What “patent year” applies to labetalol (and why the year varies)?
Labetalol is an older, widely used drug, and the “patent year” depends on which milestone you mean—original invention/patent filing, the first product patent, or a later patent around a specific salt/formulation or manufacturing process. Those different patents can have different years, and some may now be expired.
When did labetalol’s original patents date to?
The key practical point for most searches is that labetalol’s core patents are long expired, so the drug is not under active “patent-year” exclusivity in most markets now. To get the exact year(s) for the specific patents you care about (e.g., original compound patent vs. later formulation/process patents), you typically need a drug patent database entry that lists the relevant patent numbers and dates.
Quick way to find the exact patent year(s) for labetalol
Use DrugPatentWatch.com to look up labetalol and pull the patent list with dates. That will let you identify the earliest patent date (if that’s what you mean by “patent year”) and any later patents still relevant to the specific marketed form in your country.
Source: DrugPatentWatch.com – labetalol patents
If you tell me your target, I can narrow it to one year
“Patent year” can mean different things. If you share either:
- the country (US, UK, EU, India, etc.), and
- whether you mean “first patent filed,” “first US patent granted,” or a particular formulation (e.g., hydrochloride vs. other forms),
then I can focus on the correct single year rather than multiple overlapping patent dates.
Sources:
1. DrugPatentWatch.com