Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839074 | Specified C.sub.14 -carboxylate/vinyl ester polymer-containing compositions for lubricating oil flow improvement | Robert D. Tack, Kenneth Lewtas, Jose Alves | 1989-06-13 |
| 4826615 | Lubricating oil composition containing dual additive combination for low temperature viscosity improvement (PTF-004) | John P. Szykowski, Robert D. Tack | 1989-05-02 |
| 4810260 | Middle distillate compositions with improved cold flow properties | Robert D. Tack, Sarah L. Pearce | 1989-03-07 |