So you can't use patents of acquired companies...
(and you should probably correct the tooltip when buying out a company that states you DO get to use them...)
So I am to assume the patent continues to apply for assets in the acquired company, but nowhere else. As an aside I think an explanation of how you manipulate acquired companies post-purchase would be helpful, rather than just letting them run in whatever state they were in at the time. This is noticeable when a Robotic company acquires a non-Robotic company that was essentials-deficient, and all of sudden debt soars because the Robotic company has no means to provide for them.
Perhaps clearly indicating what interface aspects reflect YOUR company vs one you acquire. I assume the Cash and Debt is always yours, and I'm pretty sure stockpiles are combined...but otherwise what I see should reflect whichever company has my focus.
But back to patent mechanics:
Would there be a challenge in coding a routine that allows the patent to be "acquired" by the controlling company as well, simply by spending the $/chems you normally would?