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| Number | Title | Issue Date |
| 7556677 | Solvent resistant asymmetric integrally skinned membranes There is provided an asymmetric integrally skinned membrane comprising a polyimide and another polymer selected from the group consisting of polyvinylpyrrolidone, sulfonated polyetheretherketones and mixtures thereof. The membrane which is substantially insoluble in... | 07/07/2009 |
| 7435284 | Parallel-plate diffusion gas dehumidifier and methods for use A parallel-plate diffusion gas dehumidifier has a treatment zone having at least one water-permeable membrane. The gas dehumidifier includes an untreated gas inlet, a treatment zone bounded by water-permeable membranes, a support structure for the membranes, access ... | 10/14/2008 |
| 7422623 | Separation membrane by controlled annealing of polyimide polymers This abstract discusses membranes needed to separate fluids for the production of oxygen-enriched air, nitrogen-enriched-air, for the separation of carbon dioxide from hydrocarbons, and the separation of hydrogen from various petrochemical and oil refining streams. ... | 09/09/2008 |
| 7404844 | Method for making carbon membranes for fluid separation There is disclosed a method of making a high performance carbon membranes from polymer membranes. The method comprising the steps of exposing polymer precursor compounds to a polar organic liquid before pyrolysis of the exposed polymer precursor compounds. ... | 07/29/2008 |
| 7393388 | Spiral wound fuel stabilization unit for fuel de-oxygenation A deoxygenator includes a plurality of permeable membranes spirally wound about an exhaust tube for removing dissolved oxygen from a hydrocarbon fuel. The permeable membrane is spirally wrapped about the exhaust tube and defines fuel passages and exhaust passages. T... | 07/01/2008 |
| 7393383 | Separation membrane made from blends of polyimide with polyamide or polyimide-amide polymers Membranes are used to separate fluids for the production of oxygen-enriched air, nitrogen-enriched-air, for the separation of carbon dioxide from hydrocarbons, and the separation of hydrogen from various petrochemical and oil refining streams. Membranes are discusse... | 07/01/2008 |
| 7344578 | Breather valve device for the container for an electronic control unit A breather valve device for a container for an electronic control unit, includes a support structure including, a substantially planar wall having first and second surfaces intended to face outwardly and inwardly of the container respectively, and in which is formed... | 03/18/2008 |
| 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 |
| 7303609 | Manufacture of polyimide-hollow fibres A process for the manufacture of a polyimide hollow fibre comprising: (i) providing a dope solution comprising one or more polyimides dissolved in a solvent comprising 60-100 wt % N-methylpyrollidone and 0-40 wt % ethanol, (ii) providing a bore fluid, (iii) generati... | 12/04/2007 |
| 7264650 | Ultrahigh-selectivity oxygen enrichment filled elastomeric silicone polymer membrane incorporating nanofillers A semipermeable separation element includes (a) a porous substrate, and (b) a film formed on the microporous substrate; the film comprising a silicone elastomer and a nanoparticle filler. The film preferably has an oxygen enrichment selectivity of at least 30, or ev... | 09/04/2007 |
| 7247191 | Crosslinked and crosslinkable hollow fiber membrane and method of making same utility A composition of and a method of making high performance hollow fiber membranes is described. The membranes have a high resistance to plasticization by use of a predetermined amount of crosslinking. The preferred polymer material for the membrane is a polyimide poly... | 07/24/2007 |
| 7235538 | Heterocyclic compounds, which are inhibitors of the enzyme DPP-IV The present invention relates to therapeutically active and selective inhibitors of the enzyme DPP-IV, which are of formula I wherein each n is one or two independently and R1, R2, R3 | 06/26/2007 |
| 7214332 | Flame-resistant-thermoset coating A thermosetting-resin-based coating that is capable of forming a substantially flame-resistant barrier upon being exposed to heat. The coating includes a thermoset resin, an acid catalyst having a pKa value of less than 2, a filler selected from glass, mica, talc, p... | 05/08/2007 |
| 7179322 | Oxygen and nitrogen enriched atmospheres in aircraft A method of supplying oxygen rich air to the passengers and crew on board a passenger aircraft by use of a highly permeable oxygen enrichment unit, wherein the fiber tubes of the hollow fiber membranes used to separate normal air into oxygen rich and nitrogen rich f... | 02/20/2007 |
| 7169885 | Polyimide membranes The present invention deals with a process for treating a polyimide comprising exposing said polyimide to a compound selected from the group consisting of dendrimers, hyperbranched polymers and mixtures thereof. The polyimide may be in the form of a membrane and the... | 01/30/2007 |
| 7166146 | Mixed matrix membranes with small pore molecular sieves and methods for making and using the membranes A mixed matrix membrane is provided which comprises a continuous phase organic polymer and small pore molecular sieves dispersed therein. The molecular sieves have a largest minor crystallographic free diameter of 3.6 Angstroms or less. When these molecular sieves a... | 01/23/2007 |
| 7166148 | Gas separation membranes A method of producing composite, hollow fibre gas separation membranes, wherein external surfaces of the porous hollow fibre tubes used in the construction of the membranes are subjected to a modification technique before the external surfaces are coated with a thin... | 01/23/2007 |
| 7160356 | Dithiolene functionalized polymer membrane for olefin/paraffin separation A polymeric composite may be used for forming fluid separation membranes. The membranes may be formed from polyimide, polyamide or poly (pyrrolone-imide) materials. Polyamides may be formed by the condensation of a tetraamine, a tetraacid, and a diamine. Polyimides ... | 01/09/2007 |
| 7148314 | Process for preparation of functionalized polyimides A method for preparation of a sulfonic and or sulfonic acid salt containing polyimide resins comprising melt reaction of a polyimide resin with an organic compound, wherein the organic compound contains at least one aliphatic primary amine functionality and at least... | 12/12/2006 |
| 7138006 | Mixed matrix membranes with low silica-to-alumina ratio molecular sieves and methods for making and using the membranes A mixed matrix membrane is provided which comprises a continuous phase organic polymer and small pore alumina containing molecular sieves dispersed therein. The molecular sieves have a silica-to-alumina molar ratio of less than 1.0, more preferably, less than 0.3, a... | 11/21/2006 |
| 7097682 | Ventilation filter medium for container, and container and container cap equipped with ventilation filter medium The present invention provides a culture container and a cap for a container having a ventilation filter medium or a medium similar thereto that can exchange carbon dioxide gas in the culture container with atmospheric air, and prevent the contamination of sterilize... | 08/29/2006 |
| 7097690 | Apparatus and method for removing gasses from a liquid Medical devices for removing gasses, such as gas bubbles and/or dissolved gasses, from a liquid to be delivered to a patient, and methods of use and making of such devices. In at least some embodiments, a gas permeable membrane material is used in the construction o... | 08/29/2006 |
| 7083660 | Casing member and method for manufacturing the same A connector casing E required to have a sealing property includes a cover 2. The cover 2 has a cover main body 10 provided with a large vent hole H0 passing through the connector casing E in an inward and outward direction and having ... | 08/01/2006 |
| 7074256 | Phosphazene membranes for gas separations A polyphosphazene having a glass transition temperature (“Tg”) of approximately −20° C. or less. The polyphosphazene has at least one pendant group attached to a backbone of the polyphosphazene, wherein the pendant group has no halogen atoms. In ad... | 07/11/2006 |
| 7060372 | Polymers having attached luminescent metal complexes and devices made with such polymers The present invention is generally directed to a polymeric metal complex comprising a polymeric material having a plurality of a first-type functional groups, wherein at least a portion of the functional groups are coordinated to at least one metal containing comple... | 06/13/2006 |
| 7025804 | Method for separating hydrocarbon-containing gas mixtures using hydrocarbon-resistant membranes A method of separating or concentrating hydrocarbon-containing gas mixtures such as hydrogen from hydrocarbons, carbon dioxide from hydrocarbons, nitrogen from hydrocarbons, and hydrocarbons from one another using a selectively permeable membrane. The method is well... | 04/11/2006 |
| 7022810 | Proton exchange membrane materials for the advancement of direct methanol fuel-cell technology A new class of hybrid organic-inorganic materials, and methods of synthesis, that can be used as a proton exchange membrane in a direct methanol fuel cell. In contrast with Nafion® PEM materials, which have random sulfonation, the new class of materials have ordere... | 04/04/2006 |
| 7018445 | Polyimide blends for gas separation membranes The present invention provides a selectively gas permeable membrane that has a superior combination of permeability and selectivity. The membrane composition includes a Type 1 copolyimide uniformly blended with a Type 2 copolyimide, which polymers are defined by che... | 03/28/2006 |
| 7011694 | CO-selective membranes containing amino groups Novel compositions suitable for fabrication of CO2-selective membranes are disclosed. In one aspect, the present invention is directed to compositions comprising polyimide/polyamine blends and copolymers, and to compositions comprising interfacially polym... | 03/14/2006 |
| 6997971 | Cross-linked polybenzimidazole membrane for gas separation A cross-linked, supported polybenzimidazole membrane for gas separation is prepared by reacting polybenzimidazole (PBI) with the sulfone-containing crosslinking agent 3,4-dichloro-tetrahydro-thiophene-1,1-dioxide. The cross-linked reaction product exhibits enhanced ... | 02/14/2006 |
| 6994811 | Method of manufacturing membranes and the resulting membranes This invention provides a process for making microporous membranes from a polymer solution and the membranes therefrom. A thermal assist, such as heating of the polymer solution can be effected subsequent to shaping the solution, such as by forming a film, tube or h... | 02/07/2006 |
| 6994788 | Sulfonated aromatic polymers, membrane containing said polymers and a method for production and use of the same A sulfonated aromatic polymer comprising the repeating structural unit of the formula I —O—Ar1(SO3R)n—C(CF3)2—Ar1(SO3R)n—O—Ar2—(X—Ar2 | 02/07/2006 |
| 6986802 | Selective separation of fluid compounds utilizing a membrane separation process Apparatus and processes are disclosed for economical separation of fluid mixtures utilizing perm-selective membranes. Broadly, apparatus of the invention comprises a plurality of membrane modules comprising a solid perm-selective membrane and equipment for controlli... | 01/17/2006 |
| 6977009 | Metal coated polymer electrolyte membrane having a reinforcement structure A metal-coated, wire-reinforced polymer electrolyte membrane that is permeable only to protons and hydrogen is disclosed. The metal-coated, wire-reinforced polymer electrolyte membrane has a surface microstructure that prevents cracking of the metal coating during h... | 12/20/2005 |
| 6955712 | Proton-conducting polymer with acid groups in side chains, preparation method thereof, polymer membrane manufactured using the polymer, and fuel cell using the polymer membrane A proton-conducting polymer, a preparation method thereof, a polymer membrane manufactured from the proton-conducting polymer, and a fuel cell having the polymer membrane are provided. The proton-conducting polymer contains an acid-bearable aromatic group covalently... | 10/18/2005 |
| 6953492 | Membrane technology to reduce nitrogen in natural gas An apparatus and process for providing purified natural gas wherein a natural gas feed mixture of hydrocarbons, nitrogen, and other permeable gases is provided to a semi-permeable membrane separator having a relatively higher selectivity for methane and other hydroc... | 10/11/2005 |
| 6946015 | Cross-linked polybenzimidazole membrane for gas separation A cross-linked, supported polybenzimidazole membrane for gas separation is prepared by layering a solution of polybenzimidazole (PBI) and α,α′dibromo-p-xylene onto a porous support and evaporating solvent. A supported membrane of cross-linked poly-2,2′-(m-phen... | 09/20/2005 |
| 6932859 | Crosslinked and crosslinkable hollow fiber membrane and method of making same A composition of and a method of making high performance hollow fiber membranes is described. The membranes have a high resistance to plasticization by use of a predetermined amount of crosslinking. The preferred polymer material for the membrane is a polyimide poly... | 08/23/2005 |
| 6929682 | Sorbent capsule An adsorbent capsule including a core of pressed adsorbent material having a water-insoluble binder, and a water-vapor or permeable coating of water-based resin, namely, hydroxypropylmethylcellulose. ... | 08/16/2005 |
| 6923846 | Method of preparing composite gas separation membranes from perfluoropolymers A method for fabricating a composite membrane includes coating a substrate, such as, for example, an asymmetrical porous hollow fiber substrate, with a solution which includes a perfluorinated polymer and a perfluorinated solvent. Prior to coating, the substrate is ... | 08/02/2005 |
