Workers compensation was the exclusive remedy for a man who developed asbestos-related mesothelioma more than a decade after a deadline had run out for seeking occupational disease-related benefits, a split Illinois Supreme Court ruled Wednesday in a case closely followed by employers and insurance industry groups. James Folta worked as a shipping clerk and product tester for Ferro Engineering, a division of Cleveland-based On Marine Services Co., from 1966 to 1970, court records show.