Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5578235 | Overbased calcium sulfonate | Tze-Chi Jao, William J. Powers, III | 1996-11-26 |
| 5132033 | Method of preparing overbased calcium sulfonates | Tze-Chi Jao, Elzie D. Black | 1992-07-21 |
| 4997584 | Process for preparing improved overbased calcium sulfonate | Tze-Chi Jao, Leonard A. Matthews | 1991-03-05 |