DL

David B. Litzen

Shell Oil Compny: 2 patents #1,477 of 4,423Top 35%
📍 Houston, TX: #8,651 of 21,073 inventorsTop 45%
🗺 Texas: #52,441 of 125,132 inventorsTop 45%
Overall (All Time): #2,283,185 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5583263 Process of making ketones Duraisamy Muthusamy, Chia-Chung Wang, Richard Dale Swain, William Ridley Pledger 1996-12-10
4762616 Isopropyl alcohol purification process Stephen R. Bolger 1988-08-09