Issued Patents 1989
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886890 | Diquarternary nitrogen compounds | David J. Tracy, Robert B. Login | 1989-12-12 |
| 4883655 | Quaternized nitrogen containing polycyclic compounds | Robert B. Login, David J. Tracy, Michael W. Helioff | 1989-11-28 |
| 4848377 | Article for permanent structure alteration of hair | Carmen D. Bires, Michael W. Helioff | 1989-07-18 |
| 4837013 | Quaternized nitrogen containing compounds | Robert B. Login, David J. Tracy, Michael W. Helioff | 1989-06-06 |
| 4834970 | Cosometic compositions containing quaternized nitrogen containing compound | Robert B. Login, David J. Tracy, Michael W. Helioff | 1989-05-30 |
| 4830850 | Quaternized nitrogen containing compounds | Robert B. Login, David J. Tracy, Michael W. Helioff | 1989-05-16 |
| 4808569 | Fragrance additive | Michael W. Helioff, Robert B. Login | 1989-02-28 |