Patents by Inventor Rehan Zaki
Rehan Zaki 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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Patent number: 11291954Abstract: In some examples, a membrane module includes a fiber bundle. The fiber bundle includes a tubular first region and a tubular second region positioned around the tubular first region. One of the first or second regions includes hollow fibers oriented along an axis of the fiber bundle. Another of the first or second regions includes hollow fibers that are not colinear in a radial direction from the axis of the fiber bundle. A void fraction of the second region is different from a void fraction of the first region.Type: GrantFiled: May 4, 2020Date of Patent: April 5, 2022Assignee: Honeywell International Inc.Inventors: Jun Isobe, Phoebe Henson, Rebecca Kamire, Rehan Zaki, Stephen Yates
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Publication number: 20210339200Abstract: In some examples, a membrane module includes a fiber bundle. The fiber bundle includes a tubular first region and a tubular second region positioned around the tubular first region. One of the first or second regions includes hollow fibers oriented along an axis of the fiber bundle. Another of the first or second regions includes hollow fibers that are not colinear in a radial direction from the axis of the fiber bundle. A void fraction of the second region is different from a void fraction of the first region.Type: ApplicationFiled: May 4, 2020Publication date: November 4, 2021Inventors: Jun Isobe, Phoebe Henson, Rebecca Kamire, Rehan Zaki, Stephen Yates
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Patent number: 9186628Abstract: An air separation module includes a housing, a bundle of hollow fiber membranes, and a clam shell axial support assembly. The axial support assembly includes two supportive elements, each supportive element including a flow-through component. The flow-through component includes a plurality of openings through which a supply of fluid (e.g. oxygen enriched air) may pass. The axial support assembly is secured around the bundle of hollow fiber membranes at a position radially inward from the housing and radially outward from the fiber bundle.Type: GrantFiled: January 30, 2013Date of Patent: November 17, 2015Assignee: HONEYWELL INTERNATIONAL INC.Inventors: David A. Fautsch, Michael S. Sandacz, Steven M. Poklop, Rehan Zaki
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Patent number: 8016124Abstract: A gas separation membrane comprises a blend of polyethersulfone (PES) and aromatic polyimide polymers that may comprise a plurality of first repeating units of formula (I), wherein X1, X 2 and X3 are herein defined.Type: GrantFiled: April 22, 2009Date of Patent: September 13, 2011Assignee: Honeywell International Inc.Inventors: Stephen Yates, Rehan Zaki, Amber Arzadon, Chunqing Liu, Jeffrey Chiou
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Publication number: 20110146492Abstract: Hollow fiber membranes, such as those used in air separation modules, are generally made from solution spinning. Typically, solvent is present in the bore of the fiber for the spinning process. This solvent, in addition to the solvent already present in the polymer dope solution, may cause voids in the fiber material. By adding citric acid to the polymer dope material, these voids may be reduced or eliminated.Type: ApplicationFiled: December 18, 2009Publication date: June 23, 2011Applicant: HONEYWELL INTERNATIONAL INC.Inventors: MELISSA DOPKINS, ADAM GLEN THOMAS, CHUNQING LIU, REHAN ZAKI
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Patent number: 7905259Abstract: An onboard inert gas generation system includes an evaporator comprising a vessel that receives a hydrocarbon fuel from a fuel tank, separates vapor fuel components from liquid fuel components, establishes a nearly constant fuel vapor composition, and outputs the fuel vapor to be mixed with air prior to combusting the fuel vapor and air mixture in a catalytic reactor. Water is separated from the inert gas produced and the inert gas is introduced into the ullage space of the fuel tank to prevent or reduce possible hazardous conditions in the fuel tank.Type: GrantFiled: November 15, 2006Date of Patent: March 15, 2011Assignee: Honeywell International Inc.Inventors: Russell W. Johnson, Rehan Zaki, Stephen F. Yates
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Patent number: 7867319Abstract: A filled epoxy tubesheet comprises an epoxy filled with a metal, such as aluminum flakes. Embodiments of the filled epoxy tubesheets can bend due to stress on the surface rather than crack. Embodiments of the filled epoxy tubesheet can be used to improve Air Separation Module performance by reducing or eliminating leakage through crack in the tubesheet.Type: GrantFiled: April 1, 2008Date of Patent: January 11, 2011Assignee: Honeywell International Inc.Inventors: Rehan Zaki, Stephen Yates, Tihomir Tonev
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Publication number: 20100269698Abstract: A gas separation membrane comprises a blend of polyethersulfone (PES) and aromatic polyimide polymers that may comprise a plurality of first repeating units of formula (I), wherein X1, X 2 and X3 are herein defined.Type: ApplicationFiled: April 22, 2009Publication date: October 28, 2010Inventors: STEPHEN YATES, REHAN ZAKI, AMBER ARZADON, CHUNQING LIU, JEFFREY CHIOU
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Patent number: 7795538Abstract: Flexible insulated wires for use in a high temperature environment include a conductor and a coating over the conductor. The coating is formulated from a dielectric material and an organic binder having an organic component, wherein the organic component has been substantially decomposed from the coating during manufacture. The flexible insulated wire may be incorporated into a component.Type: GrantFiled: November 6, 2007Date of Patent: September 14, 2010Assignee: Honeywell International Inc.Inventors: Mark Kaiser, Devlin Gualtieri, Belinda S. Foor, Mariola Proszowski, Rehan Zaki
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Patent number: 7735670Abstract: A system and process to deplete or remove oxygen in the ullage of a fuel tank to reduce the oxygen/fuel vapor ratio below a lower explosion limit by exposing the ullage compounds to an oxygen removal catalyst active at a relatively low temperature. The oxygen removal catalyst may be a non-precious metal catalyst. A selective reaction of the oxygen by the catalyst forms primarily alcohols, aldehydes, and/or ketones and produces less than about 5% water by volume. The selective reaction, occurring at the relatively low temperature, reduces the risk of flammability of the fuel.Type: GrantFiled: October 17, 2006Date of Patent: June 15, 2010Assignee: Honeywell International Inc.Inventors: Rehan Zaki, Peter M. Michalakos
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Patent number: 7628965Abstract: A gas generating system comprises a catalytic reactor in fluid communication with a sulfur separator. The catalytic reactor oxidizes a fuel to provide a supply of carbon dioxide. The sulfur separator removes sulfur components from the stream before or after the fuel is oxidized. A portion of the hot exhaust gas from the catalytic reactor can be used to regenerate an adsorption bed of the sulfur separator.Type: GrantFiled: November 3, 2006Date of Patent: December 8, 2009Assignee: Honeywell International IncInventors: Russell Johnson, Stephen F. Yates, Rehan Zaki
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Publication number: 20090246429Abstract: A filled epoxy tubesheet comprises an epoxy filled with a metal, such as aluminum flakes. Embodiments of the filled epoxy tubesheets can bend due to stress on the surface rather than crack. Embodiments of the filled epoxy tubesheet can be used to improve Air Separation Module performance by reducing or eliminating leakage through crack in the tubesheet.Type: ApplicationFiled: April 1, 2008Publication date: October 1, 2009Inventors: Rehan Zaki, Stephen Yates, Tihomir Tonev
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Patent number: 7592284Abstract: A high capacity adsorbent may be used for enriching oxygen concentration in an air stream. Such a high capacity adsorbent may be from about 2 to about 3 times lighter relative to the currently available technology. Furthermore, the high capacity adsorbent is readily capable of regeneration after deactivation by water vapor. Unlike current available immobilization technology in which clay binder was used to bind 13X zeolite and additional 10% organic binder was used to immobilize beads, the adsorbents of the present invention may be made using just an organic binder, thereby reducing pore spoilage caused by the clay binder. Further unlike conventional adsorbents, which may use sodium as its cation, the adsorbent of the present invention uses a lithium cation, thereby resulting in enhanced nitrogen adsorption performance.Type: GrantFiled: March 13, 2006Date of Patent: September 22, 2009Assignee: Honeywell International Inc.Inventors: Rehan Zaki, Russ Johnson
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Publication number: 20090114416Abstract: Flexible insulated wires for use in a high temperature environment are provided. In an embodiment, the wire includes a conductor and a coating over the conductor. The coating is formulated from a dielectric material and an organic binder having an organic component, wherein the organic component has been substantially decomposed from the coating during manufacture. The flexible insulated wire may be incorporated into a component. Methods of forming the flexible insulated wire are also provided.Type: ApplicationFiled: November 6, 2007Publication date: May 7, 2009Applicant: Honeywell International, Inc.Inventors: Mark Kaiser, Devlin M. Gualtieri, Belinda S. Foor, Mariola Proszowski, Rehan Zaki
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Publication number: 20080128048Abstract: An onboard inert gas generation system includes an evaporator comprising a vessel that receives a hydrocarbon fuel from a fuel tank, separates vapor fuel components from liquid fuel components, establishes a nearly constant fuel vapor composition, and outputs the fuel vapor to be mixed with air prior to combusting the fuel vapor and air mixture in a catalytic reactor. Water is separated from the inert gas produced and the inert gas is introduced into the ullage space of the fuel tank to prevent or reduce possible hazardous conditions in the fuel tank.Type: ApplicationFiled: November 15, 2006Publication date: June 5, 2008Applicant: HONEYWELL INTERNATIONAL INC.Inventors: RUSSELL W. JOHNSON, REHAN ZAKI, STEPHEN F. YATES
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Publication number: 20080107571Abstract: A gas generating system comprises a catalytic reactor in fluid communication with a sulfur separator. The catalytic reactor oxidizes a fuel to provide a supply of carbon dioxide. The sulfur separator removes sulfur components from the stream before or after the fuel is oxidized. A portion of the hot exhaust gas from the catalytic reactor can be used to regenerate an adsorption bed of the sulfur separator.Type: ApplicationFiled: November 3, 2006Publication date: May 8, 2008Applicant: HONEYWELL INTERNATIONAL INC.Inventors: RUSSELL JOHNSON, STEPHEN F. YATES, REHAN ZAKI
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Publication number: 20080099618Abstract: A system and process is provided to deplete or remove oxygen in the ullage of a fuel tank to reduce the oxygen/fuel vapor ratio below a lower explosion limit by exposing the ullage compounds to an oxygen removal catalyst active at a relatively low temperature. The oxygen removal catalyst may be a non-precious metal catalyst. A selective reaction of the oxygen by the catalyst forms primarily alcohols, aldehydes, and/or ketones and produces less than about 5% water by volume. The selective reaction, occurring at the relatively low temperature, reduces the risk of flammability of the fuel.Type: ApplicationFiled: October 17, 2006Publication date: May 1, 2008Applicant: HONEYWELL INTERNATIONAL INC.Inventors: REHAN ZAKI, PETER M. MICHALAKOS
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Publication number: 20070209509Abstract: A high capacity adsorbent may be used for enriching oxygen concentration in an air stream. Such a high capacity adsorbent may be from about 2 to about 3 times lighter relative to the currently available technology. Furthermore, the high capacity adsorbent is readily capable of regeneration after deactivation by water vapor. Unlike current available immobilization technology in which clay binder was used to bind 13X zeolite and additional 10% organic binder was used to immobilize beads, the adsorbents of the present invention may be made using just an organic binder, thereby reducing pore spoilage caused by the clay binder. Further unlike conventional adsorbents, which may use sodium as its cation, the adsorbent of the present invention uses a lithium cation, thereby resulting in enhanced nitrogen adsorption performance.Type: ApplicationFiled: March 13, 2006Publication date: September 13, 2007Inventors: Rehan Zaki, Russ Johnson