Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865885 | Food color stain blocking fiber agents | Michel A. Herlant, Alexander S. Kirjanov | 1989-09-12 |
| 4813970 | Method for improving the lightfasteness of nylon dyeings using copper sulfonates | Alexander S. Kirjanov | 1989-03-21 |