GMOs aren't solving world hunger

[FluffyMcDeath]

for applications filed on or after June 8, 1995, the patent term is 20 years from the filing date of the earliest U.S. application

I expect patent extensions will follow the path of copyright extensions. Big patent holders will argue for it - government will roll over. There was no good reason to extend patents in 1995 except to make some companies extra money on old work. They'd love to try and get retroactive extensions like Disney managed to get for copyright.
But the way pharma companies are doing it these days is they apply a tweak to whatever molecule they are dealing and get a new patent on what is fundamentally the same thing and then try to run the old product off the market before the generics get to making it. Monsanto has a much better model for running non-patents out of the market than the drug companies do.