If somebody created a free energy device what would its chances be of making it to market?

If somebody created an idea to create free abundant energy from a simple device that was just overlooked by modern science, and that person wanted to try to make something off the idea, how would someone do that? The patent office would reject it because it is a perpetual motion design which is not allowed by the patent office for some reason or another. How would you get past the influence of the existing energy companies which power and influence are directly interconnected with the government? You wonder how many designs have been squashed by fossil fuel interests which stretch into the financial fabric if the entire country. Since this exists they can leverage the politicians they have been funding to execute the patent office gag order 181 so it is permanently deleted from history, if the inventor is lucky, otherwise I'm sure they could arrange for an unfortunate accident to happen which I'm sure would be cheaper than a payout or letting it go to market and watch their product become "antiquated" other than lubrication purposes. That is why "in my opinion" there will never be a free energy device. Not because it is impossible, but it is not economically viable in a fossil fuel addicted and controlled country.