Pentadiene

I have successfully entered the anxious phase. For the entire December I did not even think about grad school, but last week I got my first rejection letter from a small cancer bio program (which is completely normal since I do chemistry lol), so here we go. For the schools that interview, do they generally interview everyone/most people who has a chance? If I do not get interview requests at the time they send those out, does that mean I have already been eliminated? Or does that depend on school and some just interview people that they are not sure of (I guess?) I just really wanna get into Princeton lol. Please. Chemistry god.