Patents by Inventor Joyce K. Nelson
Joyce K. Nelson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20200197835Abstract: A liquid hydrocarbon fuel containing dissolved oxygen is at least partially deoxygenated with a membrane device comprising a composite hollow fiber membrane that is comprised of an ultra-thin amorphous fluoropolymer layer superimposed on a porous PEEK polymer substrate.Type: ApplicationFiled: December 20, 2019Publication date: June 25, 2020Applicant: AIR LIQUIDE ADVANCED TECHNOLOGIES U.S. LLCInventors: Yong DING, Benjamin BIKSON, Joyce K. NELSON
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Publication number: 20200197834Abstract: A liquid hydrocarbon fuel containing dissolved oxygen is at least partially deoxygenated with a membrane device comprising a composite hollow fiber membrane that is comprised of an ultra-thin amorphous fluoropolymer layer superimposed on a porous PEEK polymer substrate.Type: ApplicationFiled: December 20, 2019Publication date: June 25, 2020Applicant: AIR LIQUIDE ADVANCED TECHNOLOGIES U.S. LLCInventors: Yong DING, Benjamin BIKSON, Joyce K. NELSON
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Patent number: 5443728Abstract: Improved fluid separation membranes are prepared from the blends of polyetherimide with phenylindane containing polyimides, wherein the amount of phenylindane containing polyimide in the blend is low. The present invention provides for highly anisotropic membranes particularly useful for gas separation applications and for preparation of composite membranes thereof.Type: GrantFiled: April 28, 1994Date of Patent: August 22, 1995Assignee: Praxair Technology, Inc.Inventors: James T. Macheras, Benjamin Bikson, Joyce K. Nelson
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Fluid separation composite membranes prepared from sulfonated aromatic polymers in lithium salt form
Patent number: 5364454Abstract: The present invention relates to fluid separation composite membranes prepared from sulfonated aromatic polymers in lithium salt form with sulfonic acid groups attached to aromatic rings that are incorporated into the main polymeric backbone.Type: GrantFiled: June 30, 1993Date of Patent: November 15, 1994Assignee: Praxair Technology, Inc.Inventors: Benjamin Bikson, Joyce K. Nelson -
Patent number: 5356459Abstract: Multilayer composite membranes are produced in a one-step coating process that provides an interior gas separation layer and an external defect sealing layer.Type: GrantFiled: June 30, 1993Date of Patent: October 18, 1994Assignee: Praxair Technology, Inc.Inventors: Benjamin Bikson, Joyce K. Nelson
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Patent number: 5348569Abstract: The present invention relates to composite membranes and membranes which are formed from modified poly(phenylene oxide) polymers having improved film forming properties and separation characteristics. The present invention further relates to poly(phenylene oxide) polymer and modified poly(phenylene oxide) polymer, having improved membrane forming characteristics and processes for producing the same.Type: GrantFiled: June 30, 1993Date of Patent: September 20, 1994Assignee: Praxair Technology, Inc.Inventors: Benjamin Bikson, Gertrud Gotz, Yurdagul Ozcayir, Joyce K. Nelson
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Patent number: 5181940Abstract: A process for producing highly asymmetric hollow fibers useful as permselective gas separation membranes and for producing composite membranes thereof by extruding the spinning dope through a tube-in-orifice spinneret into a gas-filled chamber maintained at reduced pressure and then conveying the extruded hollow fiber through a liquid bath to solidify the extrudate.Type: GrantFiled: August 1, 1991Date of Patent: January 26, 1993Assignee: Union Carbide Industrial Gases Technology CorporationInventors: Benjamin Bikson, James T. Macheras, Joyce K. Nelson
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Patent number: 5131927Abstract: This invention relates to methods for producing composite gas separation membranes by treating the gas separation layer of the composite membranes with a treating agent that ionically bonds to the gas separation membrane layer of the treated composite membrane. The invention also relates to the membranes produced and to gas separation processes utilizing the improved membranes.Type: GrantFiled: April 22, 1991Date of Patent: July 21, 1992Assignee: Union Carbide Industrial Gases Technology CorporationInventors: Benjamin Bikson, Joyce K. Nelson
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Patent number: 5071448Abstract: Semipermeable membranes comprised of certain sulfonated substituted polysulfone polymers containing the polymer repeat unit (A) or (B) as herein defined. The invention also pertains to processes for using said membranes for the selective permeation of at least one gaseous component from a mixture of gases containing said gaseous component in admixture with other gaseous components.Type: GrantFiled: December 5, 1990Date of Patent: December 10, 1991Assignee: Union Carbide Industrial Gases Technology CorporationInventors: Benjamin Bikson, Joyce K. Nelson, Gertrud Gotz, Yurdagul Ozcayir
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Patent number: 5067971Abstract: Process for the dehydration of gases using composite permeable membranes, preferably hollow fiber composite membranes comprised of a porous support coated with an ultrathin layer of a defined sulfonated polysulfone or sulfonated polyether ketone. The processes also contemplate the use of a sweep or purge gas on the water-enriched permeate side of the composite membrane to increase the efficiency of the dehydration process.Type: GrantFiled: November 6, 1990Date of Patent: November 26, 1991Assignee: Union Carbide Industrial Gases Technology CorporationInventors: Benjamin Bikson, Salvatore Giglia, Joyce K. Nelson
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Patent number: 5009678Abstract: Composite semi-permeable membranes comprised of an extremely thin layer of a sulfonated polysulfone polymer coated on a porous support are useful in processes for the selective permeation of ammonia from a mixture of gases containing the ammonia component in admixture with other gaseous components.Type: GrantFiled: October 31, 1989Date of Patent: April 23, 1991Assignee: Union Carbide Industrial Gases Technology CorporationInventors: Benjamin Bikson, Joyce K. Nelson, Jerry E. Perrin
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Patent number: 4990165Abstract: Composite membranes are prepared by depositing a separation layer on an asymmetric support layer. The separation layer has a selectivity equal to or greater than that of the material of the asymmetric support layer for a desired gas separation. The support layer is desirable produced in non-asymmetric form, and exposed to an elevated temperature approaching the glass transition temperature of the support layer material under non-swelling conditions to modify the structure thereof to create asymmetry therein, before or after the deposition of the separation layer, and to increase its compaction resistance and collapse pressure. Such desirable properties are conveniently achieved on a repeatable basis, enhancing the uniformity and reliability of the treated support layer and of composite membranes produced therefrom, for use in gas separation operations.Type: GrantFiled: September 27, 1989Date of Patent: February 5, 1991Assignee: Union Carbide Industrial Gases Technology CorporationInventors: Benjamin Bikson, James E. Miller, Joyce K. Nelson
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Patent number: 4981498Abstract: Process for the dehydration of gases using composite permeable membranes, preferably hollow fiber composite membranes comprised of a porous support coated with an ultrathin layer of a defined sulfonated polysulfone or sulfonated polyether ketone. The processes also contemplate the use of a sweep or purge gas on the water-enriched permeate side of the composite membrane to increase the efficiency of the dehydration process.Type: GrantFiled: February 12, 1990Date of Patent: January 1, 1991Assignee: Union Carbide Industrial Gases Technology CorporationInventors: Benjamin Bikson, Salvatore Giglia, Joyce K. Nelson
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Patent number: 4919865Abstract: 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 composite membrane. Processes for making these composite membranes and the methods of using them are also disclosed. The membranes are particularly useful in gas separation applications and are most suited for the separation of hydrogen from a hydrogen containing stream.Type: GrantFiled: November 5, 1987Date of Patent: April 24, 1990Assignee: Union Carbide Industrial Gases Technology CorporationInventor: Joyce K. Nelson
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Patent number: 4881954Abstract: Composite membranes are prepared by depositing a separation layer on an asymmetric support layer. The separation layer has a selectivity equal to or greater than that of the material of the asymmetric support layer for a desired gas separation. The support layer is desirably produced in non-asymmetric form, and exposed to an elevated temperature approaching the glass transition temperature of the support layer material under non-swelling conditions to modify the structure thereof to create asymmetry therein, before or after the deposition of the separation layer, and to increase its compaction resistance and collapse pressure. Such desirable properties are conveniently achieved on a repeatable basis, enhancing the uniformity and reliability of the treated support layer and of composite membranes produced therefrom, for use in gas separation operations.Type: GrantFiled: July 31, 1987Date of Patent: November 21, 1989Assignee: Union Carbide CorporationInventors: Benjamin Bikson, James E. Miller, Joyce K. Nelson
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Patent number: 4840819Abstract: Composite membranes having advantageous combinations of selectivity and permeability are prepared by the coating of a separation layer on a porous support layer containing a controlled amount of liquid in the range of from about 10% to about 90% by weight of the liquid present in the fully wet support layer.Type: GrantFiled: April 8, 1987Date of Patent: June 20, 1989Assignee: Union Carbide CorporationInventors: Samuel C. Williams, Benjamin Bikson, Joyce K. Nelson, Robert D. Burchesky
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Patent number: 4826599Abstract: A method for producing a composite hollow fiber membrane by coating a porous hollow fiber substrate with a dilute solution of a membrane-forming composition containing a membrane-forming material and a solvent therefor by contacting the porous hollow fiber substrate with the composition, partially evaporating some of the solvent from the coated porous hollow fiber substrate, contacting the partially dried coating porous hollow fiber substrate with a coagulant and recovering the composite hollow fiber membrane. Also included are the composite hollow fiber membranes so produced and their use as permeable membranes for separating at least one fluid from at least one other fluid in a fluid mixture.Type: GrantFiled: July 10, 1987Date of Patent: May 2, 1989Assignee: Union Carbide CorporationInventors: Benjamin Bikson, Joyce K. Nelson
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Patent number: 4822382Abstract: The present invention is directed to composite membranes having a separation layer comprised of at least one poly(tetramethyl) bisphenol A phthalate resulting in enhanced separation and permeating characteristics. Processes for making these composite membranes and the methods of using them for gas separations are also disclosed.Type: GrantFiled: November 2, 1987Date of Patent: April 18, 1989Assignee: Union Carbide CorporationInventor: Joyce K. Nelson