Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880550 | Preparation of high base calcium sulfonates | — | 1989-11-14 |
| 4867891 | Overbased alkali metal sulfonates | — | 1989-09-19 |
| 4832857 | Process for the preparation of overbased molybdenum alkaline earth metal and alkali metal dispersions | John H. Udelhofen | 1989-05-23 |