How old does the child have to be in order to take the father’s rights away?

I live in Missouri. I had a baby and the father is not involved in this case being. The father of my child has seen his child only once since he has was born and that was the day after he was born. The father has only spent half an hour total with my child. He has not purchased anything that the child needs. He does not contact me but I call him and give him opportunities to see him and he doesn’t take advantage of that.