Issued Patents 1989
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886890 | Diquarternary nitrogen compounds | Ratan K. Chaudhuri, Robert B. Login | 1989-12-12 |
| 4885371 | Process for the preparation of purified N-alkyl lactams | Mohamed M. Hashem | 1989-12-05 |
| 4885158 | Heat stable quaternized lactams having oxylated sulfur anions | Thomas Rizzo, Robert B. Login | 1989-12-05 |
| 4883655 | Quaternized nitrogen containing polycyclic compounds | Robert B. Login, Ratan K. Chaudhuri, Michael W. Helioff | 1989-11-28 |
| 4842858 | Polymeric halophors | Mohamed M. Hashem, Robert B. Login | 1989-06-27 |
| 4837013 | Quaternized nitrogen containing compounds | Robert B. Login, Ratan K. Chaudhuri, Michael W. Helioff | 1989-06-06 |
| 4834970 | Cosometic compositions containing quaternized nitrogen containing compound | Robert B. Login, Ratan K. Chaudhuri, Michael W. Helioff | 1989-05-30 |
| 4830851 | Polymeric halophors | Mohamed M. Hashem, Robert B. Login | 1989-05-16 |
| 4830850 | Quaternized nitrogen containing compounds | Robert B. Login, Ratan K. Chaudhuri, Michael W. Helioff | 1989-05-16 |
| 4806609 | Pyrrolidonyl acrylate block polymers | Mohamed M. Hashem, Fulvio J. Vara | 1989-02-21 |
| 4801400 | Epoxy pyrrolidone based non-ionic surfactants | Robert B. Login, Mohamed M. Hashem | 1989-01-31 |