Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4995732 | Method and apparatus for continuous measurement of the temperature of electroconductive melt and the thickness of refractory lining | Nikola A. Lingorski, Mincho B. Hadjiiski, Rumen B. Yovchev, Kamen B. Spassov | 1991-02-26 |
| 4703493 | Seal for an electrode hole in an electric arc furnace | Nikolay G. Bakalov, Penyo I. Penev, Ivan K. Ivanov, Velyo T. Velev, Alexander Y. Vulchev | 1987-10-27 |
| 4462878 | Method of treating and refining liquid metal alloys by direct current electric arc heating | Nikolay G. Bakalov, Alexander Y. Valchev, Boris Y. Drakaliiski, Vassil G. Peev, Stefan T. Bagarov +5 more | 1984-07-31 |
| 4246023 | Method and apparatus for the refining of iron-based melts | Vassil G. Peev, Alexander Y. Valchev, Nikola A. Lingorski | 1981-01-20 |
| 4200452 | Method for the refining of iron-based melts | Vassil G. Peev, Alexander Y. Valchev, Nikola A. Lingorski | 1980-04-29 |