Class 210/500.4 - Carbonate

Subclass of Class 210 - Liquid purification or separation
Definition: Subject matter comprising a -CO₃ group.
No. of patents: 45
Last issue date: 10/21/2008

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Number	Title	Issue Date
7438193	Nanoporous membrane and method of fabricating the same Provided are a nanoporous membrane and a method of fabricating the same. The nanoporous membrane includes a support, and a separation layer including a plurality of nano-sized pores at a density of 1010/cm2 or greater and a matrix. The nanoporo...	10/21/2008
7347938	Use of hydrophobically modified copolymers based on N-vinyl monomers for the production of membranes The present invention relates to the use of copolymers A containing a) from 50 to 99% by weight of at least one N-vinyllactam or N-vinylamine selected from the group consisting of N-vinylpyrrolidone, N-vinylpiperidone, N-vinylcapro...	03/25/2008
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
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
6527955	Heat-activatable microporous membrane and its uses in batteries A novel microporous membrane comprising a hot-melt adhesive and an engineering plastics, the methods of preparing such microporous membrane and the uses of the microporous membrane in, e.g., batteries, super capacitors, fuel cells, sensors, electrochromic...	03/04/2003
5979670	Large pore synthetic polymer membranes Highly asymmetric polymeric membranes with large pores which yield bubble points in the range of 0.5 to 25 psid and superior flow characteristics. The membranes can be cast from both metastable dispersions and from homogenous casting formulations. The tec...	11/09/1999
5942120	Composite microporous ultrafiltration membrane, method of making thereof, and separation methods Microporous ultrafiltration membranes containing polymeric material having oxyalkylene tentacles dangling from a carbon backbone can be improved for separation of micromaterials such as salts, unicellular pathogens and the like by separating said tentacle...	08/24/1999
5891338	Heat-sterilizable membrane Heat-sterilizable membranes are disclosed comprising at least two hydrophobic polymers which are normally immiscible with each other, and in which at least one of the hydrophobic polymers is normally unstable under sterilization conditions while at least ...	04/06/1999
5708040	Method for preparing porous membranes utilizing water or organic vapor adsorption The present invention describes a method for preparing an asymmetric porous membrane by a dry-wet phase inversion method, which comprises contacting a cast or spun polymer solution with water or organic vapor prior to immersing into the non-solvent precip...	01/13/1998
5695640	Hydrophilized porous article A hydrophilic porous article is provided. The article comprises a hydrophobic porous substrate having coated on at least one external surface and on the internal surface a polyamide. Also provided is a method for making the hydrophilic porous article comp...	12/09/1997
5525236	Reverse osmosis purification of water Addition of minor amounts of polymeric ethers, having oxyalkylene tentacles dangling from a carbon backbone, to ultrafiltration membranes improves rate of flow of purified water....	06/11/1996
5520809	Separation membranes This invention relates to separation membranes composed of a mixture of two kinds or more of polymers containing at least one kind of polymer selected from polyesters, polyethers, polycarbonates, polyamides, and polyimides with a fluorene skeleton and pos...	05/28/1996
5444097	Porous polymeric structures and a method of making such structures by means of heat-induced phase separation Porous polymeric structures are provided along with a method to make such structures comprising heat-induced phase separation of a polymeric solution exhibiting a lower critical solution temperature....	08/22/1995
5308489	Blends of polyether copolycarbonates and high molecular weight film-forming thermoplastics The invention relates to blends of polyether copolycarbonates and other thermoplastics, to their production and to their use for the production of membranes, more particularly for dialysis....	05/03/1994
5304307	Chargedasymmetric mosaic membrances The present invention relates to semipermeable mosaic polymer membranes of asymmetric structure and with a macroscopic distribution of the mosaic-forming anionic and cationic charges (sites). The membranes can be prepared by casting a polymer solution of ...	04/19/1994
5277811	Process for forming porous polymeric product from a nonporous polymeric composition and product A product having a porous polymeric structure is formed from a non-porous polymeric sheet by sequential contact of the non-porous sheet with a solvent for the sheet and then a non-solvent for the sheet. The porous product can be porous through all or a po...	01/11/1994
5266391	Composite porous membranes The composite membrane is disclosed having a microporous support which is coated with a polymer selected from the group consisting of polyethylene oxide, polyacrylic acid, poly(methyl methacrylate) and polyacrylamide wherein there is no pore filing of the...	11/30/1993
5232600	Hydrophobic membranes A process for the preparation of a microporous polymeric membrane is provided which includes polymerizing a polymerizable fluorine-containing monomer in the presence of a microporous polymeric membrane substrate such that the fluorine-containing monomer f...	08/03/1993
5228994	Composite microporous membranes A composite microporous membrane is provided having a microporous nonretentive substrate and a retentive microporous layer coated directly to the substrate in the absence of an intermediate support layer....	07/20/1993
5100555	Method and system for removing radon from radon containing water Method and apparatus are described for removing dissolved radon gas from water for the purpose of reducing the exposure of household occupants to elevated airborne Rn levels, using a radon-permeable membrane at the interface between gaseous and liquid pro...	03/31/1992
5034130	Method for producing a composite membrane and the composite membrane The invention is a method for producing a composite membrane useful as a functional membrane which comprises mixing polyamide and polyester in a solvent to obtain a mixed solution and preparing the membrane while removing the solvent from the mixed soluti...	07/23/1991
5019666	Non-porous polycarbonate membranes for separation of aromatics from saturates The present invention is a method for separating aromatics from saturates using a non-porous polycarbonate membrane. In a preferred embodiment, the polycarbonate membrane may be crosslinked....	05/28/1991
5012035	Polyphthalatecarbonate membranes for aromatics/saturates separation The present invention describes a method for separating mixtures of aromatics and non-aromatics into aromatic-enriched and non-aromatic-enriched streams by contacting the mixture with one side of a polyphthalate-carbonate membrane and selectively permeati...	04/30/1991
4975228	Process for preparing membranes from tetrahalobisphenol polycarbonates A process for the preparation of a membrane comprising bisphenol-based polycabonate wherein at least 25 percent by weight of the bisphenol moieties are tetrahalogenated wherein the halogen is Cl or Br, and the membrane prepared by such process. The proces...	12/04/1990
4950405	Functional thin organic membrane A functional thin organic membrane comprising a monomolecular film which contains at least one organic amphoteric host molecule having a reactive functional group capable of chemically binding with a nucleophilic functional group at room temperature....	08/21/1990
4935140	Membrane and process for producing the membrane A membrane for hemodialysis is prepared by casting, extruding or spinning a solution of a polyether-polycarbonate block copolymer and a swelling agent having a molecular weight of about 1,000 to about 20,000 Daltons, then partially evaporating the solvent...	06/19/1990
4867881	Orientied microporous film A microporous article is provided. The article comprises a thermoplastic polymeric structure having a plurality of cells with adjacent cells being interconnected by passageways to provide a network of communicating pores. The structure is oriented in at l...	09/19/1989
4855049	Microporous membrane obtained by the irradiation of two faces and process for obtaining the same A first irradiation takes place with particles having an inadequate energy to traverse the membrane (5), followed by a second irradiation from the other face (26) of the membrane (5) using also non-issuing particles and whose trajectories come into contac...	08/08/1989
4774039	Dispersing casting of integral skinned highly asymmetric polymer membranes There is disclosed, in one aspect, an improved highly asymmetric membrane comprising a skin and a porous asymmetric support. The skin contains pores which have an mean pore diameter of from about 0.005 to about 3.0 microns and the asymmetric support compr...	09/27/1988
4772392	Process for preparing POWADIR membranes from tetrahalobisphenol A polycarbonates The invention is a process for the preparation of a POWADIR membrane comprising bisphenol-based polycarbonates wherein at least 25 percent by weight of the bisphenol moieties are tetrahalogenated wherein the halogen is Cl or Br, and the membrane prepared ...	09/20/1988
4764320	Method for preparing semipermeable membrane compositions Semipermeable membranes with improved permeation flux are prepared by contacting a glassy polymer in the form of a hollow fiber or film with a solvent in which the polymer swells at conditions which permit the swelling solvent to diffuse into the glassy p...	08/16/1988
4761233	Novel membranes and process for making them A process for preparing a microporous membrane, which comprises casting the membrane from a solution comprising a mixture of at least one pore-forming polymer and at least one film-forming polymer, and a solvent for the mixture of polymers, wherein the at...	08/02/1988
4735721	Polyether-copolycarbonates for dialysis membranes The present invention is directed to a process for the preparation of a segmented, aliphatic-aromatic polyether-copolycarbonate containing structural units conforming to ##STR1## wherein --D-- is a diphenolate radical and units conforming to ##S...	04/05/1988
4715960	Method for the modification of polycarbonate membranes, the membranes produced by such method and their use Polycarbonate membranes are prepared for the selective separation of organic liquid mixtures, especially for the separation of ketone dewaxing solvents from dewaxed oil by preshrinking said membranes in presence of a class of solvents of solubility parame...	12/29/1987
4686044	Polycarbonate-polyether-copolymer membrane A method is provided for producing a membrane from polycarbonate-polyether-blockcopolymers with about 5 to 35 weight percent of repeating alkyleneethercarbonate units and about 95 to 65 weight percent of repeating bisphenol A-carbonate units, wherein the ...	08/11/1987
4629563	Asymmetric membranes 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 ti...	12/16/1986
4607070	Polyether-copolycarbonates for dialysis membranes The present invention is directed to a process for the preparation of a segmented, aliphatic-aromatic polyether-copolycarbonate containing structural units conforming to ##STR1## wherein --D-- is a diphenolate radical and units conforming to ##S...	08/19/1986
4432875	Semi-permeable membranes and processes for making the same Semi-permeable, porous membranes useful as filtration and reverse osmosis membranes can have or can consist of a porous layer of a hydrophobic polymer rendered hydrophilic at its surface by the presence of a surfactant containing both hydrophobic and hydr...	02/21/1984
4326958	Permselective membrane A permselective membrane is obtained by fabricating and crosslinking a methylolated vinylphenol polymer having repeat units having the formula ##STR1## wherein p, q and r are respectively 1 or 2; x and y are respectively selected so as to give a rati...	04/27/1982
4244824	Molded body with inclusions A molded polymer body with very fine, discrete, solid particles composed of a metal, metal compound or a mixture of the same incorporated within the molded body in a uniform pattern of distribution, substantially free of agglomeration, as obtained by a pr...	01/13/1981

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Class 210/500.4 - Carbonate