1
Franco Castino: Filteration method for cell produced antiviral substances. American National Red Cross, Holman & Stern, December 13, 1983: US04420398 (104 worldwide citation)

This invention affords a filtration method and apparatus for extracting cell produced antiviral substances (CPAS) from a production broth using cross-flow membrane filtration. The broth is perfused into a first filtration cell and caused to cross-flow across an ultrafiltration membrane in the cell, ...


2
Rex R Coppom: Method and apparatus for use in electronically enhanced air filtration. Coppom Technologies, Duft Graziano & Forest P C, January 14, 1997: US05593476 (86 worldwide citation)

A high efficiency air filtration method and apparatus utilizes a fibrous filter medium that is polarized by a high potential difference which exists between two electrodes. The electrodes include an insulated electrode and an uninsulated electrode. A corona precharger is positioned upstream of the e ...


3
Iosif Shmidt, Mario Badiali: Filtration method and apparatus. Membrex Incorporated, Bryan Cave McPheeters & McRoberts, December 13, 1988: US04790942 (67 worldwide citation)

An improved method and apparatus for filtration includes an outer stationary body, an inner rotating body defining a gap with the outer body for receiving a fluid sample, the surface of one of the bodies defining the gap being a filter. The rotation of the inner body creates Taylor vortices which co ...


4
Edward John Jordan: Filtration method and apparatus. Siemens Water Technologies, May 18, 2010: US07718065 (36 worldwide citation)

The invention relates to a membrane bioreactor process combined with an advanced biological sludge digestion process that provides significant improvements in sludge digestion by reducing the costs and resources required for disposing of digested sludge. The offline treatment vessel is used to solub ...


5
John C Meakin: Filtration method and apparatus. A W Breiner, September 18, 1979: US04167875 (33 worldwide citation)

Apparatus for treating samples comprising a sample holding element; a wash trough removably positioned over the sample holding element; transfer tubes or conduits in sample receiving contact with the sample holding element, extending through the wash trough to a transfer head positioned over a vacuu ...


6
Carl J Hering Jr: Filtration method and apparatus having a filtrate collection chamber within the filter bed. John H Faro, December 22, 1992: US05173194 (31 worldwide citation)

A filtration apparatus includes a vertical column of filter media contained in and defined by a liquid-impervious vessel. A filtrate collection chamber is fixedly and centrally located in the media column. The collection chamber has liquid impervious top and sidewalls and an open bottom, whereby liq ...


7
Hirs Gene: Method of and apparatus for filtering water. Hydromation Filter Company, Cullen Settle Sloman & Cantor, December 9, 1975: US3925202 (21 worldwide citation)

A filtration method and apparatus includes a dual layer filter medium for removing suspended particulate materials and immiscible hydrocarbons, such as tramp oil, from water. The filter layers are comprised of hydrophilic materials having a weak to negative affinity for oil to facilitate the removal ...


8
Adrian Parton: Filtration method and apparatus. Genera Technologies, Cushman Darby & Cushman IP Group of Pillsbury Madison & Sutro, November 25, 1997: US05690825 (19 worldwide citation)

An expansible, compressed foam is used a s a filter medium and captured particulates are released from the foam by expanding the foam to open its pores. Micro-organisms such as Cryptosporidium or Giardia cysts may be trapped and recovered at high eficiency in a small volume of wash liquid easing fur ...


9
Gene Hirs: Filter method. AMSTED Industries Incorporated, Edward J Brosius, Fred P Kostka, February 26, 1980: US04190533 (18 worldwide citation)

A filtration method and apparatus for removing contaminants from liquids, including a deep bed filter comprised of either a single media layer or of two or more vertically superimposed, substantially distinct, contiguous layers of filter material. In the plural layer deep bed filters the lower layer ...


10
Raymond C Clark: Filtration method and apparatus. Brunswick Corporation, John G Heimovics, David S Guttman, August 31, 1976: US03977847 (16 worldwide citation)

A particle laden gas stream is cleaned by passing it through an all metal fabric including a base with pile fibers connected to the base. The flowing gas forces the pile fibers to lie down upon each other to form a depth filter media adapted to entrap fine particles. This depth filter media is clean ...



Click the thumbnails below to visualize the patent trend.