Laurence W. McKeenLarry McKeen has a Ph.D. in Chemistry from the University of Wisconsin and worked for DuPont Fluoroproducts from 1978–2014. As a Senior Research Associate (Chemist), he was responsible for new product development including application technology and roduct optimization for particular end-uses, and product testing. He retired from DuPont at the end of 2014 and is currently a consultant. Read More Read Less