![Lloyd H. Conover developed tetracycline, which became one of the most widely used drugs of its kind.](/web/20170315025408im_/http://www.smh.com.au/content/dam/images/g/u/y/d/6/l/image.related.wideLandscape.460x259.guyc65.png/1489544352119.jpg)
Chemist whose breakthrough invention produced antibiotic tetracycline
Lloyd H. Conover, a chemist whose breakthrough invention of one of the most effective and widely prescribed antibiotics, tetracycline, led to a new approach to developing such drugs, has died in St. Petersburg, Florida, aged 93.