Found one longer serving court: The Marshall Court (1812-1823) was together for 11 years between the appointment of Joseph Story and that of Smith Thompson with no changes at all. I found very few courts that were together for more than five or six years without a death or resignation leading to a new appointment. Depending on how long O'Connor, Stevens, and Rehnquist want to hang on, this court may make break a record. I hope not, but it could happen.