Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4305813 | Method of extractive purification of residues from crude oil refining and heavy ends thereof | Stanislaw Pobiegly, Roman Dulski, Lucjan Cichon, Hieronim Tworek, Jerzy Kowalik | 1981-12-15 |