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| Number | Title | Issue Date |
| 7842214 | Process for forming microporous membranes A method for forming a microporous membrane having a microstructure is described. Dope and coagulant formulations are simultaneously cast, where the coagulant formulation diffuses into the dope formulation through an interface effecting a phase inversion forming a m... | 11/30/2010 |
| 7588707 | Multilayered articles having biocompatibility and biostability characteristics Multilayer articles, such as tubing and films, are disclosed which have a soft layer of aliphatic polyurethane and at least one layer of hard aliphatic polyurethane. The articles formed avoid the problem of tackiness when using only a soft aliphatic polyurethane, wh... | 09/15/2009 |
| 7323133 | Method for producing micromanufactured items in ceramic materials A method for producing ceramic micromanufactured items comprises the following stages: a starting material constituting at least a micromanufactured item (1) is prepared and used to from the micromanufactured item (1); said starting material includes a... | 01/29/2008 |
| 7306647 | Mixed matrix membrane with mesoporous particles and methods for making and using the same A mixed matrix membrane for separating gas components from a mixture of gas components is disclosed. The membrane comprises a continuous phase polymer with inorganic porous particles, preferably molecular sieves, interspersed in the polymer. The polymer has a CO | 12/11/2007 |
| 7101624 | Laminate antioxidant film A packaging laminate includes an impermeable outer layer, an inner layer having a gas transmission rate greater than that of the outer layer, and an adhesive layer therebetween. The adhesive layer includes an adhesive resin, a curing agent and a butylated phenolic a... | 09/05/2006 |
| 7087168 | Hollow fiber membrane for purifying blood It is intended to provide a blood purification membrane having excellent performance and showing little elution of blood and little adhesion of blood proteins or platelets. The above object can be achieved by using a moisten membrane, which is free from any membrane... | 08/08/2006 |
| 7070721 | Method of making and using a hollow fiber microfiltration membrane A hollow fiber microfiltration (MF) membrane is provided. The casting solution used to make this membrane includes a fiber-forming polymer having a degree of polymerization greater than about 1000, a water-soluble polymer, an anhydride with about 2 to 12 carbon atom... | 07/04/2006 |
| 6977043 | Skinned hollow fiber membrane and method of manufacture Hollow fiber membranes having a skinned surface on one diameter, and a porous surface on the opposite diameter are produced from perfluorinated thermoplastic polymers by extruding a heated solution of the polymer having a low critical solution temperature directly i... | 12/20/2005 |
| 6797209 | Method and apparatus for high denier hollow spiral fiber An apparatus and method for producing self-texturing hollow fiber that exhibits a desirable tendency to coil rather than to bend sharply or zig-zag. In one embodiment the invention is a spinneret for the production of hollow filament having first and second curved s... | 09/28/2004 |
| 6787216 | Method for manufacturing multiple channel membranes, multiple channel membranes and the use thereof in separation methods A method for manufacturing multiple channel membranes includes extruding a polymer solution through an extrusion nozzle wherein several needles are arranged through which a gas or liquid containing a coagulating agent is injected during extrusion, wherein the outer ... | 09/07/2004 |
| 6623639 | Solvent-resistant microporous polybenzimidazole membranes Solvent-resistant polybenzimidazole membranes, methods of making them and crosslinking them and composite membranes and hollow fiber membrane modules from them are disclosed.... | 09/23/2003 |
| 6596167 | Hydrophilic hollow fiber ultrafiltration membranes that include a hydrophobic polymer and a method of making these membranes A hydrophilic membrane that includes a hydrophobic polymer and a water-soluble polymer-metal complex is provided. This membrane is made by heating a mixture of a hydrophobic polymer, a metal compound, and a water-soluble polymer. The water-soluble polymer... | 07/22/2003 |
| 6527987 | Process for producing regenerated cellulosic fibers It is an object of the present invention to overcome the problem of fibrillation which is a drawback found in solvent-spun regenerated cellulosic fibers and to thereby provide high-quality regenerated cellulosic fibers. The regenerated cellulosic fibers a... | 03/04/2003 |
| 6455618 | Thermoplastic elastomer molding compositions with improved processability Described is a thermoplastic molding composition comprising: a) 0.05 to 1.5 wt. %, with respect to the entire molding composition, of a fatty acid amide ester wax; b) 0.5 to 10 wt. %, with respect to the entire molding composition, of a silica selected fr... | 09/24/2002 |
| 6447835 | Method of coating polymeric tubes used in medical devices The present invention relates to a method of preparing a coated hollow polymeric tubular member useful in medical devices. The method involves a simple, unique method of simultaneously extruding and coating the polymeric tube.... | 09/10/2002 |
| 6398039 | High efficient acid-gas-removing wicking fiber filters An unique filtration device (10) which removes acidic contaminants such as H2S and SO2 from a fluid stream through the use of partially hollow wicking fibers (20) impregnated with an effective amount of alkaline-generating chemical compounds, preferably a... | 06/04/2002 |
| 6299773 | Porous polyvinylidene fluoride resin film and process for producing the same A porous hollow fiber polyvinylidene fluoride resin membrane, characterized in that the membrane has a unitary three-dimensional network structure entirely composed of a polyvinylidene fluoride resin and has an inside diameter of 1.5-5 mm and a wall thick... | 10/09/2001 |
| 6245183 | Process for manufacturing tubing having a metal layer with an external surface overlaying by multiple plastic layers bonded thereto A multi-layer tube comprises a metal tube having an outer surface and a zinc layer bonded to the metal tube outer surface, wherein the zinc layer is selected from the group consisting of zinc plating, zinc nickel alloys, zinc cobalt alloys, zinc aluminum ... | 06/12/2001 |
| 6238545 | Composite anode, electrolyte pipe section, and method of making and forming a pipeline, and applying cathodic protection to the pipeline An anode is embedded in an electrolyte layer applied to the surface of a structure such as a pipe section to provide an ionic conductive path between the anode and structure to supply cathodic protection to the structure, where the natural environment may... | 05/29/2001 |
| 6218441 | Melt-spun polysulfone semipermeable membranes and methods for making the same The present invention discloses, inter alia, a composition useful for producing a homogeneous, semipermeable membrane, the composition comprising (1) a polysulfone compound, (2) a solvent, such as sulfolane, antypyrine, δ-valerolactam, diethyl phthalate,... | 04/17/2001 |
| 6120718 | Process of making hollow filaments A process for producing hollow polyamide filaments having at least one continuous void that adds to a fiber-forming polyamide from about 0.05% to about 5% of a triazine compound prior to extrusion of fiber. The process results in a greater closure of void... | 09/19/2000 |
| 6013158 | Apparatus for converting coal to hydrocarbons An apparatus for forming liquid hydrocarbons from solid coal. The coal is pulverized to provide a particulate coal feed, which is then extruded to provide a hollow tube of compressed coal supported inside of a support tube. A clay feed is extruded to prov... | 01/11/2000 |
| 5902524 | Method and apparatus for heat treatment of an extrusion to extract chemicals and gases for injection into a second cold extrusion of inert media to combine and liquefy these in production of a product A method and apparatus in which an extruder with vacuum evacuation and gas injection means is multi-charged with a plurality of materials to extrude these over streamlined fuel-admitting pipes to make a laminated tubular feedstock serving as a moving encl... | 05/11/1999 |
| 5891572 | Method of preparing membranes from blends of polymers Improved anisotropic fluid separation membranes are prepared from blends of polymers with surface energy differences. The membranes are formulated by processes wherein low surface energy polymer with desirable fluid separation and permeation characteristi... | 04/06/1999 |
| 5858287 | Extrusion method of producing a polymeric sealing/spring strip The present invention pertains to a polymeric sealing/spring strip and method of producing same. The polymeric sealing/spring strip of the present invention has several various embodiments which are based upon the incorporation of silicone rubber. Some of... | 01/12/1999 |
| 5789042 | Thin LCP film process A process for producing LCP films that have improved tear resistance, improved balance of physical properties, and relatively wrinkle-free surfaces. An annular co-extrusion die is used to line the LCP with one or more surface layers of a nonadherent polym... | 08/04/1998 |
| 5789029 | Stretch film and fabrication method Multilayer thermoplastic stretch wrap film having substantial one-sided cling properties is made without the use of polymers with high levels of n-hexane extractables, dissimilar polymer chemistries, or low molecular weight tackifiers. The reverse or clin... | 08/04/1998 |
| 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 |
| 5776223 | Method of making shaped fibers In a method of making a shaped fiber, a stream of fiberizable material is provided with an original shape and a void fraction from 20% to 80%. The void fraction can be provided by forming a hollow stream, a porous stream or a significantly shaped stream. ... | 07/07/1998 |
| 5743932 | Method of making an insulation product from hollow fibers A method of making an insulation product of hollow fibers whereby molten insulation material is centrifuged through a plurality of orifices and gas is directed into the molten insulation material through a plurality of gas conduits, wherein each gas condu... | 04/28/1998 |
| 5733657 | Method of preparing membranes from blends of polymers Improved anisotropic fluid separation membranes are prepared from blends of polymers with surface energy differences. The membranes are formulated by processes wherein low surface energy polymer with desirable fluid separation and permeation characteristi... | 03/31/1998 |
| 5707737 | Cellulose acetate fiber having non-circular cross section, multi-filaments thereof, and process for the production thereof A cellulose acetate fiber excellent in gloss and feeling, formed from a mixture which consists essentially of (a) 100 parts by weight of cellulose acetate and (b) 5 to 40 parts by weight of a polymer substance which can plasticize the cellulose acetate, w... | 01/13/1998 |
| 5686121 | Spinneret for producing a filament having a triangular cross-section and 3 or 6 axially extending voids A spinneret plate for producing triangular; thermoplastic polymer filaments having 3 or 3 pair axially extending voids located along the convex sides of the filament.... | 11/11/1997 |
| 5670044 | Cylindrical filter and process for producing the same A cylindrical filter formed of stacked microfine, conjugate fibers consisting of a higher melting point component and a lower melting point component, the fiber diameter of the conjugate fibers being varied into a smaller one in the thickness direction of... | 09/23/1997 |
| 5604012 | Hollow fiber fabric and process for producing the same A hollow fiber fabric comprising hollow fibers having a high hollowness ratio of at least 20% and composed of a polymer of a single composition, and the hollow fibers having slits as traces of a removed polymer and the slits being formed in the longitudin... | 02/18/1997 |
| 5562874 | Multilayered antioxidant film A coextruded multilayer film having increased retention of volatile antioxidants and process for making the film. The multilayer film includes an antioxidant layer containing a volatile antioxidant, said antioxidant layer being semipermeable to the volati... | 10/08/1996 |
| 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 |
| 5487859 | Process of making fine polyester hollow filaments A post-coalescence melt-spinning process for preparing fine undrawn hollow polyester filaments having excellent mechanical quality and uniformity at high speeds (2-5 km/min) involving selection of polymer viscosity and spinning conditions, whereby the voi... | 01/30/1996 |
| 5464584 | Process for making soil and stain resistant carpet fiber A method for producing carpet yarn produces yarn having substantial soil hiding, soil repelling and resistance to staining with acid dye characteristics. The yarn is made by forming at least one hollow trilobal fiber from a molten nylon polymer having an ... | 11/07/1995 |
| 5464670 | Resin bound magnet and its production process A resin bonded magnet including a rare earth magnetic powder and an organic resin moulded into a single body having a cylindrical form. The resin bonded magnet satisfies the condition: 2 DL/d2 ࣙ1.56 where D is the outer diameter of the magnet, d i... | 11/07/1995 |
