| 7842107 |
Method and apparatus for thermally upgrading carbonaceous materials |
Philippus J. Meyer, Michael F. Ray, Michael Schlegel, Sheldon Schultz |
2010-11-30 |
| 7198655 |
Method and apparatus for thermally upgrading carbonaceous materials |
Philippus J. Meyer, Michael F. Ray, Michael Schlegel, Sheldon Schultz |
2007-04-03 |
| 6428763 |
Process for the production of iron carbide from iron oxide using external sources of carbon monoxide |
Frank M. Stephens, Jr., Frank A. Stephens, John P. Hager |
2002-08-06 |
| 5733357 |
Process for converting iron oxide to iron carbide employing internally generated carbon oxide as the carbiding agent |
Frank M. Stephens, Jr., Frank A. Stephens |
1998-03-31 |
| 4610722 |
Process for metal recovery from steel plant dust |
Willem P. C. Duyvesteyn |
1986-09-09 |
| 4552629 |
Electrogalvanizing utilizing primary and secondary zinc sources |
Willem P. C. Duyvesteyn |
1985-11-12 |
| 4551314 |
Process for improving solvent extraction operation using two mixers |
Leo W. Beckstead, Linn D. Havelick |
1985-11-05 |
| 4504448 |
Activated carbon adsorption of flotation reagents from tungsten solutions |
Dennis E. Voelker, Leo W. Beckstead |
1985-03-12 |
| 4490339 |
Process for recovering tungsten from MoS.sub.3 /WS.sub.3 precipitates |
Leo W. Beckstead, Dennis E. Voelker |
1984-12-25 |
| 4443415 |
Recovery of V.sub.2 O.sub.5 and nickel values from petroleum coke |
Paul B. Queneau, Leo W. Beckstead, Dale K. Huggins |
1984-04-17 |
| 4342728 |
Process for digesting tungsten ores containing organic matter |
Paul B. Queneau, Leo W. Beckstead |
1982-08-03 |
| 4338287 |
Process for conditioning tungsten concentrates |
Dale K. Huggins, Leo W. Beckstead |
1982-07-06 |
| 4303623 |
Separation of trace molybdenum from tungstate solutions |
Dale K. Huggins, Paul B. Queneau, Robert C. Ziegler, Leo W. Beckstead |
1981-12-01 |