|
| US4008058 | 17 Mar 1976 | 15 Feb 1977 | | Apparatus for regenerating a drying agent in driers for gases or air under positive pressure |
| US4269611 | 16 May 1979 | 26 May 1981 | | Apparatus for drying or dehumidifying gases |
| US4371384 | 26 May 1981 | 1 Feb 1983 | Green & Kellogg, Inc. | Bed vessels for a compact oxygen concentrator |
| US4738692 | 26 May 1987 | 19 Apr 1988 | | Gas drying apparatus |
| US5213593 | 28 Sep 1992 | 25 May 1993 | Pall Corporation | Pressure swing sorption system and method |
| US8034164 | 26 Sep 2008 | 11 Oct 2011 | Lummus Technology Inc. | Methods and apparatus for improved control of PSA flow variations |