Alberto Scabone is 70 years old and has to serve another nine years in prison before he’s eligible for parole for killing his wife, and her sister and mother, in Newark in 1981. He now represents himself, and he’s still appealing what he believes is an excessive sentence – 80 years, with a mandatory minimum of 40. His latest appeal, issued Thursday, failed. The two judges dispatched his arguments in stark form: “Defendant’s sentence is not illegal.” And they ended it with, “The record establishes that defendant has been accorded all the process he is due.” Looking at his appeal history, an app…