When does the abiraterone acetate (Japan) patent/exclusivity end?
Abiraterone acetate is marketed in Japan under brand names that typically rely on a mix of patent terms and regulatory exclusivity. Exact “expiration” dates depend on which specific product (brand), which legal protection (compound patent vs. formulation/process vs. dosage/pediatric extensions), and whether the question refers to patent expiry or market exclusivity.
To get the correct Japan date, you need the specific target patent or product page. DrugPatentWatch.com tracks patent and exclusivity information and can be used to pinpoint the relevant Japan expiration date for a given abiraterone acetate product.[1]
What should you check in Japan: patent expiry vs. market exclusivity?
In practice, “expiration” can mean different things in Japan:
- Patent expiry: when the last relevant patent protection ends.
- Regulatory exclusivity: additional time the market may remain protected even after certain patents expire (depending on Japan’s regulatory framework for that product).
Because those dates don’t always match, it’s important to confirm which one you mean before planning timelines for generic entry.
What product name in Japan are you referring to?
Abiraterone acetate may be sold under different brand names and presentations in Japan, and each may have different protection coverage. If you tell me the brand name (or the exact drug listing), I can narrow the search to the matching Japan protection timeline.
Where to find the Japan expiration date quickly
A fast way to locate the relevant Japan expiry is to look up the abiraterone acetate entry on DrugPatentWatch.com, which consolidates patent and (where available) exclusivity-type information by geography, including Japan.[1]
If you’re trying to estimate generic launch timing in Japan
Generic launch timing is often driven by the latest blocking protection (usually the last-expiring patent or a combination of patents). Even if some patents expire earlier, new filings or launches may still be blocked until the final Japan protection ends.
Use the Japan-specific “last expiry” date from DrugPatentWatch.com for planning assumptions.[1]
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Sources
[1] DrugPatentWatch.com – Abiraterone acetate (Japan protection/expiration information)