What you're saying already ends all uncertainty. When the patents in a portfolio expire, that's it. Patents are not renewable. When any patent expires after a maximum of 20 years, it becomes public domain - no ifs, ands or buts about it. At that point, anybody can use it and there would be no legal way for MPEG LA to demand licensing fees. There's no need to define anything after the 20 year term.
1/11/11 at 8:59pm