Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845270 | Propanone 1,3-disulfonic acid as an esterification catalyst | — | 1989-07-04 |
| 4812596 | Process for the conversion of t-alkylphenol waste distillation bottoms to para-t-alkylphenol | Altaf Husain | 1989-03-14 |