Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5154757 | Method of making pure cobalt metal powder substantially free of divalent cationic impurities | Michael J. Miller, Thomas A. Wolfe, Michael J. Cheresnowsky | 1992-10-13 |
| 5021133 | Electrolytic method for producing ammonium paratungstate from cemented tungsten carbide | Clarence D. Vanderpool | 1991-06-04 |
| 5009788 | Method for removing organic and tungsten from sodium sulfate solution | Clarence D. Vanderpool | 1991-04-23 |
| 4966710 | Method for removing magnesium and calcium from sodium sulfate solutions | Robert P. McClintic | 1990-10-30 |
| 4759915 | Process for extracting tungsten from alkali metal tungstate solutions | Alan D. Douglas, Robert P. McClintic, Martin B. MacInnis | 1988-07-26 |
| 4751061 | Process for recovering scandium from waste material | Robert P. McClintic | 1988-06-14 |
| 4702895 | Purification of molybdenum | Michael J. Cheresnowsky, Timothy A. Brunelli | 1987-10-27 |
| 4626424 | Method of producing crystalline ammonium metatungstate | Robert P. McClintic | 1986-12-02 |
| 4612180 | Method of producing crystalline ammonium metatungstate | Robert P. McClintic, Clarence D. Vanderpool | 1986-09-16 |
| 4612182 | Method of producing crystalline ammonium metatungstate | Martin B. MacInnis, Robert P. McClintic | 1986-09-16 |
| 4612183 | Method of producing crystalline ammonium metatungstate | Carl Boyer, Martin B. MacInnis, Donald H. Ennis | 1986-09-16 |
| 4604266 | Process for purifying molybdenum trioxide | Michael J. Cheresnowsky, Timothy A. Brunelli, Robin W. Munn | 1986-08-05 |
| 4560539 | Removal of ammonia from sodium tungstate solutions | Robin W. Munn, Carl Boyer, Martin Vogt | 1985-12-24 |
| 4557924 | Method of producing crystalline ammonium metatungstate | Robert P. McClintic | 1985-12-10 |
| 4525331 | Process for purifying molybdenum trioxide | Michael J. Cheresnowsky, Timothy A. Brunelli, Robin W. Munn | 1985-06-25 |
| 4379126 | Process for recovering tungsten values from alkali solutions | Joseph E. Ritsko, Martin B. MacInnis, Martin Vogt | 1983-04-05 |
| 4374099 | Recovery of tungsten values from alkali tungstate solutions by solvent extraction | Martin B. MacInnis, Robert P. McClintic, Martin Vogt | 1983-02-15 |
| 4369165 | Recovery of tungsten values from alkali tungstate solutions by solvent extraction | Martin B. MacInnis, Martin Vogt, Robert P. McClintic | 1983-01-18 |
| 4360502 | Recovery of tungsten values from alkali tungstate solutions by solvent extraction | Martin B. MacInnis, Robert P. McClintic | 1982-11-23 |
| 4288413 | Separating molybdenum values from an aqueous solution containing tungsten by solvent extraction | Martin B. MacInnis | 1981-09-08 |
| 4288216 | Calciner with tapered reverse feed spiral | James N. Christini, Robert P. McClintic | 1981-09-08 |
| 4288217 | Rotary calciner feed spiral | James N. Christini, Robert P. McClintic | 1981-09-08 |
| 4278642 | Method for removing molybdenum from tungstate solutions by solvent extraction | Martin B. MacInnis | 1981-07-14 |
| 4261959 | Process for extracting ferric iron from an aqueous solution | Martin B. MacInnis | 1981-04-14 |
| 4255396 | Process for separating molybdenum values from tungsten values | — | 1981-03-10 |