Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886582 | Resid hydroprocessing catalyst and method of preparation | — | 1989-12-12 |
| 4879265 | Hydroprocessing catalyst and phosphorous and citric acid containing impregnating solution | Pauline B. Borgens | 1989-11-07 |
| 4846961 | Hydroprocessing catalyst with a Ni-P-Mo | Paul R. Robinson | 1989-07-11 |
| 4818743 | Desulfurization catalyst and the catalyst prepared by a method | Ryden L. Richardson, Kenneth Baron | 1989-04-04 |
| 4816434 | Catalytic materials of controlled geometric mean electronegativity | — | 1989-03-28 |