|
| US4256472 | 4 Sep 1979 | 17 Mar 1981 | Lifetime Industries | Mist filter for extracting moisture from outlet air from auto air conditioner |
| US4264411 | 13 Sep 1979 | 28 Apr 1981 | Envirotech Corporation | Evaporator entrainment separator |
| US4410427 | 2 Nov 1981 | 18 Oct 1983 | Donaldson Company, Inc. | Fluid filtering device |
| US4589983 | 17 Oct 1983 | 20 May 1986 | Donaldson Company, Inc. | Fluid filtering device |
| US5066400 | 9 Oct 1990 | 19 Nov 1991 | Donaldson Company, Inc. | Self-spaced pleated filter |
| US5770061 | 12 Aug 1997 | 23 Jun 1998 | Suomen Sokeri Oy | Chromatographic separation column, inner structures thereof, and chromatographic separation |
| US5820646 | 26 Apr 1996 | 13 Oct 1998 | Donaldson Company, Inc. | Inline filter apparatus |
| US5895574 | 26 Apr 1996 | 20 Apr 1999 | Donaldson Company, Inc. | Rolled liquid filter using fluted media |
| US6000685 | 29 Jun 1998 | 14 Dec 1999 | Catalytic Distillation Technologies | Gas/liquid contact structure |
| US7291196 | 16 Nov 2006 | 6 Nov 2007 | | Filamentary pad for improved mist elimination and mass transfer |
| US7329326 | 21 Feb 2003 | 12 Feb 2008 | Donaldson Company, Inc. | Method of making a fluted filter media for air filter |
| US7488365 | 19 Nov 2002 | 10 Feb 2009 | Donaldson Company, Inc. | Filter element using corrugated media sheet |
| US7588619 | 28 Nov 2006 | 15 Sep 2009 | Wix Filtration Corp. | Cross-flow filter media and filter assembly |
| US7997425 | 31 Jan 2003 | 16 Aug 2011 | Donaldson Company, Inc. | Fluted filter medium and process for its manufacture |
| US8114194 | 30 Oct 2008 | 14 Feb 2012 | On Site Gas Systems, Inc. | Gas separation vessel with internal partition |