Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5228902 | Method of desulfurization in vacuum processing of steel | Brad Hjerpe, Roger Marquart, James D. Reisinger | 1993-07-20 | $16,160,000 |
| 5106412 | Method for providing steel with lowered hydrogen level after ladle treatment | Keith E. Sessions, William J. Stolnacker, deceased | 1992-04-21 | $21,404,000 |