Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847045 | Process for producing tungsten heavy alloy sheet | Walter A. Johnson | 1989-07-11 |
| 4844355 | Apparatus for milling metal powder to produce high bulk density fine metal powders | Robert J. Holland | 1989-07-04 |
| 4836850 | Iron group based and chromium based fine spherical particles | Walter A. Johnson | 1989-06-06 |
| 4832907 | Process for producing tungsten heavy alloy sheet | Walter A. Johnson, James R. Spencer | 1989-05-23 |
| 4818567 | Coated metallic particles and process for producing same | Robert J. Holland | 1989-04-04 |
| 4800064 | Process for producing tungsten heavy alloy sheet using hydrometallurgically produced tungsten heavy alloy | Walter A. Johnson, Nelson E. Kopatz | 1989-01-24 |
| 4793969 | Process for producing tungsten heavy alloy sheet using high temperature processing techniques | Walter A. Johnson, Nelson E. Kopatz | 1988-12-27 |
| 4787561 | Fine granular metallic powder particles and process for producing same | Robert J. Holland | 1988-11-29 |
| 4783214 | Low oxygen content fine shperical particles and process for producing same by fluid energy milling and high temperature processing | Walter A. Johnson | 1988-11-08 |
| 4783218 | Process for producing spherical refractory metal based powder particles | Walter A. Johnson | 1988-11-08 |
| 4783216 | Process for producing spherical titanium based powder particles | Walter A. Johnson | 1988-11-08 |
| 4783215 | Low oxygen content iron group based and chromium based fine spherical particles and process for producing same by fluid energy milling and temperature processing | Walter A. Johnson | 1988-11-08 |
| 4780131 | Process for producing spherical light metal based powder particles | Walter A. Johnson | 1988-10-25 |
| 4778515 | Process for producing iron group based and chromium based fine spherical particles | Walter A. Johnson | 1988-10-18 |
| 4777015 | Process for producing tungsten heavy alloy sheet using a metallic salt binder system | Walter A. Johnson, James R. Spencer | 1988-10-11 |
| 4765952 | Process for producing tungsten heavy alloy sheet by a loose fill hydrometallurgical process | — | 1988-08-23 |
| 4765951 | Process for producing tungsten heavy alloy sheet by direct hydrometallurgical process | — | 1988-08-23 |
| 4763423 | Method for drying fine metal powders | — | 1988-08-16 |
| 4756746 | Process of producing fine spherical particles | Walter A. Johnson | 1988-07-12 |
| 4711660 | Spherical precious metal based powder particles and process for producing same | Walter A. Johnson | 1987-12-08 |
| 4711661 | Spherical copper based powder particles and process for producing same | Walter A. Johnson | 1987-12-08 |
| 4705560 | Process for producing metallic powders | Walter A. Johnson, James Q. Steigelman | 1987-11-10 |