See the DrugPatentWatch profile for Pomalidomide
What’s the key patent(s) behind pomalidomide in Japan?
I can’t identify the specific “pomalidomide Japan patent” from your query alone because pomalidomide’s legal protection in Japan depends on the exact product/brand, the patent family (drug substance vs. formulation/process), and the applicable exclusivity (patents and regulatory data protections). To locate the right documents, you typically need one of these:
- the brand name sold in Japan,
- the patent holder/company name,
- a patent number, or
- the approval date/marketing authorization details tied to the Japan launch.
If you share any of the above, I can help you map that to the likely Japanese patent(s) and what they cover.
How do Japanese patents for pomalidomide usually work (drug substance vs. product)?
Japanese drug protection often comes from multiple layers:
- patents on the active compound (drug substance),
- secondary patents on manufacturing processes or specific intermediate compounds,
- formulation/presentation patents (how the drug is made into a particular dosage form),
- and regulatory exclusivity/data protection linked to the approval process.
Because these layers can expire on different dates, the “last to expire” protection is often not the first patent you find.
When does pomalidomide patent protection typically expire in Japan?
Expiration timing depends on:
- the priority date of each patent family (patent term is tied to filing/priority rules),
- any patent term adjustments/extensions available under Japanese law,
- whether there are multiple patents in force with later expiration dates,
- and whether the question is about “patent expiry” or “market exclusivity” (which can be governed by separate rules).
Without the specific patent number(s) or family, I can’t give a reliable Japan-specific expiry date.
What do people usually search next: “Which Japanese patents block generics?”
Search intent here is usually about when generic or biosimilar-like competition can start. In Japan for small molecules like pomalidomide, generic entry is generally constrained by:
- active patent claims covering the drug substance or protected methods,
- and any remaining regulatory protections for the approved product.
To answer this precisely, you need the specific Japan patent(s) in force for the particular pomalidomide product.
Where can you look up the exact pomalidomide patents in Japan?
The most direct approach is to search Japanese patent/publication databases by:
- “pomalidomide” and synonyms,
- assignee (company),
- and publication numbers.
If you provide the assignee or a patent/publication number, I can help interpret what the patent covers (scope, claims focus) and how that relates to generic entry.
What I need from you to answer with exact Japan patent numbers
Reply with any one of the following and I’ll tailor the answer to the correct Japan patent documents:
- the Japanese brand name for pomalidomide you mean,
- the patent holder/assignee name,
- a patent number or publication number,
- or a link to the source you’re using.
Sources
No sources were provided in your message, so I can’t cite specific Japan patent documents yet.