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| Number | Title | Issue Date |
| 7422686 | Cellulose hydrate ultrafiltration membranes and method for their production There is disclosed a process for the production of cellulose hydrate ultrafiltration membranes having improved filtration performance and the ultrafiltration membranes produced by the process. ... | 09/09/2008 |
| 7381330 | Cellulose-based microporous membrane There is disclosed a cellulosic microporous filtration membrane with upper and lower porous protective layers with a porous sponge-type intermediate layer between the two protective layers, wherein the sponge-type structure consists of two isotropic regions having d... | 06/03/2008 |
| 7252646 | Universal connecting device that designates an operational mode A controller for a gradient sequential compression system is provided for inflating a plurality of inflatable chambers of one or more compression sleeves according to several different modes of operation. A mode of operation may define the number and selection of ch... | 08/07/2007 |
| 7160464 | Methods for removal, purification, and concentration of viruses and methods of therapy based thereupon The invention is based on the discovery that certain membranes, which include side chains or molecular “brushes” having, for example, tertiary amino functional groups, can be used as highly effective filters to capture viruses/virus particles from liquids withou... | 01/09/2007 |
| 7153426 | Charged filtration membranes and uses therefor The invention relates to charged filtration membranes and their use for separation of a protein from solvent, low molecular weight solutes or a mixture of proteins. Modification of the membranes to generate charge includes modification of membrane pores to alter cha... | 12/26/2006 |
| 7049366 | Acrylic acid composition and its production process, and process for producing water-absorbent resin using this acrylic acid composition, and water-absorbent resin In order to produce inexpensively with high productivity a water-absorbent resin of which: the residual monomer content and the water-extractable content are both low, and the properties are high, and the colorability is low; there is provided a process for producin... | 05/23/2006 |
| 7009010 | Water-absorbent resin and production process therefor To provide: a process in which a coarse gel itself is made not to form in the case of applying the aqueous solution polymerization; and a process in which the polymerization is mildly controlled and the production is stably carried out in the case of applying the re... | 03/07/2006 |
| 6979480 | Porous inkjet receptor media Improved macroporous ink receptor media are disclosed. An inkjet receptive media in accordance with one embodiment of the present invention comprises a web comprising a plurality of fibers and a coating overlaying at least a portion of a plurality of the fibers. In ... | 12/27/2005 |
| 6905742 | Polypropylene card construction An image retaining card is disclosed. An image retaining card in accordance with the present invention may be utilized as an identification card, a driver's license, a passport, and the like. An image retaining card in accordance with the present invention comprises... | 06/14/2005 |
| 6899834 | Composite membranes and methods for making such membranes Membranes and methods for making membranes are disclosed. The membranes include a polymeric matrix and a particulate material immobilized within the matrix. The membranes may find particular application in methods and apparatus for removing organic compounds from a ... | 05/31/2005 |
| 6632366 | Cellulose compound hollow fiber membrane The present invention relates to a cellulose compound hollow fiber membrane having high mechanical strength and is hardly degraded by microorganisms, wherein a cellulose compound is comprised as a membrane material, the thickness of the membrane is 50 to ... | 10/14/2003 |
| 6558546 | pH dependent membrane diffusion A pore plugging material, for pH dependent membrane diffusion, in which cyclic olefins having phosphazene-functional moieties provide predictable erosion properties when used to plug pores in separation barriers and other porous membranes. Specific proper... | 05/06/2003 |
| 6498007 | Methods of treatment of disease using adsorbent carriers The invention relates to a method for the removal of leucocytes from blood which comprises bringing blood that comprises infected leucocytes into contact with an adsorbent carrier that has a greater affinity for infected, activated and/or defective leucoc... | 12/24/2002 |
| 6372136 | Cellulose acetate semipermeable membrane and process for producing the cellulose acetate semipermeable membrane To provide a cellulose acetate semipermeable membrane having a high filtration rate and high mechanical strength and which is hardly degraded by microorganisms, the present invention provides a cellulose acetate semipermeable membrane containing a cellulo... | 04/16/2002 |
| 6358754 | (Bio)chemical reagent solid phases, process for their production and their applications Novel solid phase reaction supports are disclosed. The solid phase reaction supports include (a) a solid phase carrier having a multiplicity of NH2 functional groups; (b) a coupling compound covalently bonded to an NH2 group of the solid ... | 03/19/2002 |
| 6350621 | (Bio)chemical reagent solid phases, process for their production and their applications Novel solid phase reaction supports are disclosed. The solid phase reaction supports include (a) a solid phase carrier having a multiplicity of NH2 functional groups of the Formula (I): ##STR1## in which R1 and R2 are each... | 02/26/2002 |
| 6344239 | Method for producing a tobacco filter material A method for producing a tobacco filter material which is either (A) a coating process for coating the surface of a fibrous or particulate cellulose with a cellulose ester having an average substitution degree of about 2.0 to about 2.6 to give a coated ce... | 02/05/2002 |
| 6293411 | Integral supported separation membranes Supported separation membranes are disclosed wherein the permselective membrane is integral with a polymeric support of non-woven fibers having a particular air permeability, the integral membranes exhibiting far superior lifetimes and retention capabilit... | 09/25/2001 |
| 6139742 | Membrane-based sorbent for heavy metal sequestration A process is provided for making membrane-based sorbents with enhanced binding activity that are particularly useful for heavy metal sequestration. The process includes the step of selectively hydrolyzing a polyacetylated membrane in order to deacetylated... | 10/31/2000 |
| 6103121 | Membrane-based sorbent for heavy metal sequestration A process is provided for making membrane-based sorbents with enhanced binding activity that are particularly useful for heavy metal sequestration. The process includes the step of selectively hydrolyzing a polyacetylated membrane in order to deacetylate ... | 08/15/2000 |
| 6099734 | Apparatus, membranes and methods for removing organic compounds from a biological fluid Membranes and methods for making membranes are disclosed. The membranes include a polymeric matrix and a particulate material immobilized within the matrix. The membranes may find particular application in methods and apparatus for removing organic compou... | 08/08/2000 |
| 5871680 | Method and apparatus for spinning hollow fiber membranes A process for the preparation of anisotropic hollow fibers useful as permselective separation membranes and for producing composite membranes thereof, involves extruding a spinning dope through a spinneret that extends into a coagulation chamber maintaine... | 02/16/1999 |
| 5856006 | Tobacco filter material and a method for producing the same A tobacco filter material containing fibers which have a core and a surface layer which surrounds the core, wherein the core comprises a non-esterified cellulose and the surface layer comprises a cellulose ester. The fiber may be (A) a cellulose fiber coa... | 01/05/1999 |
| 5853647 | Process for the stabilization of the properties of cellulosic membranes Properties of cellulosic membranes such as the length and the ultrafiltration rate are stabilized by warmth/humidity conditioning, whereby temperatures in a range of about 30° to 60° C. and relative humidities in a range of about 10 to 60% are suitable.... | 12/29/1998 |
| 5849189 | Hollow fiber blood purifying membrane and process for its production A hollow fiber blood purifying membrane which is a hollow fiber membrane substantially composed of cellulose acetate, has a substantially non-oriented distribution of cellulose acetate polymer particles on the inner surface of the hollow fibers, has a den... | 12/15/1998 |
| 5840190 | Surface modified biocompatible membranes A surface modified biocompatible membranes used in contact with body fluids or tissue and method of preparing the membrane with functional groups incorporated into the membrane material to covalent bond compounds that infer biocompactibility to the surfac... | 11/24/1998 |
| 5783124 | Cellulose acetate hemodialysis membrane A cellulose acetate membrane composed of a mixture comprising a cellulose triacetate and a cellulose diacetate and having an improved heat stability, which does not substantially show a melting peak of cellulose diacetate but substantially shows a melting... | 07/21/1998 |
| 5736046 | High-flux hollow-fiber membrane with enhanced transport capability and process for making same Semipermeable membranes are disclosed for purifying aqueous biological fluids. The membranes are particularly suitable for purifying extracorporeal blood via hemodialysis. The membranes, preferably configured as hollow fibers, are made from a hydrophilic ... | 04/07/1998 |
| 5711881 | Hematopoietic inhibiting factor containing compositions The present invention relates to hematopoietic inhibiting factor-containing compositions which inhibit colony formation of CFU-E, comprising a substance obtained in the fraction eluting at exclusion limit by gel filtration using a gel having maximum molec... | 01/27/1998 |
| 5695717 | Gas exchange apparatus A gas exchange device (100) with an extracorporeal blood circuit (102) in which a blood pump (110) is connected, with a CO2 exchange unit (112), and an oxygenator (128), whereby the gas exchange unit (112, 128) is in each case divided by a hydr... | 12/09/1997 |
| 5667691 | Process for extracting water and acetic acid from the aqueous phase of cellulose acetate A new process has been developed for separating the water and acetic acid present in the aqueous phase contained in cellulose acetate flakes precipitated from esterification solutions of cellulose. The process includes the step of simultaneously extractin... | 09/16/1997 |
| 5643452 | High-flux hollow-fiber membrane with enhanced transport capability and process for making same Semipermeable membranes are disclosed for purifying aqueous biological fluids. The membranes are particularly suitable for purifying extracorporeal blood via hemodialysis. The membranes, preferably configured as hollow fibers, are made from a hydrophilic ... | 07/01/1997 |
| 5628960 | Composite cellulose nitrate membrane on polyester support There is disclosed a composite isotropic cellulose nitrate membrane on a polyester support and a method of making the same, the membrane having particular utility as various types of reagent-containing test strips for use in analytical chemistry and medic... | 05/13/1997 |
| 5624561 | Cellulose acetate hemodialysis membrane A cellulose acetate membrane composed of a mixture comprising a cellulose triacetate and a cellulose diacetate and having an improved heat stability, which does not substantially show a melting peak of cellulose diacetate but substantially shows a melting... | 04/29/1997 |
| 5620790 | Multi-layer microfiltration membrane having an integrated prefiltration layer and method of making same A multi-layer microfiltration membrane having an integrated prefiltration layer. Pursuant to a phase inversion process, several layers are successively poured out onto one another prior to phase separation of a lower layer, with the viscosity for the pour... | 04/15/1997 |
| 5611930 | Cellulose ester blend membranes, process for making same and their use A method for removing C1 -C3 alkanols from their mixtures with hydrocarbons or heteroatom-containing hydrocarbons wherein the method comprises utilizing a membrane comprising a non-porous separation layer of cellulose ester containin... | 03/18/1997 |
| 5554287 | Cellulose matrix filter material A filter material forming a filter layer consisting substantially exclusively of celluloses and cellulose derivatives. In addition to cellulose acetate fibers, the filter layer contains, in the form of additives, microcrystalline cellulose and microfine c... | 09/10/1996 |
| 5522991 | Cellulosic ultrafiltration membrane A cellulosic ultrafiltration membrane is provided having a microporous base resistant substrate and an ultrafiltration layer form of a cellulose ester or cellulose.... | 06/04/1996 |
| 5505890 | Process for manufacturing cellulose acetate membranes A dialysis membrane in the form of a hollow fiber with a continuous internal cavity is made of cellulose acetate or a cellulose acetate derivative. The membrane has a maximum screen coefficient of 0.04 for albumin with a molecular weight of 68,000. A dial... | 04/09/1996 |
| 5472607 | Hollow fiber semipermeable membrane of tubular braid A hollow fiber membrane ("fiber") comprises a tubular macroporous support coated on its outer surface with a thin tubular asymmetric semipermeable film of polymer. The film, by itself, is non-self-supporting. The support itself is so flexible (flaccid) th... | 12/05/1995 |
