Wholly aromatic carbocyclic polycarbonamide fiber having orientation angle of less than about 45 degrees
- Filed
- 7 September 1971
- Granted
- 25 June 1974
- Assignee
- E. I. du Pont de Nemours and Company
Polymer chemistry
Stephanie Kwolek: inventions and patents
Known for Discovery of liquid crystalline polymer solutions that led to Kevlar fibreNationality Born in New Kensington, Pennsylvania, United States31 July 1923 to 18 June 2014
Stephanie Kwolek was a chemist at DuPont who, while working on stronger and stiffer fibres, discovered liquid crystalline polymers that led to Kevlar. The National Inventors Hall of Fame describes Kevlar as five times stronger than the same weight of steel and lists uses including bullet-resistant vests, mooring ropes and aircraft parts. She was inducted into the Hall of Fame in 1995.1
Patents
Inventions
- Kevlar aramid fibre. A polymer fibre developed at DuPont from liquid crystalline polymer solutions, used in bullet-resistant vests, ropes, fibre-optic cables and aircraft parts.1
Recognition
- 1995 Inducted into the National Inventors Hall of Fame1
Sources
- National Inventors Hall of Fame, Stephanie Louise Kwolek (accessed 2026-10-27)
- Google Patents, US3819587A Wholly aromatic carbocyclic polycarbonamide fiber (accessed 2026-10-27)