Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5132033 | Method of preparing overbased calcium sulfonates | Tze-Chi Jao, Jayne M. Vaccaro | 1992-07-21 |
| 5108630 | Process for overbasing sulfonates comprising two separate additions of calcium oxide | Leonard A. Matthews, William J. Powers, III, Robert Erickson | 1992-04-28 |
| 4973411 | Process for the preparation of sulfurized overbased phenate detergents | Tze-Chi Jao, Carl K. Esche, Jr., Robert H. Jenkins, Jr. | 1990-11-27 |