bill cullen invented the first down line on tv.
who invented the first down line on tv?
bill cullen
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in 1835, henri victor regnault, a french chemist left vinyl chloride in the sun and found white solid at the bottom of the flask which was polyvinyl chloride. in 1839 eduard simon, discovered polystyrene by accident by distilling storax. in 1856, william henry perkin discovered the first synthetic dye, mauveine. in 1888, friedrich reinitzer, an austrian plant scientist observed cholesteryl benzoate had two different melting points. in 1909, leo hendrik baekeland invented bakelite made from phenol and formaldehyde. in 1928 synthetic fuels invented using fischer-tropsch process. in 1929, walter bock invented synthetic rubber buna-s which is made up of styrene and butadiene and used to make car tires. in 1933, otto röhm polymerized the first acrylic glass methyl methacrylate. in 1935, michael perrin invented polyethylene. after world war ii, polypropylene was discovered in the early 1950s. in 1937, wallace hume carothers invented nylon. in 1946, he invented polyester. polyethylene terephthalate (pet) bottles are made from ethylene and paraxylene. in 1938, otto bayer invented polyurethane. in 1941, roy plunkett invented teflon. in 1949, fritz stastny turned polystyrene into foam. in 1965, stephanie kwolek invented kevlar.
petrochemical