Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D684412 | Media unit | — | 2013-06-18 |
| D682584 | Media unit | — | 2013-05-21 |
| D670511 | Media unit | — | 2012-11-13 |
| 5057209 | Depression of the flotation of silica or siliceous gangue in mineral flotation | Richard R. Klimpel, Donald E. Leonard, Basil S. Fee | 1991-10-15 |
| 4830740 | Pyrite depressants useful in the separation of pyrite from coal | Richard R. Klimpel | 1989-05-16 |
| 4826588 | Pyrite depressants useful in the separation of pyrite from coal | Richard R. Klimpel, Michael J. Fazio | 1989-05-02 |
| 4822483 | Collector compositions for the froth flotation of mineral values | Richard R. Klimpel | 1989-04-18 |
| 4820406 | Method for the froth flotation of coal | Richard R. Klimpel | 1989-04-11 |
| 4808301 | Flotation depressants | Richard R. Klimpel | 1989-02-28 |
| 4797202 | Froth flotation method | Richard R. Klimpel | 1989-01-10 |
| 4789392 | Froth flotation method | Richard R. Klimpel | 1988-12-06 |
| RE32778 | Frothers demonstrating enhanced recovery of coarse particles in froth floatation | Richard R. Klimpel, Roger W. Bergman | 1988-11-08 |
| 4770767 | Method for the froth flotation of coal | Richard R. Klimpel | 1988-09-13 |
| 4761223 | Frothers demonstrating enhanced recovery of fine particles of coal in froth flotation | Richard R. Klimpel | 1988-08-02 |
| 4735711 | Novel collectors for the selective froth flotation of mineral sulfides | Richard R. Klimpel, Edwin J. Strojny | 1988-04-05 |
| 4732668 | Novel collectors for the selective froth flotation of mineral sulfides | Richard R. Klimpel, Edwin J. Strojny | 1988-03-22 |
| 4702822 | Novel collector composition for froth flotation | Richard R. Klimpel | 1987-10-27 |
| 4684459 | Collector compositions for the froth flotation of mineral values | Richard R. Klimpel | 1987-08-04 |
| 4676890 | Collector compositions for the froth flotation of mineral values | Richard R. Klimpel | 1987-06-30 |
| 4582596 | Frothers demonstrating enhanced recovery of coarse particles in froth floatation | Roger W. Bergman, Richard R. Klimpel | 1986-04-15 |
| 4474619 | Conditioner for flotation of coal | Wilfred C. Meyer, Robert E. Hefner, Jr. | 1984-10-02 |
| 4213831 | Aluminum container for processing vinylbenzyl chlorides | Richard H. Hall, Daniel H. Haigh | 1980-07-22 |