In Agile, you are supposed to ship product on a regular cadence. All features are added to a product backlog, divided into small projects that fit within a sprint, and then prioritized. The backlog is just a way to keep track of all of the ideas people have, requests from customers, major bugs and other things.
The first patent for Pristiq is set to expire in February 2022. This is the earliest predictable date that a generic version of the drug could become available. However, other circumstances could come up to extend or shorten the exclusivity period.
According European Patent convention expiry of European patent if it is not withdrawn, abandoned, revoked or lapsed is 20 year from filing date; it can be extended by contracting state; Article 63[ 53 ] Term of the European patent. Art. 2. (1) The term of the European patent shall be 20 years from the date of filing of the application.