Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6939443 | Anionic functional promoter and charge control agent | Michael Ryan, William Brevard, David L. Dauplaise, Michael Lostocco, Robert J. Proverb | 2005-09-06 |
| 4902764 | Polymeric sulfide mineral depressants | Alan S. Rothenberg, Samuel S. Wang, Donald P. Spitzer | 1990-02-20 |
| 4888106 | Method of using polymeric sulfide mineral depressants | D. R. Nagaraj | 1989-12-19 |
| 4866150 | Polymeric sulfide mineral depressants | D. R. Nagaraj | 1989-09-12 |
| 4744893 | Polymeric sulfide mineral depressants | Alan S. Rothenberg, Samuel S. Wang, Donald P. Spitzer | 1988-05-17 |
| 4717550 | Process for purifying alumina | Donald P. Spitzer, Alan S. Rothenberg, Hans Peter Panzer | 1988-01-05 |
| 4328141 | Stabilization of rosin dispersions with low molecular weight non-ionic polymers | John P. Farewell | 1982-05-04 |