Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828816 | Process for producing sulphur from calcium sulphate | Igor G. Kostylkov, Igor A. Zhukov, Vladimir V. Zhizhin, David N. Soschin | 1989-05-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828816 | Process for producing sulphur from calcium sulphate | Igor G. Kostylkov, Igor A. Zhukov, Vladimir V. Zhizhin, David N. Soschin | 1989-05-09 |