E.I. du Pont de Nemours and Co. came to Washington-based Crowell & Moring with a problem in 2007.

The Wilmington, Del.-based chemical giant was worried that South Korean textile company Kolon Industries Inc. might be knocking off Kevlar, a DuPont invention used in ballistic vests. It took four years of work, but Crowell and co-counsel McGuireWoods helped win a $919.9 million jury verdict for DuPont in the U.S. District Court for the Eastern District of Virginia. The sum in E.I. du Pont de Nemours & Co. v. Kolon Industries Inc. was the biggest contested verdict on record in a trade secrets case.