Kevlar is used in fiber-optic cable, tires, suspension bridge cable, safety helmets, and most famously in police and military bulletproof jackets.
She died at age 90 on June 18, 2014. She consulted for Dupont almost until the end and served on both the National Research Council and the National Academy of Sciences.
See Stephanie's story and interview in this short video.
Source Articles: Fascinating Facts About Stephanie Kwolek; Stephanie Kwolek Inventor of Kevlar; Stephanie's Wikipedia Page.