Cole I live in Ohio but i"m NOT a lawyer. Short answer is YES your Dad would still own the rights. That company that is going to pay $$$ for the oil lease will do a title search and look for the mineral owners with a legal notice in the local paper. If not found then the mineral rights MAY go back to the property owner. You need to talk to a lawyer in the Ohio county that the property is located to see how the rights can be transfered from your Dads estate to you.