Okla. Stat. tit. 10, § 10-7505-6.5: Effect of final decree - Grandparental rights

A. After the final decree of adoption is entered, the relation

of parent and child and all the rights, duties, and other legal

consequences of the natural relation of child and parent shall

thereafter exist between the adopted child and the adoptive parents

of the child and the kindred of the adoptive parents. From the date

of the final decree of adoption, the child shall be entitled to

inherit real and personal property from and through the adoptive

parents in accordance with the statutes of descent and distribution.

The adoptive parents shall be entitled to inherit real and personal

property from and through the child in accordance with said

statutes.

B. After a final decree of adoption is entered, the biological

parents of the adopted child, unless they are the adoptive parents

or the spouse of an adoptive parent, shall be relieved of all

parental responsibilities for said child and shall have no rights

over the adopted child or to the property of the child by descent

and distribution.

C. A grandparent, who is the parent of the minor's biological

parents, may be given reasonable rights of visitation to the child,

only to the extent permitted by the provisions of Section 5 of this

title.

D. A decree of adoption does not affect any property right or

benefit vested in the child before the decree becomes final.