Not sure what exactly the question.
After final rejection, if there is no claim allowed, then the prosecution should end. While, we know it really does not end that way but that is the procedure of prosecution. If there are some claims allowed, then the applicant must remove rejected claims and put the application in a form of acceptance. Final rejection will start the 6 months clock that nothing will stop it except an appeal, or otherwise the application will be abandoned. As I said, appeal will stop the clock and prolong the life of the application.
In the second situation, the examiner may suggest a word to word copy of another application to start an interference. That will also ensure the applicaiton will have another life in the interference proceeding. Refuse to copy will result in the abandonment of the application immediately.
