|
| US3964886 | 29 Oct 1974 | 22 Jun 1976 | Baltimore Aircoil Company, Inc. | Gas scrubbing apparatus |
| US4997549 | 19 Sep 1989 | 5 Mar 1991 | Advanced Processing Technologies, Inc. | Air-sparged hydrocyclone separator |
| US5039400 | 27 Feb 1990 | 13 Ago 1991 | Outokumpu Oy | Flotation machine |
| US5096572 | 12 Mar 1990 | 17 Mar 1992 | Board of Control of Michigan Tech. University | Froth flotation |
| US5188726 | 3 May 1991 | 23 Feb 1993 | University of Newcastle Research Associates Ltd. | Method of operating a plurality of minerals separation flotation cells |
| US5234112 | 20 Mar 1991 | 10 Ago 1993 | Servicios Corporativos Frisco S.A. de C.V. | Flotation reactor with external bubble generator |
| US5249688 | 23 Sep 1991 | 5 Oct 1993 | Board of Control of Michigan Technological University | Froth flotation apparatus |
| US5266240 | 17 Sep 1992 | 30 Nov 1993 | Servicios Corporativos Frisco, S.A. de C.V. | Flotation reactor with external bubble generator |
| US5341938 | 13 May 1993 | 30 Ago 1994 | Servicios Corporativos Frisco, S.A. de C.V. | Method of separating materials in a flotation reactor |
| US5535893 | 10 Nov 1994 | 16 Jul 1996 | University of Newcastle Research Associates Ltd. | Method and apparatus for separation by flotation in a centrifugal field |
| US5544759 | 5 Abr 1995 | 13 Ago 1996 | | Procedure and apparatus for materials separation by pneumatic flotation |
| US5876558 | 17 Dic 1997 | 2 Mar 1999 | Institute of Paper Science and Technology, Inc. | Froth flotation deinking process for paper recycling |
| US6082549 | 16 Jul 1998 | 4 Jul 2000 | Voith Sulzer Papiertechnik Patent GmbH | Process and facility to remove solid matter from an aqueous fibrous material suspension |
| US6551516 | 27 Oct 2000 | 22 Abr 2003 | Schreiber Corporation, Inc. | Methods for removing grit and grease from water |
| US6676833 | 6 Mar 2003 | 13 Ene 2004 | Schreiber Corporation | Apparatus for removing grit and grease from water |
| US6793079 | 27 Nov 2002 | 21 Sep 2004 | University of Illinois | Method and apparatus for froth flotation |
| US7328806 | 1 Jul 2004 | 12 Feb 2008 | University of Illinois | Apparatus for froth cleaning |
