DM

Donald K. MacQueen

PP Phillips Petroleum: 2 patents #574 of 1,401Top 45%
Overall (All Time): #2,362,114 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4406743 Fractionation column for reclaiming used lubricating oil William E. Wood 1983-09-27
4381992 Reclaiming used lubricating oil William E. Wood 1983-05-03