David N. Roark

Person

Baton Rouge, LA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Sulfamate stabilization of a bromine biocide in water
- Patent number 6,110,387
- Issue date Aug 29, 2000
- Albemarle Corporation
- Pranab Choudhury
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Copolyimide aromatic sulfone-fluoroaliphatic resin composition
- Patent number 4,963,649
- Issue date Oct 16, 1990
- Ethyl Corporation
- William E. Wright
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Process for polymerizing monoallylamine
- Patent number 4,927,896
- Issue date May 22, 1990
- Ethyl Corporation
- Wesley C. Blocker
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
High temperature adhesive for polymide films
- Patent number 4,859,530
- Issue date Aug 22, 1989
- Ethyl Corporation
- David N. Roark
- B32 - LAYERED PRODUCTS
Information Patent Grant
Fluid loss control in well cement slurries
- Patent number 4,706,755
- Issue date Nov 17, 1987
- Ethyl Corporation
- David N. Roark
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Fluid loss control in well cement slurries
- Patent number 4,698,380
- Issue date Oct 6, 1987
- Ethyl Corporation
- David N. Roark
- E21 - EARTH DRILLING MINING
Information Patent Grant
Water clarification
- Patent number 4,661,263
- Issue date Apr 28, 1987
- Ethyl Corporation
- David N. Roark
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Fluid loss control in well cement slurries
- Patent number 4,657,948
- Issue date Apr 14, 1987
- Ethyl Corporation
- David N. Roark
- E21 - EARTH DRILLING MINING
Information Patent Grant
Demulsification of oil-in-water emulsions
- Patent number 4,614,593
- Issue date Sep 30, 1986
- Ethyl Corporation
- David N. Roark
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

David N. Roark

Person

Patents Grantslast 30 patents

Sulfamate stabilization of a bromine biocide in water

Copolyimide aromatic sulfone-fluoroaliphatic resin composition

Process for polymerizing monoallylamine

High temperature adhesive for polymide films

Fluid loss control in well cement slurries

Fluid loss control in well cement slurries

Water clarification

Fluid loss control in well cement slurries

Demulsification of oil-in-water emulsions