Philip J. Rennolds

EA E.I. Du Pont De Nemours And: 3 patents #2,229 of 8,010Top 30%

📍 Wilmington, DE: #1,229 of 3,182 inventorsTop 40%

🗺 Delaware: #2,574 of 7,163 inventorsTop 40%

Overall (All Time): #1,683,961 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4423248	Process for zone refining with a helical solution zone	—	1983-12-27
4255390	Corrugated interface zone refiner	—	1981-03-10
4196042	Corrugated interface zone refiner	—	1980-04-01