Question: What year was the high strength synthetic fiber, which was the subject of a lawsuit between DuPont and Kolon Industries, developed?

Related documents: [0]  [DOC] DuPont v. Kolon Industries is an intellectual property lawsuit centering on the allegation that Kolon Industries (of ), a South Korea-based company, stole trade secrets concerning the production and marketing of Kevlar from DuPont, an American chemical company. Kevlar is a high strength synthetic fiber used in applications as diverse as bicycle tires and body armor. On September 14, 2011, a jury found in favour of DuPont and awarded damages of $919.9 million. A 2015 settlement reduced the damages to $275 million. [END] 
[1]  [DOC] Kevlar is the registered trademark for a para-aramid synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965, this high-strength material was first commercially used in the early 1970s as a replacement for steel in racing tires. Typically it is spun into ropes or fabric sheets that can be used as such or as an ingredient in composite material components. [END]  
Answer: 1965
1965