Wolfgang J Wrasidlo: Asymmetric membranes. Brunswick Corporation, James S Waldron, December 16, 1986: US04629563 (290 worldwide citation)

Improved ultraporous and microporous membranes are provided with an entirely reticulated structure free of large finger voids. The reticulated support structure has gradually increasing pore size which reaches a maximum of from about 10 to about 20,000 times the diameter of the skin pores at the opp ...

John E Cadotte: Interfacially synthesized reverse osmosis membrane. FilmTec Corporation, Merchant Gould Smith Edell Welter & Schmidt, July 7, 1981: US04277344 (238 worldwide citation)

Good salt rejection and flux characteristics can be obtained with reverse osmosis membranes made from crosslinked, interfacially polymerized aromatic polyamides, particularly poly(arylenepolyamine aromaticpolycarboxylamides) such as poly(phenylenediamine trimesamide). The aromatic polyamides are pre ...

Harold K Lonsdale, Carl C Wamser: Functional, photochemically active, and chemically asymmetric membranes by interfacial polymerization of derivatized multifunctional prepolymers. Bend Research, Chernoff Vilhauer McClung & Stenzel, April 17, 1990: US04917800 (237 worldwide citation)

The preparation of a novel class of thin film membranes by interfacial polymerization is disclosed, said membranes incorporating as part of their polymeric structure the functionality of monomeric or oligomeric precursors. Specific embodiments include porphyrin and phthalocyanine derivatives that ar ...

Stephen R Ash: Dialysis instrument with dialysate side pump for moving body fluids. Ash Medical Systems, Woodard Weikart Emhardt & Naughton, April 28, 1987: US04661246 (176 worldwide citation)

A dialysis instrument having a pump located on the dialysate side of a dialyzer for moving body fluids. A disposable cartridge mounted to a main frame includes containers of calcium chloride, priming solution, water, sorbent column, dialysate reservoir bag and potassium/hydrogen citrate reinfusate r ...

Walton J Hammar: Antithrombogenic articles. Minnesota Mining and Manufacturing Company, Cruzan Alexander, Donald M Sell, Lorraine R Sherman, April 27, 1982: US04326532 (162 worldwide citation)

A medical article having a layered antithrombogenic surface is useful as a polymeric implant. The article comprises a polymeric substrate coated with chitosan to which is appended an antithrombotic agent. A process for rendering the surface of a polymer antithrombogenic is disclosed.

Frank R Shippey, Timothy C Vance, Fred E Martin: Automatic flushing system for membrane separation machines such as reverse osmosis machines. Raypak, Herzig & Walsh, November 16, 1976: US03992301 (156 worldwide citation)

An automatic flushing and cleaning system for membrane separation machines such as reverse osmosis machines having plural modules or membranes. Cleaning may be by way of reducing the pressure to allow the membrane to relax, by the injection of air or inert gas to provide turbulence, and/or by inject ...

Kazuo Ohkubo, Tadamasa Hayashi, Hiroshi Nagai: Hollow fiber filter device. Ebara Corporation, Wenderoth Lind & Ponack, October 24, 1989: US04876006 (138 worldwide citation)

A hollow fiber filter device has a filter casing which is partitioned by a horizontal member into a filtered liquid chamber and a filtering chamber and a plurality of filter modules are suspended downwardly from the horizontal member. Each of the modules includes a plurality of hollow fibers having ...

Donald W Schoendorfer, William F McLaughlin: Closed hemapheresis system and method. William F McLaughlin, Raymond A Bogucki, Gregory L Roth, Bradford R L Price, October 11, 1988: US04776964 (136 worldwide citation)

A hemapheresis system and method in accordance with the invention comprises a stationary closed housing concentric about a central axis and a feed system that moves blood upwardly from the housing lower end toward an outlet port adjacent a substantially closed upper end. Within the stationary housin ...

Gary B Heath, William G Palsulich, Keith J Manica, Jack C Swan Jr: Apparatus for use with fluid flow transfer device. Cobe Laboratories, May 19, 1987: US04666598 (135 worldwide citation)

A fluid flow chamber cassette that can be mounted with either its front wall or rear wall against a supporting machine and has a flexible tube that extends from a sidewall and forms a loop that is symmetrical about a loop axis that is transverse to the side wall so that the loop will be acted upon b ...

Wilfried Schal: Apparatus for the treatment of blood in particular for hemodialysis and hemofiltration. Fresenius, Townsend and Townsend, May 8, 1990: US04923598 (127 worldwide citation)

The apparatus for hemodialysis and hemofiltration comprises an extracorporeal blood circuit comprising a dialyzer and/or filter arrangement. For determining the fluid withdrawal per unit time and the total amount of fluid withdrawn flow sensors in conjunction with an evaluating unit are inserted int ...