Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6428763 | Process for the production of iron carbide from iron oxide using external sources of carbon monoxide | Frank M. Stephens, Jr., Frank A. Stephens, Robert F. Hogsett | 2002-08-06 |
| 5904783 | Method for reducing lead leaching in fixtures | Jerome P. Downey | 1999-05-18 |
| 5366897 | Method for controlling the conversion of iron-containing reactor feed into iron carbide | Frank A. Stephens, Frank M. Stephens, Jr. | 1994-11-22 |
| 5223021 | Iron as a co-additive in refining crude lead bullion | Michael H. Blenk, Russell Bertrum Diemer, Jr. | 1993-06-29 |
| 5183497 | Iron and a copper speiss as co-additives in refining crude lead bullion | Michael H. Blenk, Russell Bertrum Diemer, Jr. | 1993-02-02 |
| 5183496 | Copper speiss as a co-additive in refining crude lead bullion | Michael H. Blenk, Russell Bertrum Diemer, Jr. | 1993-02-02 |
| 5137566 | Process for preheating iron-containing reactor feed prior to being treated in a fluidized bed reactor | Frank M. Stephens, Jr., Frank A. Stephens | 1992-08-11 |
| 5118479 | Process for using fluidized bed reactor | Frank M. Stephens, Jr., Frank A. Stephens | 1992-06-02 |
| 5110353 | Process for the recovery and separation of arsenic from antimony | Taie Li, Thomas P. Clement | 1992-05-05 |
| 5108497 | Treatment of indium dusts | Nicholas B. Gomez, Charles E. T. White, Laurence G. Stevens | 1992-04-28 |
| 5073194 | Process for controlling the product quality in the conversion of reactor feed into iron carbide | Frank A. Stephens, Frank M. Stephens, Jr. | 1991-12-17 |
| 4808221 | Process for the recovery and separation of arsenic from antimony | Thomas P. Clement, Taie Li | 1989-02-28 |
| 4618480 | Recovery of alumina values from alunite ore | Wayne W. Hazen, David L. Thompson, James E. Reynolds, Nicholas J. Lombardo, Paul B. Queneau | 1986-10-21 |
| D255187 | Combined spice rack and splash guard for mobile homes | — | 1980-06-03 |