Last appeal to CAFC , it took 18 months from filing to final decision. And from Casper sent to PTAB total time 2 years to be done at PTAB. So I guess will take average 18 months to get result from CAFC . However, CAFC just took very short time in VRNG case , do not know why. If I remember correctly VRNG vs Google about 4-4.5 years done.