Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6492521 | Hindered amine light stabilizers based on multi-functional carbonyl compounds and methods of making same | Ram B. Gupta | 2002-12-10 |
| 6414155 | Oligomeric hindered amine light stabilizers based on multi-functional carbonyl compounds and methods of making same | Ram B. Gupta | 2002-07-02 |
| 6365652 | Trisaryl-1,3,5-triazine ultraviolet light absorbers | Ram B. Gupta, Dennis Jakiela, Gottfried Haacke | 2002-04-02 |
| 6344505 | Mono- and bis-benzotriazolyldihydroxybiaryl UV absorbers | Donald Valentine, Jr., John F. Stephen | 2002-02-05 |