Issued Patents All Time
Showing 25 most recent of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9625448 | Double caged GABA compounds, bis-CNB-GABA | Diana Shi, Martin F. Semmelhack | 2017-04-18 |
| 5959054 | Polymeric sulfide mineral depressants | Devarayasamudram Ramachandran Nagaraj | 1999-09-28 |
| 5837211 | Compositions and method for foam control in Bayer process | Dennis G. Downing, Peter V. Avotins | 1998-11-17 |
| 5756622 | Polymeric sulfide mineral depressants | D. R. Nagaraj | 1998-05-26 |
| 5533626 | Method of depressing non-sulfide silicate gangue minerals | D. R. Nagaraj, James S. W. Lee, Lino G. Magliocco | 1996-07-09 |
| 5531330 | Method of depressing non-sulfide silicate gangue minerals | D. R. Nagaraj | 1996-07-02 |
| 5525212 | Method of depressing non-sulfide silicate gangue minerals | D. R. Nagari, James S. W. Lee, Lino G. Magliocco | 1996-06-11 |
| 5507395 | Method of depressing non-sulfide silicate gangue minerals | D. R. Nagarai | 1996-04-16 |
| 5261539 | Flotation process for purifying calcite | Bill A. Hancock | 1993-11-16 |
| 5237079 | Collectors and processes for making and using same | D. R. Nagaraj | 1993-08-17 |
| 5019246 | Frothing procedure using polymeric sulfide mineral depressants | D. R. Nagaraj | 1991-05-28 |
| 4966938 | Allyl thiourea polymer with surface-modifying agent | D. R. Nagaraj | 1990-10-30 |
| 4929343 | Novel collectors and processes for making and using same | D. R. Nagarai | 1990-05-29 |
| 4902765 | Allyl thiourea polymers | D. R. Nagaraj | 1990-02-20 |
| 4902764 | Polymeric sulfide mineral depressants | Alan S. Rothenberg, David W. Lipp, Donald P. Spitzer | 1990-02-20 |
| 4871466 | Novel collectors and processes for making and using same | D. R. Nagaraj | 1989-10-03 |
| RE32827 | Neutral hydrocarboxycarbonyl thionocarbamate sulfide collectors | Yun Fu | 1989-01-10 |
| RE32786 | Neutral hydrocarboxycarbonyl thiourea sulfide collectors | Yun Fu | 1988-11-22 |
| 4744893 | Polymeric sulfide mineral depressants | Alan S. Rothenberg, David W. Lipp, Donald P. Spitzer | 1988-05-17 |
| 4661278 | Monothiophosphinates as acid, neutral, or mildly alkaline circuit sulfide collectors and process for using same | D. R. Nagaraj | 1987-04-28 |
| 4657688 | Neutral hydrocarboxycarbonyl thionocarbamate sulfide collectors | Yun Fu | 1987-04-14 |
| 4587013 | Monothiophosphinates as acid, neutral, or mildly alkaline circuit sulfide collectors and process for using same | D. R. Nagaraj | 1986-05-06 |
| 4584097 | Neutral hydrocarboxycarbonyl thionocarbamate sulfide collectors | Yun Fu | 1986-04-22 |
| 4556483 | Neutral hydrocarboxycarbonyl thiourea sulfide collectors | Yun Fu | 1985-12-03 |
| 4532031 | Froth flotation process | Michael J. Scanlon | 1985-07-30 |