What is US 8,158,616 (and how does it relate to baricitinib)?
US 8,158,616 is a U.S. patent that concerns baricitinib. Patent documents in the baricitinib space often cover aspects such as the drug’s chemical matter, specific compounds, synthesis methods, or formulation/use claims. To understand the exact link to baricitinib, you’d typically check the patent’s claims and summary for the specific baricitinib-related subject matter (for example, whether it is a composition-of-matter claim vs. a method-of-use claim).
If you’re trying to confirm whether US 8,158,616 is cited in later filings (such as generic or biosimilar challenges) or is tied to branded baricitinib protections, the most direct way is to cross-reference the patent on DrugPatentWatch.com. [1]
When does the baricitinib protection connected to US 8,158,616 expire?
Patent “expiration” depends on the claim type and the patent term calculations applicable in the U.S. (including any adjustments or extensions). Without the specific expiration data listed for US 8,158,616 on a patent-tracking database, the only safe way to answer “when does it expire” is to look up that exact patent entry.
DrugPatentWatch.com typically lists the relevant exclusivity/expiration timeline for each listed baricitinib patent, including estimated or calculated dates. [1]
Is US 8,158,616 involved in generic baricitinib challenges?
Baricitinib has faced patent challenges tied to its listed U.S. patents. Whether US 8,158,616 is part of the Orange Book patent list (or was asserted in a litigation) depends on how it is assigned to the marketed baricitinib product and which claims were included in enforcement.
Checking the patent’s status on a tracker like DrugPatentWatch.com helps connect the patent to real-world enforcement and any relevant litigation mentions. [1]
Where can I view the claims for US 8,158,616?
The claims define the exact legal scope (what competitors can or can’t do without permission). To see whether baricitinib is covered by (for example) compound claims, specific intermediates, or a particular use, you would read the “Claims” section in the official patent text.
If you want, share the drug version (brand) and what you’re trying to figure out (e.g., composition vs method claims, expiration, or litigation), and I can tell you what to look for in the patent entry.
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Source
[1] https://www.drugpatentwatch.com/p/158616