Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4744893 | Polymeric sulfide mineral depressants | David W. Lipp, Samuel S. Wang, Donald P. Spitzer | 1988-05-17 |
| 4720339 | Flotation beneficiation process for non-sulfide minerals | D. R. Nagaraj, Alexander S. Lambert | 1988-01-19 |
| 4717550 | Process for purifying alumina | Donald P. Spitzer, David W. Lipp, Hans Peter Panzer | 1988-01-05 |
| 4410706 | Preparation of 2-vinylimidazoles by dehydrogenation of 2-ethylimidazoles and 2-ethylimidazolines | Hans Peter Panzer, Joseph Lawrence Schmitt, Jr., Roger J. Card | 1983-10-18 |
| 4299939 | Homopolymers and copolymers of 2-alkenylimidazole or its 1,3-dialkyl-2-alkenylimidazolium salts | Hans Peter Panzer, Paul F. Cutrufello | 1981-11-10 |
| 4267372 | Preparation of N-substituted acrylamide monomers having cationic substituents | Michael N. Desmond | 1981-05-12 |