Stepchild adoption in Ohio

My daughter is 2 and a half years old. She hasnt seen her biological father in over a year. He never bothered to come around. However he was paying child support until February of this year. I have remarried and my husband wants to adopt her. I have no idea where her biological father is he may possibly have returned to Mexico. I know he wouldnt sign his rights away. So how long since he has had no contact or payed child support is it considered abandonment so I can get his rights without consent so my husband may adopt her