Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6409978 | Method of removing impurities from mineral concentrates | John M. Paustian | 2002-06-25 |
| 6221329 | Pyrolysis process for reclaiming desirable materials from vehicle tires | Robert J. Unterweger, Roy W. Hansen | 2001-04-24 |
| 6090353 | Method of removing impurities from mineral concentrates | John M. Paustian | 2000-07-18 |
| 4461674 | Apparatus for recovery of different weight fractions of oil from shale | Michael H. Weinecke | 1984-07-24 |
| 4412909 | Process for recovery of oil from shale | Michael H. Weinecke | 1983-11-01 |
| 4405438 | Process for recovery of different weight fractions of oil from shale | Michael H. Weinecke | 1983-09-20 |
| 4338079 | Method and apparatus for subjecting mineral particles to gas flow | George T. Lee, Peter L. Schumacher, Michael H. Weinecke | 1982-07-06 |
| 4270899 | Roller grate material bed transporting and heat exchange apparatus | George T. Lee, Peter L. Schumacher, Michael H. Weinecke | 1981-06-02 |
| 4269593 | Roller grate material bed conveying and heat exchange apparatus providing plural bed depths | Wayne D. Heyer, Michael H. Weinecke | 1981-05-26 |
| 4195986 | Selective reduction of nickel laterite ores | Jerry D. Schulz | 1980-04-01 |
| 4188287 | Slow speed wedge bar flotation mixing device | Donald Campbell Moore, III | 1980-02-12 |
| 4182498 | Recovery of round metal granules from process sludge | William M. Goldberger, Bhupendra K. Parekh | 1980-01-08 |