1
David B Pall: Process for preparing hydrophilic polyamide membrane filter media and product. Pall Corporation, July 20, 1982: US04340479 (247 worldwide citation)

A process is provided for preparing skinless hydrophilic alcohol-insoluble polyamide membranes by preparing a solution in a polyamide solvent of an alcohol-insoluble polyamide resin having a ratio CH.sub.2 :NHCO of methylene CH.sub.2 to amide NHCO groups within the range from about 5:1 to about 7:1 ...


2
David B Pall, Thomas C Gsell: Blood collection and processing system. Pall Corporation, Leydig Voit & Mayer, March 31, 1992: US05100564 (192 worldwide citation)

A system for collecting and processing donated blood comprises a first porous medium interposed between a blood collection bag and a satellite bag and a second porous medium interposed between the blood collection bag and another satellite bag. The porous media are leucocyte depletion media. The sys ...


3
David B Pall: Corrugated filter element with external spiral tape support. Pall Corporation, September 6, 1983: US04402830 (168 worldwide citation)

A corrugated cylindrical filter element is provided having an external spiral tape support, comprising a corrugated filter sheet material in the form of a cylinder having an end cap at each end of the cylinder sealingly bonded to the filter sheet material at that end, the corrugations of the filter ...


4
David B Pall: Device and method for depletion of the leukocyte content of blood and blood components. Pall Corporation, Leydig Voit & Mayer, May 15, 1990: US04925572 (158 worldwide citation)

Devices for the depletion of leukocytes in blood products, preferably comprising an upstream porous element including means for removal of gels, at least one intermediate porous element including means for removal of microaggregates, and a downstream element including means for removal of leukocytes ...


5
Thomas J Bormann, Vlado I Matkovich, Thomas C Gsell, David B Pall: Device and method for separating plasma from a biological fluid. Pall Corporation, Leydig Voit & Mayer, February 11, 1997: US05601727 (153 worldwide citation)

A device and method for processing a biological fluid comprises directing the biological fluid tangentially or parallel to the face of a separation medium in at least one serpentine fluid flow channel such that a plasma-rich fluid passes through the separation medium and a plasma-depleted fluid pass ...


6
David B Pall, Thomas C Gsell: Device and method for separating leucocytes from platelet concentrate. Pall Corporation, Leydig Voit & Mayer, November 14, 1989: US04880548 (126 worldwide citation)

A device for the depletion of the leucocyte content in a platelet concentrate, preferably comprising a modified porous, fibrous medium with a critical wetting surface tension of at least about 90 dynes/cm and a method for the depletion of the leucocyte content and platelet concentrate comprising pas ...


7
David B Pall, Thomas C Gsell, Brian T Muellers: Method for processing blood for human transfusion. Pall Corporation, Leydig Voit & Mayer, October 6, 1992: US05152905 (122 worldwide citation)

The invention discloses a method for treating blood comprising (a) centrifuging blood and (b) passing a supernatant layer of the centrifuged blood through a porous medium until red blood cells block the porous medium.


8
David B Pall, Thomas C Gsell, Vlado I Matkovich, Thomas Bormann: System and method for processing biological fluid. Pall Corporation, Leydig Voit & Mayer, June 8, 1993: US05217627 (119 worldwide citation)

A system for collecting and processing donated blood comprises a first porous medium interposed between a blood collection bag and a satellite bag and a second porous medium interposed between the blood collection bag and another satellite bag. The porous media are leucocyte depletion media. The sys ...


9
David B Pall, Abraham Krasnoff: Microporous filter system and process. Pall Corporation, Leydig Voit Osann Mayer and Holt, February 14, 1984: US04431545 (107 worldwide citation)

A microporous filter system comprises two types of hydrophilic, microporous filter media operating in series. The two filter media have opposite zeta potentials with the upstream or first filter medium preferably having the positive zeta potential and the downstream or second filter having the negat ...


10
David B Pall, Frank Model: Process for preparing liquophilic polyamide membrane filter media and product. Pall Corporation, July 20, 1982: US04340480 (92 worldwide citation)

A process is provided for preparing skinless liquophilic alcohol-insoluble polyamide membranes by preparing at a first temperature a solution in a polyamide solvent having a temperature coefficient of solubility within the range from about 0.01 to about 5 weight percent per degree Centigrade of an a ...



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