Issued Patents All Time
Showing 25 most recent of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6780219 | Method of spheridizing silicon metal powders | Raj Pal Singh, David L. Houck, Michael Robert Pierce, Scott A. Braymiller | 2004-08-24 |
| 5897962 | Method of making flowable tungsten/copper composite powder | David L. Houck, Muktesh Paliwal, Sanjay Sampath | 1999-04-27 |
| 5470549 | Method of making tungsten-copper composite oxides | Leonid P. Dorfman, Michael J. Scheithauer, David L. Houck | 1995-11-28 |
| 5468457 | Method of making tungsten-copper composite oxides | Leonid P. Dorfman, Michael J. Scheithauer, David L. Houck | 1995-11-21 |
| 5439638 | Method of making flowable tungsten/copper composite powder | David L. Houck, Muktesh Paliwal, Sanjay Sampath | 1995-08-08 |
| 5114471 | Hydrometallurgical process for producing finely divided spherical maraging steel powders | Walter A. Johnson, Joseph E. Ritsko | 1992-05-19 |
| 5102454 | Hydrometallurgical process for producing irregular shaped powders with readily oxidizable alloying elements | Walter A. Johnson, Joseph E. Ritsko | 1992-04-07 |
| 4961770 | Process for producing spherical glass particles | Walter A. Johnson, Lori S. Pruyne | 1990-10-09 |
| 4927456 | Hydrometallurgical process for producing finely divided iron based powders | Walter A. Johnson, Joseph E. Ritsko | 1990-05-22 |
| 4913731 | Process of making prealloyed tungsten alloy powders | Walter A. Johnson, Joseph E. Ritsko | 1990-04-03 |
| 4900587 | Method for producing aluminum oxide coated iron-aluminum alloy powder | Joseph E. Ritsko, Walter A. Johnson | 1990-02-13 |
| 4900590 | Method for producing aluminum oxide coated iron powder | Joseph E. Ritsko, Walter A. Johnson | 1990-02-13 |
| 4898749 | Method for producing aluminum oxide coated cobalt powder | Joseph E. Ritsko, Walter A. Johnson | 1990-02-06 |
| 4885028 | Process for producing prealloyed tungsten alloy powders | Walter A. Johnson, Jack E. Vanderpool, Howard H. Shaw | 1989-12-05 |
| 4880605 | Gas dispersion shroud for high temperature processing of powders | Philip E. Stermer, Lori S. Pruyne | 1989-11-14 |
| 4859237 | Hydrometallurgical process for producing spherical maraging steel powders with readily oxidizable alloying elements | Walter A. Johnson, Joseph E. Ritsko | 1989-08-22 |
| 4816067 | Process for producing fine spherical particles | Jack E. Vanderpool | 1989-03-28 |
| 4808217 | Process for producing fine spherical particles having a low oxygen content | Lori S. Pruyne | 1989-02-28 |
| 4802915 | Process for producing finely divided spherical metal powders containing an iron group metal and a readily oxidizable metal | Joseph E. Ritsko, Walter A. Johnson | 1989-02-07 |
| 4800064 | Process for producing tungsten heavy alloy sheet using hydrometallurgically produced tungsten heavy alloy | Preston B. Kemp, Jr., Walter A. Johnson | 1989-01-24 |
| 4793969 | Process for producing tungsten heavy alloy sheet using high temperature processing techniques | Walter A. Johnson, Preston B. Kemp, Jr. | 1988-12-27 |
| 4792351 | Hydrometallurgical process for producing irregular morphology powders | Walter A. Johnson, Joseph E. Ritsko | 1988-12-20 |
| 4787934 | Hydrometallurgical process for producing spherical maraging steel powders utilizing spherical powder and elemental oxidizable species | Walter A. Johnson, Joseph E. Ritsko | 1988-11-29 |
| 4781753 | Process for producing fine spherical particles from non-flowing powders | Lori S. Pruyne | 1988-11-01 |
| 4781741 | Process for producing spherical glass particles | Walter A. Johnson, Lori S. Pruyne | 1988-11-01 |