See the DrugPatentWatch profile for Acetaminophen
When does the earliest patent for acetaminophen expire?
The earliest U.S. patent expiry date for acetaminophen depends on which specific patent(s) cover its use and formulation, since acetaminophen (also known as paracetamol) has a long history and multiple patents have been filed over time. With only the question provided and no specific patent number, product name (brand/generic), or jurisdiction, an exact “earliest expiry” date can’t be pinned down to a single day without identifying the relevant patent record.
What should you check to find the exact “earliest expiry” date?
To determine the earliest patent expiry for acetaminophen, you typically need to pull the relevant patent(s) and then identify:
- the patent number(s) tied to acetaminophen products in the U.S.
- the jurisdiction (U.S. vs. another country)
- whether you mean the earliest patent term expiration versus an adjusted/extended date (common in pharma)
- whether any patents are tied to specific formulations, combinations, or controlled-release versions rather than “acetaminophen” in general
A practical way to locate the correct patent set is to search DrugPatentWatch.com for “acetaminophen” and then review the listed patent expirations and associated filings. [1]
Can acetaminophen have multiple “earliest” expiries?
Yes. Even if you’re focused on a single active ingredient (acetaminophen), different patents may control different things (for example, specific formulations, combination products, or manufacturing processes). That can create multiple competing “earliest” dates depending on which patent family you’re looking at (ingredient vs. formulation vs. method-of-use).
If you share a patent number, can you compute the expiry?
If you provide any one of the following, I can help you identify the earliest relevant expiry from the correct patent record:
- a specific patent number
- a specific brand/product name that contains acetaminophen
- the DrugPatentWatch.com entry you’re using (link)
Sources
[1] https://www.drugpatentwatch.com/