JE

John M. Elsen

PP Phillips Petroleum: 1 patents #819 of 1,401Top 60%
Overall (All Time): #3,951,637 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4743383 Drilling fluid additives for use in hard brine environments Wayne S. Stewart, George G. Dixon, Billy L. Swanson 1988-05-10