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Stephanie Louise Kwolek (/ ˈkwoʊlɛk /; July 31, 1923 – June 18, 2014) was a Polish-American chemist best known for inventing Kevlar (poly-paraphenylene terephthalamide). Her career at the DuPont company spanned more than 40 years. [1][2] For her discovery, Kwolek was awarded the DuPont company's Lavoisier Medal for outstanding technical ...
Kevlar (para-aramid) [2] is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965, [3][2][4] the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires.
Children. Norma and Albert Jr. Marie Van Brittan Brown (October 30, 1922 – February 2, 1999) was an American nurse, her husband Albert L. Brown, an electronics technician. In 1966 they invented an audio-visual home security system [1][2] That same year they applied for a patent for their security system. It was granted three years later in 1969.
August 16, 1946 (age 78) Wilmington, Delaware, U.S. Political party. Democratic. Education. Delaware State University (BS) Boston College (MEd) Stephanie T. Bolden (born August 16, 1946) is an American politician. She is a Democratic member of the Delaware House of Representatives, representing District 2.
Anna Connelly was an American woman who lived from the mid-19th century to the mid-20th century in Pennsylvania. She was the inventor of the predecessor of the modern outdoor fire escape; her invention saved lives, causing it to become a safety component in modern buildings. In addition, she was one of the first women in the US to submit a ...
Website. sentry.com. Sentry Insurance is a mutual insurance company specializing in business insurance. The company’s home office is in Stevens Point, Wisconsin, where about half the company’s approximately 4,500 employees are located. Sentry offers property and casualty insurance, workers' compensation, life insurance, and other business ...
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