FD

Frederick W. DeVries

EA E.I. Du Pont De Nemours And: 2 patents #2,942 of 8,010Top 40%
📍 Chadds Ford, PA: #87 of 258 inventorsTop 35%
🗺 Pennsylvania: #23,606 of 74,527 inventorsTop 35%
Overall (All Time): #1,659,644 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5271849 Process for treating waste containing cyanates 1993-12-21
4425307 Hydrogen peroxide in sulfuric acid extraction of uranium ores 1984-01-10
4311341 Restoration of uranium solution mining deposits Bernard C. Lawes 1982-01-19