tl;dr; He is a retired attorney and a "firm believer in the patent system” so he filed for re-examination. A random google search gives the costs mere mortals

tl;dr; He is a retired attorney and a "firm believer in the patent system” so he filed for re-examination. A random google search gives the costs mere mortals can expect for that (source: https://www.lventre.com/reexam.html https://www.lventre.com/reexam.html) > Ex parte reexaminations. Expect total costs to be $20,000 - $45,000.