Once Klonopin has been taken it will take a minimum of 2 days before the Klonopin is about 50% out of your system.
But since Klonopin has a 30 to 40-hour half-life it can take a full 6 to 9 days for the Klonopin to fully leave your system and no longer be able to be detected in your urine.
So after 9 days the Klonopin should not be able to be detected in your urine.