There is no magical ratio. Some say that there is a gap between the moment when an idea funded by research is sufficiently developed--up to being patented, even-- and the moment when it can be marketed.
The granting phase should be progressively reduced and eliminated to be replaced by private capital in order to ensure a continuum. We must begin by selecting, among the research projects, those that can be marketed. From then on, we might try to establish a reasonable ratio.