Imposing limits on intellectual property for public benefit is nothing new, though. Expiration terms, for example.
So the system might still work fine even if all patents get shut down when a company that acquired them does.
It's not what I suggested, though: just that a non-practicing (at least in some sense) company can't litigate.
That would mean that you can sell your patents to some shell company even. But the recipient couldn't sue anybody over them until they either start a profitable business on the side relating to said patents. Or they resell it again to a company that satisfies the requirements. Or have a lump sum set aside in escrow, I guess.
So the system might still work fine even if all patents get shut down when a company that acquired them does.
It's not what I suggested, though: just that a non-practicing (at least in some sense) company can't litigate.
That would mean that you can sell your patents to some shell company even. But the recipient couldn't sue anybody over them until they either start a profitable business on the side relating to said patents. Or they resell it again to a company that satisfies the requirements. Or have a lump sum set aside in escrow, I guess.