Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883908 | Process for the preparation of aromatic isocyanates from dialkyl ureas using an organic sulfonic acid promoter | Haven S. Kesling, Jr., Frank J. Liotta, Jr. | 1989-11-28 |
| 4873364 | Process for the preparation of methylene diphenylene diisocyanates and polymethylene polyphenylene poly (diisocyanates) | Haven S. Kesling, Jr. | 1989-10-10 |
| 4871871 | Process for the preparation of aromatic mono- and polyisocyanates | Haven S. Kesling, Jr. | 1989-10-03 |