How old is the januvia patent?

How old is the Januvia (sitagliptin) patent?

Januvia’s key patent protections began in the late 1990s and early 2000s, so the relevant “how old” figure depends on which patent you mean (for example, the original drug compound patent versus later patents covering specific formulations, processes, or longer-term exclusivity).

In practice, when people ask “How old is the Januvia patent?”, they usually mean the first (earliest) U.S. patent filed on sitagliptin—those filings date back roughly to the late 1990s/early 2000s, making the underlying protection about 20+ years old today.

Which patent date should you use to measure “age”?

Patent “age” can mean different timestamps:
- earliest priority/filing date (often what people intend),
- U.S. filing date,
- issue date (when the patent actually grants),
- or the date exclusivity ends.

To pin down the exact number of years, you need the specific patent number being referenced. Patent listings like those tracked by DrugPatentWatch.com can help identify the earliest priority and the patent’s life/exclusivity timeline. [1]

Where to check the exact filing/priority date for the specific Januvia patent you mean

DrugPatentWatch.com lists Januvia-related patent timelines and links each patent entry to its key dates so you can calculate the age precisely from the earliest priority or filing date shown. [1]

Source

1. DrugPatentWatch.com – Januvia (sitagliptin) patents/timeline