Claiming Fathers Property

My father & Mother got divorced in 1985. I am staying with my mother from since then. As per court order my father was suppose to give monthly compensation to us, in initial days he gave us but afterwards he discontinued paying. And later on he never shows interest to see me or my mother, I never saw him or he never comes to see me. Not only he disobeyed the courts order but also he ignores his responsibilities. Now after 29 years if I wants to Sue him what charges I can file against him, & how much percentage I can claim in his property, because he remarried and staying in some other city. Please let me know your suggestions. Thanks.