[Kequc]

It depends what you've signed, and what what you've signed says. All good contracts describe what happens in the worst case scenario and backwards from there. If it isn't one of those contracts it depends on the court, if it went to court. I'd imagine since it isn't yet earning money it wouldn't go to court soon.

It might be a good idea to seek a lawyer for a sit-down, that will cost you a little bit of money but they can give you a better overview of your situation. Send all paperwork you have ahead of the consultation.

It could boil down to be as simple as discussing the issue openly with him. That you want to keep working on it and that if he doesn't, would he mind signing it (whatever it is) over to you. If so, it's easy.

No matter what happens, if you feel that he is isn't the best partner to have on the project it's going to be easier to deal with now than it will be the longer you leave it.