Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DR

David N. Roark

ETEthyl: 8 patents #60 of 494Top 15%
ALAlbemarle: 1 patents #228 of 439Top 55%
Baton Rouge, LA: #222 of 1,896 inventorsTop 15%
Louisiana: #692 of 10,876 inventorsTop 7%
Overall (All Time): #589,461 of 4,157,543Top 15%
9 Patents All Time

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
6110387 Sulfamate stabilization of a bromine biocide in water Pranab Choudhury, Robert L. Davis, Michael Sanders 2000-08-29
4963649 Copolyimide aromatic sulfone-fluoroaliphatic resin composition William E. Wright 1990-10-16
4927896 Process for polymerizing monoallylamine Wesley C. Blocker, Edwin D. Hornbaker 1990-05-22
4859530 High temperature adhesive for polymide films Jules A. Lambert 1989-08-22
4706755 Fluid loss control in well cement slurries Adam T. Nugent, Baldev K. Bandlish 1987-11-17
4698380 Fluid loss control in well cement slurries Adam T. Nugent, Baldev K. Bandlish 1987-10-06
4661263 Water clarification 1987-04-28
4657948 Fluid loss control in well cement slurries Adam T. Nugent, Baldev K. Bandlish 1987-04-14
4614593 Demulsification of oil-in-water emulsions 1986-09-30