Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5624653 | Method for producing sulphur trioxide | Georgy Grozev, Christo Sapundjiev, Dimitry Elenkov, Nikola Dobrev, Ivan D. Enchev | 1997-04-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5624653 | Method for producing sulphur trioxide | Georgy Grozev, Christo Sapundjiev, Dimitry Elenkov, Nikola Dobrev, Ivan D. Enchev | 1997-04-29 |