Anna Usacheva said the court session was scheduled for August 11.
Inna Gudavidze has demanded that the court annul Patarkatsishvili's 1997 marriage to Olga Safonova as the businessman had married Gudavidze in 1979 and that first marriage was still in effect.
"The marriage between Inna Gudavidze and Badri Patarkatsishvili remained valid de jure and de facto until his death," the plaintiff said in a statement. "Of interest is the fact that Gudavidze learned about Patarkatsishvili's 'second' marriage after his death."
Gudavidze's lawyers said the lawsuit was aimed at clarifying claims to the late businessman's estate.
The estate of Patarkatsishvili, a former business partner of fugitive Russian billionaire Boris Berezovsky, has also been claimed by his distant cousin Joseph Kay.
Some media earlier reported Berezovsky's statement that Patarkatsishvili fathered a son with Safonova, and that she has lodged a suit with a British court pursuing her rights to the estate.
Patarkatsishvili, who was also an opposition leader in Georgia, died at his U.K. home in February 2008. Some estimates put his fortune at $12 billion.
