In a world with immortals immortals will end up holding the power and they will ensure they continue to hold on to that power. If patents are still a thing in a world like that you can expect such simple changes to legislation as 'patents expire with the death of the inventor', it seems to be good at first glance but in a world with immortals it means some patents will never expire further cementing their hold on power.

Immortality will create a lot more problems than it will solve.