Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5223021 | Iron as a co-additive in refining crude lead bullion | Russell Bertrum Diemer, Jr., John P. Hager | 1993-06-29 |
| 5183496 | Copper speiss as a co-additive in refining crude lead bullion | Russell Bertrum Diemer, Jr., John P. Hager | 1993-02-02 |
| 5183497 | Iron and a copper speiss as co-additives in refining crude lead bullion | Russell Bertrum Diemer, Jr., John P. Hager | 1993-02-02 |
| 5100466 | Process for purifying lead using calcium/sodium filter cake | — | 1992-03-31 |