Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879053 | Process for preparing overbased calcium sulfonates | Leonard A. Matthews, Henry M. Przybyla, Joanne R. Whittle, Jerry C. Perciful | 1989-11-07 |
| 4810396 | Process for preparing overbased calcium sulfonates | Tze-Chi Jao | 1989-03-07 |