Inventor
ROARK DAVID N
US9 patents
⚠️ This page may combine multiple inventors who share the name “ROARK DAVID N”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ETHYL CORP
8 patentsUS4706755ANov 17, 1987
Fluid loss control in well cement slurries
ETHYL CORP26 citations91
US4657948AApr 14, 1987
Fluid loss control in well cement slurries
ETHYL CORP31 citations91
US4859530AAug 22, 1989
High temperature adhesive for polymide films
ETHYL CORP37 citations88
US4614593ASep 30, 1986
Demulsification of oil-in-water emulsions
ETHYL CORP19 citations81
US4963649AOct 16, 1990
Copolyimide aromatic sulfone-fluoroaliphatic resin composition
ETHYL CORP12 citations73
US4661263AApr 28, 1987
Water clarification
ETHYL CORP6 citations72
US4927896AMay 22, 1990
Process for polymerizing monoallylamine
ETHYL CORP4 citations61
US4698380AOct 6, 1987
Fluid loss control in well cement slurries
ETHYL CORP1 citations50