Business titan Maurice “Hank” Greenberg is pushing ahead with a claim that the judge assigned to his eight-year-old civil fraud case, Manhattan Supreme Court Justice Charles Ramos (See Profile), is biased, and on Thursday he persuaded an appellate justice to grant an interim stay of the proceedings.

Greenberg, the former chief executive officer of American International Group (AIG), and Howard Smith, the company’s former chief financial officer, complain that over the lengthy history of the case brought by the New York Attorney General’s Office, Ramos has been “aggressive and argumentative” toward the defense.