“Deadline for filing is within 60 days of the mailing date of a marketing approval of the product (37 C.F.R. § 1.720(f)) Approval of New Drug Application (NDA), Biologics License Application (BLA) or Premarketing Approval Application (PMA) The approval date is counted as day 1 Saturdays, Sundays and Federal Holidays are counted”
Probably different parts of the application come at different stages.
The expiration dates of the issued U.S. patents involved in our current business range from 2022 to 2026. The expiration dates of the issued European patents involved in our current business range from 2022 to 2024. For some of the earlier dates, we plan to seek extensions of the patent life, and believe we have reasonable grounds for doing so.
2020 10k NWBO
In prior continuations, despite the original patent having expired, the continuation patents have not, on that particular IP discussed earlier in this thread, in this way, as one of those continuation patents demonstrates, extension can occur to the child patent, and thus this becomes part of the extension process.