David A. Hadfield

Follow

Person

Houston, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Hydrocyclones for oil spill cleanup having a controlled split ratio
- Patent number 5,498,346
- Issue date Mar 12, 1996
- Conoco Specialty Products, Inc.
- David A. Hadfield
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydrocyclones for oil spill cleanup with oil slug monitor
- Patent number 5,366,641
- Issue date Nov 22, 1994
- Conoco Specialty Products, Inc.
- David A. Hadfield
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Separation system employing degassing separators and hydroglyclones
- Patent number 5,302,294
- Issue date Apr 12, 1994
- Conoco Specialty Products, Inc.
- Mark F. Schubert
- E21 - EARTH DRILLING MINING