Issued Patents 1994
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5348673 | Multifunctional viscosity index improver derived from amido-amine and degraded ethylene copolymer exhibiting improved low temperature viscometric properties | David Yen-Lung Chung, Antonio Gutierrez | 1994-09-20 |
| 5312556 | Multifunctional viscosity index improver derived from polyamine containing one primary amine group and at least one tertiary amine group and degraded ethylene copolymer | David Yen-Lung Chung | 1994-05-17 |
| 5310490 | Viscosity modifer polymers | Gary Ver Strate, Lewis J. Fetters | 1994-05-10 |
| 5310814 | Viscosity modifier polybutadiene polymers | Gary W. Verstrate, Lewis J. Fetters | 1994-05-10 |
| 5290461 | Multifunctional viscosity index improver derived from amido-amine and degraded ethylene copolymer exhibiting improved low temperature viscometric properties (PT-768) | David Yen-Lung Chung, Antonio Gutierrez | 1994-03-01 |
| 5290868 | Multifunctional viscosity index improver derived from polyamine containing one primary amine group and at least one secondary amine group and degraded ethylene copolymer | David Yen-Lung Chung, Antonio Gutierrez | 1994-03-01 |