1
Donald H White Jr, Marcel G Verrando, Charles R Picek: Heatless adsorbent fractionators with microprocessor cycle control and process. Pall Corporation, April 8, 1980: US04197095 (85 worldwide citation)

A method and apparatus are provided for adsorbing one or more first gases from a mixture thereof with a second gas to reduce the concentration of first gas in the mixture to below a permissible maximum concentration. The flow rate, inlet and outlet temperatures, inlet and outlet pressures and regene ...


2
Marcel G Verrando, Donald H White, Evan E Koslow, Phillip G Barkley: Pressure-swing adsorption system and method for NBC collective protection. Pall Corporation, Leydig Voit & Mayer, January 8, 1991: US04983190 (56 worldwide citation)

A pressure-swing adsorber using type 13X (10 Angstrom) molecular sieve is used in lieu of or ahead of an activated or impregnated carbon filter in an NBC collective protection system. The pressure-swing adsorber removes a much wider range of toxic vapors from air than an impregnated carbon bed, is f ...


3
Marcel G Verrando, Donald H White Jr: Heat-reactivatable adsorbent gas fractionator and process. Pall Corporation, January 26, 1982: US04312641 (52 worldwide citation)

A process and appartus are provided for removing a first gas from a mixture thereof with a second gas. The gas mixture is passed through a sorbent bed having a preferential affinity for the first gas and comprising a microwave absorbent capable of absorbing microwave energy and the first gas is sorb ...


4
Marcel G Verrando: Heat-reactivatable adsorbent gas fractionator and process. Pall Corporation, January 26, 1982: US04312640 (42 worldwide citation)

A process and apparatus are provided for removing a first polar gas from a mixture thereof with a second gas. The gas mixture is passed through a sorbent bed having a preferential affinity for the first polar gas and the first polar gas is sorbed thereon so as to produce a gaseous effluent which has ...


5
John D Miller, Marcel G Verrando: Sorbing apparatus. Pall Corporation, Leydig Voit & Mayer, August 18, 1987: US04687573 (33 worldwide citation)

The disclosure describes a sorbing apparatus including at least one chamber having first and second ports and defining a fluid flow path between the first and second ports. The chamber includes a bed of sorbent particles which are bound to one another by a polymeric binding agent that prevents movem ...


6
Harry D Cordes, Thomas G Haberer, Marcel G Verrando III: Valves for desiccant dryers. Pall Corporation, Leydig Voit Osann Mayer & Holt, June 25, 1985: US04525183 (24 worldwide citation)

A series of valves are disclosed which are specially designed for use in desiccant dryers. Each of the valves utilizes a housing (12), fabricated of standard pipe components and communicating flanges (13, 14) in conjunction with a poppet (24) and seat (20) arrangement. A support (30) fixed to one si ...


7
Marcel G Verrando, Michael B Duich, Bradley T Overton: Heaterless dryer having variable cycle. Pall Corporation, Leydig Voit & Mayer, August 12, 1986: US04605425 (17 worldwide citation)

A method and apparatus for fractionating a mixture of gasses, by using a bed of sorbent which is conditionally depressurized and purged after adsorption intervals of a predetermined time duration, varies the time duration in response to demand as indicated by the decisions of whether purging is requ ...


8
Donald H White Jr, Marcel G Verrando: Sorbing apparatus. Pall Corporation, Leydig Voit & Mayer, May 16, 1989: US04830641 (14 worldwide citation)

The disclosure describes a sorbing apparatus comprising at least one chamber having first and second ports and defining a fluid flow path between the first and second ports. The chamber includes a bed of sorbent particles which are disposed in the fluid flow path and the sorbent bed includes particl ...


9
Micheal B Duich, Bradley T Overton, Marcel G Verrando III: Fault recovery procedure for heat-reactivated dryer. Pall Corporation, Leydig Voit & Mayer, January 5, 1988: US04718020 (13 worldwide citation)

A method of operating a microcomputer for controlling a heat-reactivated dual-chamber gas adsorber ensures safe and reliable operation of the adsorber by recovering from disruption of the microcomputer execution sequence and sensing failure of the power control components which enable regeneration o ...


10
Marcel G Verrando III: Capacitance probe for use in absorbent systems. Pall Corporation, Leydig Voit & Mayer, November 21, 1989: US04882648 (2 worldwide citation)

A capacitance probe having a relative thin profile and large cross section for use in short yet relatively large diameter desiccant beds is formed from two substantially identical members, each having a network of strip elements electrically and structurally connecting a plurality of plate elements. ...