want right of birth parents

If you have been legally adopted and stated parent's name that of adopted parents, you are not having any rights /claims in your original parent's property.

If you were a minor (below 18 years) at the time of your adoption and if you have not derived any benefits from your adoptive parents after you became a major, you can make claims on your biological parents stating that you were given in adoption without your mature consent, because your biological parents wanted to get rid of you.