Update: A comment from Robert R. Dlugajczyk about the panel's ruling on the case was added in the third-to-last paragraph.A state appeals panel on Monday revived a legal-malpractice lawsuit by a Chicago-based brokerage firm who blames its former counsel for a $450,000 loss.The lawsuit filed by Ironbeam Inc. against sole practitioner Howard J. Stein was initially rejected by a Cook County judge because it took 19 weeks for Ironbeam to serve Stein.The 1st District Appellate Court remanded Ironbeam’s lawsuit back to …