DC

Donald J. Clarke

Chevron: 2 patents #1,772 of 4,788Top 40%
📍 Cold Spring, NY: #30 of 66 inventorsTop 50%
🗺 New York: #48,759 of 115,490 inventorsTop 45%
Overall (All Time): #2,333,767 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4877834 Lubricating oil containing a Mannich base Christopher S. Liu, Larry D. Grina 1989-10-31
4780230 Lubricating oil containing a mannich base Christopher S. Liu, Larry D. Grina 1988-10-25