Issued Patents All Time
Showing 51–60 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5167848 | Grafted viscosity index improver | Mark J. Struglinski, John E. Johnston | 1992-12-01 |
| 5118433 | Multifunctional viscosity index improver derived from amido-amine and degraded ethylene copolymer exhibiting improved low temperature viscometric properties | Antonio Gutierrez, Mark J. Struglinski | 1992-06-02 |
| 5068047 | Visosity index improver | Mark J. Struglinski | 1991-11-26 |
| 5053151 | Multifunctional viscosity index improver derived from amido-amine exhibiting improved low temperature viscometric properties | Antonio Gutierrez, John E. Johnston, Mark J. Struglinski, Robert D. Lundberg | 1991-10-01 |
| 5035821 | End-capped multifunctional viscosity index improver | John E. Johnston | 1991-07-30 |
| 4803003 | Ethylene copolymer viscosity index improver dispersant additive useful in oil compositions | — | 1989-02-07 |
| 4749505 | Olefin polymer viscosity index improver additive useful in oil compositions | John E. Johnston | 1988-06-07 |
| 4735736 | Viscosity index improver-dispersant additive | — | 1988-04-05 |
| 4692268 | Method for controlling viscosity of organic liquids and compositions | Robert D. Lundberg, Robert R. Phillips, L. Sherwood Minckler | 1987-09-08 |
| 4659784 | Block copolymers of N,N-disubstituted acrylamides | Lu H. Tung | 1987-04-21 |