Does nusinersen’s patent expire at the same time for everyone in India?
Nusinersen (brand name Spinraza) is protected in India by patents and related exclusivities that can differ by claim and by product/process. The exact “expiry date” depends on which specific Indian patent(s) are being considered and whether any of them are granted, challenged, or expire due to patent term calculations.
What is the patent-term framework in India?
In India, most pharmaceutical patents run for 20 years from the application filing date (subject to how the filing date is defined for that specific patent and any patent-specific adjustments). Without the exact Indian patent publication numbers and filing dates, a single definitive expiry date for “nusinersen” can’t be stated accurately.
What information is needed to give the exact expiry date for India?
To determine the precise expiry for nusinersen in India, you need at least one of the following:
- the relevant Indian patent number(s) (or publication number) covering nusinersen in India, or
- the filing/application date(s) for those specific Indian patents, and confirmation they are the “first” patent(s) in the chain determining term.
With that, the term can be calculated and cross-checked against the Indian patent record.
Can generic or biosimilar versions enter immediately after the last patent expires?
Even after a patent expires, market entry may still be affected by:
- any other still-active patents covering the same product,
- regulatory requirements for approval, and
- potential ongoing litigation or additional patent claims that remain in force.
If you share a patent number, can you compute the exact expiry?
Yes. If you provide the Indian patent publication number(s) you mean (for example, the IN patent number that covers nusinersen), I can calculate the expected expiry date using the India patent-term rule and explain what else could still block entry.
Sources
None provided.