Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5466819 | Coupled benzotriazole and benzophenone UV absorbers | William E. Leistner | 1995-11-14 |
| 5373037 | Coupled benzotriazole and benzophenone UV absorbers | William E. Leistner | 1994-12-13 |
| 5362881 | Coupled benzotriazole and benzophenone UV absorbers | William E. Leistner | 1994-11-08 |
| 5360850 | Asymmetrical benzotriazolylphenols | William E. Leistner | 1994-11-01 |
| 5292890 | Asymmetrical benzotriazolylphenols | William E. Leistner | 1994-03-08 |
| 5262541 | Fluorenol catalyzed reduction of o-nitroazobenzenes and 2-aryl-2H-benzotriazole-N-oxides | William E. Leistner, Howard R. Leistner | 1993-11-16 |
| 5237071 | Process for preparing 2,2'-methylene-bis(6-(2H-benzotriazol-2-yl)-4-hydrocarbyl phenols) | William E. Leistner, Mahmut Levent | 1993-08-17 |
| 5166355 | Process for preparing substituted 2,2'-methylene-bis-[6-(2H-benzotriazol-2-yl)-4-hydrocarbyl-phenols] | William E. Leistner, Mahmut Levent | 1992-11-24 |