"it becomes publically accessible 20 years later when the patents expire" I'm about 90% sure this is the opposite of how patents work. You describe the methods

"it becomes publically accessible 20 years later when the patents expire" I'm about 90% sure this is the opposite of how patents work. You describe the methods in the patent, and in exchange you get to use or license it for the duration of the patent. It's publicly accessible but not usable, which is a useful distinction. Without patents there wouldn't be an incentive to disclose.