DR

David C. Rohlfing

Chevron: 18 patents #227 of 4,788Top 5%
PP Phillips Petroleum: 8 patents #209 of 1,401Top 15%
📍 Bartlesville, OK: #62 of 1,143 inventorsTop 6%
🗺 Oklahoma: #260 of 12,736 inventorsTop 3%
Overall (All Time): #147,023 of 4,157,543Top 4%
27
Patents All Time

Issued Patents All Time

Showing 26–27 of 27 patents

Patent #TitleCo-InventorsDate
5710224 Method for producing polymer of ethylene Helmut G. Alt, Syriac J. Palackal, M. Bruce Welch, Jay Janzen 1998-01-20
4628013 Photoelectrochemical cell Joseph E. Figard, Ralph S. Becker 1986-12-09