Stephanie Louise Kwolek (July 31, 1923 – June 18, 2014) was an American chemist who is known for inventing Kevlar.
She was of Polish heritage and her career at the DuPont company spanned more than 40 years.
She discovered the first of a family of synthetic fibres of exceptional strength and stiffness: poly-paraphenylene terephthalamide.For her discovery, Kwolek was awarded the DuPont company's Lavoisier Medal for outstanding technical achievement.
As of February 2015, she was the only female employee to have received that honor.
In 1995 she became the fourth woman to be added to the National Inventors Hall of Fame.
Kwolek won numerous awards for her work in polymer chemistry, including the National Medal of Technology, the IRI Achievement Award and the Perkin Medal.