RE

Roger R. Ellefson

EA E.I. Du Pont De Nemours And: 1 patents #4,343 of 8,010Top 55%
📍 Wilmington, DE: #2,050 of 3,182 inventorsTop 65%
🗺 Delaware: #4,431 of 7,163 inventorsTop 65%
Overall (All Time): #4,003,799 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4618702 Manufacture of butanedicarboxylic acid esters Michael B. D'Amore 1986-10-21