Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6849297 | Encapsulated long life electroluminescent phosphor | Chen-Wen Fan, Richard G. W. Gingerich, Dale E. Benjamin | 2005-02-01 |
| 5900188 | Yttrium tantalate x-ray phosphors with reduced persistence | Gregory A. Marking, Vaddi B. Reddy | 1999-05-04 |
| 5711898 | Improved blue-green emitting ZnS:Cu,Cl electroluminescent phosphor and method of making same | Vaddi B. Reddy | 1998-01-27 |
| 5702643 | ZnS:Cu electroluminescent phosphor and method of making same | Vaddi B. Reddy | 1997-12-30 |
| 5643496 | Small size electroluminescent phosphor | Nathaniel E. Brese | 1997-07-01 |
| 5503769 | Method of making an unactivated yttrium tantalate x-ray phosphor | Richard G. W. Gingerich, Richard R. Borchardt | 1996-04-02 |
| 5244750 | Coated electroluminescent phosphor | Andrew G. Sigai | 1993-09-14 |
| 5110499 | Method for increasing the brightness and halflife of electroluminescent phosphors | — | 1992-05-05 |
| 5009808 | Process for producing electroluminescent yellow zinc sulfide phosphors | Richard G. W. Gingerich, Christopher Poss | 1991-04-23 |
| 4889703 | Process for producing tungstosilicic acid | Alan D. Douglas, Henry E. Hoffman | 1989-12-26 |
| 4859361 | Process for producing electroluminescent phosphors of improved brightness | Richard G. W. Gingerich | 1989-08-22 |
| 4803062 | Method for producing tungsten hexachloride | Robin W. Munn, Robert P. McClintic | 1989-02-07 |
| 4604265 | Recovery of tungsten and rhenium | Alan D. Douglas, John E. Landmesser, Richard E. Landry, Martin B. MacInnis | 1986-08-05 |
| 4604277 | Production of ammonium tetrathiotungstate | Robin W. Munn, Henry E. Hoffman | 1986-08-05 |
| 4604278 | Production of ammonium tetrathiomolybdate | Robin W. Munn, Henry E. Hoffman, Alan D. Douglas | 1986-08-05 |
| 4603043 | Controllable nitrate fusion | Alan D. Douglas, John E. Landmesser | 1986-07-29 |
| 4599223 | Separation of tungsten from rhenium | Alan D. Douglas, Martin B. MacInnis, John Powers, III, James N. Christini | 1986-07-08 |
| 4599222 | Recovery of tungsten and rhenium | Alan D. Douglas, Martin B. MacInnis | 1986-07-08 |
| 4584185 | Recovery of tungsten and rhenium | Alan D. Douglas | 1986-04-22 |
| 4557906 | Recovery of rhenium | Alan D. Douglas, John E. Landmesser | 1985-12-10 |
| 4521381 | Recovery of rhenium | Alan D. Douglas | 1985-06-04 |
| 4406866 | Recovery of refractory metal values from scrap cemented carbide | — | 1983-09-27 |