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| Number | Title | Issue Date |
| 7582213 | Cellulose fiber-based filters The present invention comprises an improved method for refining cellulose that produces a highly refined cellulosic material. The method comprises soaking raw material in a mild NaOH using reduced temperatures and pressures, and refining the material with a plate re... | 09/01/2009 |
| 7195233 | Aerator The invention relates to an aerator consisting of a porous plastic moulded body with pores that are smaller on the air outflow side (A) than on the air inflow side (B) lying opposite. The inventive aerator is particularly suitable for use in sewage treatment plants.... | 03/27/2007 |
| 6972093 | Onboard fuel separation apparatus for an automobile An onboard fuel separation apparatus separates a material fuel (gasoline) into a high-octane fuel having a higher octane value than the material fuel and a low-octane fuel having a lower octane value than the material fuel using a separation membrane which selective... | 12/06/2005 |
| 6921308 | Engine and personal watercraft A personal watercraft and engine therefor are provided. The engine typically is mounted in a personal watercraft and configured to discharge an exhaust gas through a water muffler. The engine typically includes a cylinder head forming a combustion chamber, wherein t... | 07/26/2005 |
| 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 |
| 6387272 | Process for utilizing liquid manure material A process for utilizing the material of ammonium-containing effluent which contains further soluble constituents and, possible additional solids, comprising: a) optionally separating off the solids, b) concentrating the substantially solids-free ammonium-conta... | 05/14/2002 |
| 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 |
| 5858238 | Salvage of autologous blood via selective membrane/sorption technologies Methods and apparatuses for salvaging blood from a patient are disclosed. A blood salvaging and/or blood processing circuit coupled to a cardiopulmonary bypass circuit, cardiotomy circuit, or directly to the patient comprises a hemocentrator for removing ... | 01/12/1999 |
| 5846213 | Cellulose membrane and method for manufacture thereof Cellulose films useful as wound and bum dressings are prepared from a solution of cellulose produced by Acetobacter xylinum in a stirred tank. The materials of this invention comprise a film of microbially produced cellulose, particularly cellulose produc... | 12/08/1998 |
| 5624566 | Method and apparatus for recovering carboxylic acids from dilute solutions A method for recovering carboxylic acids from a dilute aqueous solution thereof having a concentration below about ten percent (10%) by weight, which includes passing the dilute acid solution through a reverse osmosis separator, thereby producing a permea... | 04/29/1997 |
| 5508196 | Method of continuously preparing a sterile culture medium A method for continuously preparing a sterile culture medium comprises combining separate unsterilized fluid components in separate streams into a single mainstream. The mainstream is applied to a transverse flow filtration module having a membrane which ... | 04/16/1996 |
| 5492625 | Method of recovering carboxylic acids from dilute solutions A method for recovering carboxylic acids from a dilute aqueous solution thereof having a concentration below about ten percent (10%) by weight, which includes passing the dilute acid solution through a reverse osmosis separator, thereby producing a permea... | 02/20/1996 |
| 5491259 | Process to produce aminocarboxylic acids containing low residual salt A method for producing an aqueous solution of an aminocarboxylic acid from an aqueous solution of an alkali metal salt of the aminocarboxylic acid is disclosed. The first step of the method is to adjust the pH of the aqueous solution of the alkali metal s... | 02/13/1996 |
| 5456842 | Method for recycling cleaning fluid A method and apparatus for recycling water based workpart cleaning fluid of the type used to wash workparts (B) free of soils, such as emulsified and non-emulsified cutting oils and lubricants, particulate matter and other hydrophobic fluids. A parts wash... | 10/10/1995 |
| 5401499 | Method of adsorbing pyrogens An insoluble material for adsorbing a pyrogen comprising a polymer of an aziridine compound. According to the present invention, a large mount of the pyrogen can be easily removed from a solution containing pyrogen, and a large amount of the material for ... | 03/28/1995 |
| 5259972 | Apparatus and method for purifying water In an apparatus and method for purifying water, an oxidation forcibly turns colloidal substances into fine particles of oxides, thus increasing the size of the particles. The effluent of oxidation process is treated by ion exchange process, and then treat... | 11/09/1993 |
| 5258122 | Cross-flow filter device with pressure-balancing feature This invention relates to cross-flow filtration and more particularly towards disposable, compact cross-flow filters and filtration methods incorporating a novel pressure-balancing arrangement comprising a flexible wall which expands and contracts in resp... | 11/02/1993 |
| 5221483 | Process and apparatus for removal of DNA, viruses and endotoxins A single filtration device containing coated filter membranes and absolute pore filters is provided in which the membranes and absolute pore filters are present in two sections of the filter device. The filter device will remove up to about 98% of the end... | 06/22/1993 |
| 5165919 | Medical material containing covalently bound heparin and process for its production A medical material comprising a high-molecular weight material and a heparin derivative is provided, which high-molecular weight material comprises a high-molecular weight compound having functional groups capable of binding with epoxy groups, a compound ... | 11/24/1992 |
| 5076933 | Process and apparatus for removal of DNA and viruses A single filtration device containing coated filter membranes and absolute pore filters is provided in which the membranes and absolute pore filters are present in two sections of the filter device. The filter device will remove viruses, as modeled by typ... | 12/31/1991 |
| 5045206 | Selective multi-ring aromatics extraction using a porous, non-selective partition membrane barrier Multi-ring aromatic hydrocarbons and/or toxins are selectively solvent extracted from hydocarbon feed streams by the process comprising contacting the aromatics and/or toxins containing hydrocarbon stream with one side of a porous, non-selective partition... | 09/03/1991 |
| 5028337 | Coated membranes Composite membranes are provided comprising an underlying membrane selected from the group consisting of microfiltration, ultrafiltration and reverse osmosis membranes; and a coating thereon comprising at least one member selected from the group consistin... | 07/02/1991 |
| 5015387 | Method for activating cellulosic membrane, activated cellulosic membrane, method of fixing physiologically active substance on the activated cellulosic membrane and physiologically active substance-fixed membrane A method for activating a membrane comprising cellulose as a main component, by reacting the membrane with a compound of the formula Cl-SO2 -R or Cl-CO-R1 where R is an optionally substituted alkyl or phenyl group and R1 i... | 05/14/1991 |
| 4931181 | Composite membranes for fluid separations A method for designing and making composite membranes having a microporous support membrane coated with a permselective layer. The method involves calculating the minimum thickness of the permselective layer such that the selectivity of the composite memb... | 06/05/1990 |
| 4919865 | Composite membranes of poly (methyl methacrylate) blends, their manufacture and their use Composite membranes are disclosed having a separation layer comprised of a mixture of poly(methy methacrylate) or a copolymer thereof and at least one cellulosic derivative resulting in enhanced separation and permeating characteristics of the overall com... | 04/24/1990 |
| 4906374 | Filtration media with low protein adsorbability A porous polymeric medium having a low affinity for amide group-containing materials is provided comprising a porous polymeric substrate and a surface-modifying polymeric material having a low affinity for amide group-containing materials formed in situ a... | 03/06/1990 |
| 4894165 | Rejection enhancing coatings for reverse osmosis membranes Reverse osmosis membranes treated with polymers bearing carboxylic acid groups and optionally pendant hydroxyl or amide moieties display enhanced salt rejection and/or increased water flux. This treatment is particularly useful for improving the membrane ... | 01/16/1990 |
| 4888116 | Method of improving membrane properties via reaction of diazonium compounds or precursors A method of improving the properties of a reverse osmosis membrane having a polyamide discriminating layer containing residual aromatic primary amine groups is described. In this method, the polyamide discriminating layer of the membrane is treated with a... | 12/19/1989 |
| 4880511 | Process and apparatus for recovery of precious metal compound A process and an apparatus for recovering a precious metal compound, in which the precious metal compound is separated from impurity metals by use of a reverse osmotic membrane, and the separated precious metal compound is recovered in a concentrated stat... | 11/14/1989 |
| 4857201 | Reverse osmosis cellulose and cellulosic membranes prepared by repeated drying and rewetting The ability of cellulose membranes to separate solutes from solvents under reverse osmosis conditions is significantly improved by subjecting the membrane prior to use to several cycles of drying and rewetting.... | 08/15/1989 |
| 4853129 | Modified regenerated cellulose membrane for non-aqueous separations Regenerated cellulose membranes used for the separation of organic liquids, for example, ketone dewaxing solvents from dewaxed oil or NMP extraction solvents from extract, have their solute rejection capability enhanced by chemical modification by contact... | 08/01/1989 |
| 4812238 | Membranes prepared via reaction of diazonium compounds or precursors An improved reverse osmosis membrane and process for making the same is described. The membrane is prepared by treating a polymer bearing primary amine groups with nitrous acid or a diazonium compound so as to react the resulting diazonium groups with oth... | 03/14/1989 |
| 4810388 | Portable intravenous solutions and water for injection apparatus and method A portable assembly of components that is designed to produce sterile, intravenous solutions and water for injection in the field, under combat conditions and from various sources of raw feedwater. A single frame supports the components of the invention c... | 03/07/1989 |
| 4808315 | Porous hollow fiber membrane and a method for the removal of a virus by using the same There is disclosed a novel porous hollow fiber membrane which is characterized by such a unique porous structure that the inner and outer membrane surfaces have an in-a-plane average pore diameter of 0.01 to 10 μm and the porous membrane wall has an in-a... | 02/28/1989 |
| 4784771 | Method and apparatus for purifying fluids A method and apparatus for purifying and/or separating fluids including passing such fluid from a feed side of a reverse osmosis unit to the product side of such unit and to an ultimate user during a purifying cycle and recirculating residual fluid back t... | 11/15/1988 |
| 4770786 | Separation of organic liquid from mixture employing porous polymeric ultrafiltration membrane A process for separating and condensing at least one selected organic liquid from a feed comprising a mixture thereof in the state of one phase or two phases which comprises conducting ultrafiltration by using a polymeric porous membrane having a mean por... | 09/13/1988 |
| 4759850 | Membrane process for separating methanol from methanol/hydrocarbon solutions A reverse osmosis process is described for removing alcohols from hydrocarbons, in the additional presence of ethers. Depending on the nature of the membrane used, the methanol can be selectively removed as the membrane permeate or retained as the membran... | 07/26/1988 |
| 4758347 | Process for purifying dyeing wastewaters There is disclosed a process for purifying/decolorizing dyeing wastewaters that have been adjusted in a pretreatment step to a pH in the range from 4 to 9 by addition of acid or alkali by means of a membrane separation process. The concentrate obtained af... | 07/19/1988 |
| 4735193 | Separation of a monosaccharide with mixed matrix membranes A process for separating a monosaccharide from an aqueous solution comprising monosaccharides and a second component comprising a polysaccharide. The mixture is contacted with a mixed matrix membrane comprising a adsorbent or molecular sieve material disp... | 04/05/1988 |
