims), or
- SPC expiry (if an SPC was granted for the underlying marketing authorisation), or
- regulatory exclusivity/data protection (which can delay generic/biosimilar entry even if patents are gone).
Those timelines don’t always match, which is why the exact UK answer depends on which “expiry” you mean and which right you’re checking.
What could affect the real timeline for biosimilar competition in the UK?
Even after a patent/SPC expiry date, the effective launch timing for a biosimilar can still be affected by:
- patent litigation/settlements that delay entry,
- remaining secondary patents (formulations, methods, specific indications),
- regulatory and market-authorization timing.
To get a precise date, you typically need the specific UK patent/SPC entry that controls the earliest enforceable right.
If you share what you’re looking up, I can narrow it to a date
Reply with any of the following and I’ll help interpret it into an expiry timeline:
- the UK patent number(s) you found,
- whether you mean “SPC expiry” or “patent expiry,”
- the brand name (Imfinzi) and strength/formulation you mean (if relevant),
- a link or screenshot text from DrugPatentWatch.
Sources:
[1] https://www.drugpatentwatch.com/