What if an idea was preposed, and not patented... and someone stole it and claimed it of their own, what could be the outcome? Can the developer of that idea take that patent for their own? Or basically, take back all their rights for the patent? What about the person/company that stole it, can they possible benefit from it?
One of the criteria for evaluating patent applications is novelty. The idea described in an application is not novel if it has been disclosed previously in whatever form - oral, written, through use or demonstration. Even a granted patent can be invalidated if it's proven to have been prematurely disclosed