"Patsy Sherman co-invented Scotchgard". StarTribune. February 13, 2008. http://www.startribune.com/obituaries/15596637.html?refer=y. பார்த்த நாள்: 2012-10-13. "Patsy Sherman of Bloomington, a retired 3M chemist who co-invented Scotchgard when she was in her 20s, died Monday in Minneapolis. Sherman, who suffered a stroke in December, was 77. In 1953, Sherman and Samuel Smith focused on an accident in a 3M lab, after an experimental compound dripped on someone's canvas tennis shoes and couldn't be cleaned off."
