Issued Patents All Time
Showing 1–25 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4816069 | Method for converting cobalt to cobalt metal powder | Alan D. Douglas, Clarence D. Vanderpool | 1989-03-28 |
| 4808384 | Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material | Clarence D. Vanderpool, Judith A. Ladd, Mary A. Fedorchak | 1989-02-28 |
| 4759915 | Process for extracting tungsten from alkali metal tungstate solutions | Tai K. Kim, Alan D. Douglas, Robert P. McClintic | 1988-07-26 |
| 4741886 | Process for recovering tungsten from tungsten bearing material containing arsenic | Clarence D. Vanderpool, Richard A. Scheithauer | 1988-05-03 |
| 4724128 | Method for purifying molybdenum | Michael J. Cheresnowsky, Edward Bok | 1988-02-09 |
| 4718995 | Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material | Clarence D. Vanderpool, Judith A. Ladd | 1988-01-12 |
| 4626425 | Recovery of tungsten from ammoniacal solutions | Richard A. Scheithauer, Clarence D. Vanderpool, Michael J. Miller | 1986-12-02 |
| 4626280 | Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material | Clarence D. Vanderpool, Judith A. Ladd | 1986-12-02 |
| 4624703 | Recovery of tungsten, scandium, iron, and manganese values from tungsten bearing material | Clarence D. Vanderpool, Judith A. Ladd | 1986-11-25 |
| 4624844 | Process for producing ammonium paratungstate | Richard A. Scheithauer, Clarence D. Vanderpool, Michael J. Miller | 1986-11-25 |
| 4612182 | Method of producing crystalline ammonium metatungstate | Tai K. Kim, Robert P. McClintic | 1986-09-16 |
| 4612183 | Method of producing crystalline ammonium metatungstate | Tai K. Kim, Carl Boyer, Donald H. Ennis | 1986-09-16 |
| 4608084 | Recovery of cobalt and chromium | Richard A. Scheithauer, Michael J. Miller, Clarence D. Vanderpool | 1986-08-26 |
| 4606885 | High purity cobalt article | Michael J. Miller | 1986-08-19 |
| 4604265 | Recovery of tungsten and rhenium | Alan D. Douglas, Kenneth T. Reilly, John E. Landmesser, Richard E. Landry | 1986-08-05 |
| 4599224 | Recovery of molybdenum from molybdenum disulfide | Clarence D. Vanderpool | 1986-07-08 |
| 4599222 | Recovery of tungsten and rhenium | Alan D. Douglas, Kenneth T. Reilly | 1986-07-08 |
| 4599223 | Separation of tungsten from rhenium | Alan D. Douglas, Kenneth T. Reilly, John Powers, III, James N. Christini | 1986-07-08 |
| 4454098 | Process for reclaiming tungsten from a hazardous waste | Richard A. Scheithauer, Clarence D. Vanderpool, Michael J. Miller | 1984-06-12 |
| 4448755 | Method for removal of tin from ammonium tungstates | Richard A. Scheithauer, Michael J. Miller, James N. Christini, Martin Vogt | 1984-05-15 |
| 4447404 | Recovery of molybdenum from molybdenum disulfide | Clarence D. Vanderpool | 1984-05-08 |
| 4409019 | Method for producing cobalt metal powder | Clarence D. Vanderpool | 1983-10-11 |
| 4381937 | Method for producing cobalt metal powder | Richard G. W. Gingerich, Clarence D. Vanderpool, Richard A. Scheithauer | 1983-05-03 |
| 4379126 | Process for recovering tungsten values from alkali solutions | Tai K. Kim, Joseph E. Ritsko, Martin Vogt | 1983-04-05 |
| 4374099 | Recovery of tungsten values from alkali tungstate solutions by solvent extraction | Tai K. Kim, Robert P. McClintic, Martin Vogt | 1983-02-15 |