When does the estradiol valerate patent expire?
You can’t pin down a single “estradiol valerate patent expiration” date from the drug name alone. Patents are filed for specific products and formulations (for example, particular dosage forms like tablets or injections, specific strengths, manufacturing methods, or extended‑release versions). Estradiol valerate itself is an older active ingredient, so multiple patents—and sometimes none relevant to a given marketed product—can apply depending on the country and the exact version being sold.
How to find the right expiration date for a specific estradiol valerate product
To get the correct expiration, you need at least:
- The country (US, EU, UK, etc.).
- The exact product name and strength (for example, an injection vs a tablet).
- The manufacturer/marketing authorization holder.
With that, you can look up:
- The active ingredient-related patents (composition/use).
- Product/formulation patents (how it’s made or delivered).
- Regulatory exclusivities (which can extend market protection even when a patent term ends).
What to check in the US (often what people mean by “patent expiration”)
In the US, market protection for prescription products can involve both patent term and regulatory exclusivity periods. For estradiol valerate, the relevant “expiration” date may reflect the patent(s) listed for that specific NDA/ANDA product plus any applicable FDA exclusivity, rather than a single drug-wide patent.
Why different websites show different “expiration” dates
Different sources may be answering different questions:
- Patent expiry for a specific patent number (which can vary by claim and jurisdiction).
- Exclusivity expiry for the application approval (may not match patent expiry).
- Generic entry timing (which also depends on litigation, risk/settlement terms, and whether the generic challenges listed patents).
If you tell me the product, I can narrow it to the correct patents
Reply with the exact product you mean (example: “estradiol valerate injection X mg by Y manufacturer” and the country, or the NDA/ANDA number). Then I can identify the likely patents/exclusivity that control when that exact product’s market protection ends.
Sources
No source material was provided in your prompt, so I can’t cite patent-expiration dates accurately.