Patents by Inventor Hyungsoo Choi
Hyungsoo Choi 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: 20240038870Abstract: A solution-phase processed vertical Schottky diode comprises a stack of films on a substrate, where the stack of films includes: a first electrode film comprising a noble metal; a first semiconducting film on the first electrode film, where the first semiconducting film comprises zinc oxide doped with an electron donor metal at a first dopant concentration; a second semiconducting film on the first semiconducting film, where the second semiconducting film comprises zinc oxide doped with the electron donor metal at a second dopant concentration higher than the first dopant concentration; and a second electrode film on the second semiconducting film, where the second electrode film comprises a noble metal.Type: ApplicationFiled: July 28, 2023Publication date: February 1, 2024Inventors: Kyekyoon KIM, Hyungsoo CHOI, Riley VESTO
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Patent number: 11471419Abstract: Provided is a microcapsule for increasing the survival and/or function of a cell, such as an islet cell, microcapsule can include an outer shell comprising a first polymer; an interior core comprising: at least one live cell; a second polymer; and at least one microsphere comprising a third polymer and a compound capable of improving survival of the at least one cell. The improved survival and/or function of the at least one live cell in the microcapsule is compared to a live cell in a microcapsule in the absence of the compound capable of improving survival of the at least one cell. The first and second polymer may include alginate and the third polymer (used for the microsphere) may comprise PLGA. The compound may include a GLP-1 receptor agonist. Also provided are methods for producing such microcapsules; insulin delivery systems using the microcapsules, and methods to treat disease, such as diabetes, using the microcapsules.Type: GrantFiled: September 29, 2017Date of Patent: October 18, 2022Assignee: The Board of Trustees of the University of IllinoisInventors: Kyekyoon Kim, Hyungsoo Choi
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Publication number: 20210322326Abstract: Particles for delivery of therapeutic agents are disclosed. In one embodiment, a particle for delivery of a therapeutic agent includes a hydrogel polymer matrix, a plurality of hydrophobic encapsulation sites within the hydrogel polymer matrix, and a hydrophobic therapeutic agent encapsulated within at least some of the encapsulation sites. The hydrogel polymer matrix may be hydrophilic. The hydrophobic encapsulation sites may comprise cyclodextrin conjugated to the hydrogel polymer matrix. The hydrogel polymer matrix comprises gelatin. The particle may have a diameter of 10 nm to 50 ?m.Type: ApplicationFiled: April 16, 2021Publication date: October 21, 2021Inventors: Hyungsoo CHOI, Kyekyoon KIM
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Publication number: 20180092855Abstract: Provided is a microcapsule for increasing the survival and/or function of a cell, such as an islet cell, microcapsule can include an outer shell comprising a first polymer; an interior core comprising: at least one live cell; a second polymer; and at least one microsphere comprising a third polymer and a compound capable of improving survival of the at least one cell. The improved survival and/or function of the at least one live cell in the microcapsule is compared to a live cell in a microcapsule in the absence of the compound capable of improving survival of the at least one cell. The first and second polymer may include alginate and the third polymer (used for the microsphere) may comprise PLGA. The compound may include a GLP-1 receptor agonist. Also provided are methods for producing such microcapsules; insulin delivery systems using the microcapsules, and methods to treat disease, such as diabetes, using the microcapsules.Type: ApplicationFiled: September 29, 2017Publication date: April 5, 2018Inventors: Kyekyoon Kim, Hyungsoo Choi
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Publication number: 20180070586Abstract: Provided is a lyoprotected microcapsule for increasing the survival of a microorganism, such as Pantoea agglomerans E325, after lyophilization and/or storage, which includes an interior core having at least one live microorganism; a first polymer; and at least one nutrient, as well as an exterior shell having second polymer. The lyoprotected microcapsule also includes at least one lyoprotective agent. The polymer may include alginate and the lyoprotective agent may include maltodextrin, trehalose and combinations thereof. Microorganisms within the lyoprotected microcapsules exhibit enhanced survival after lyophilization and/or storage. Also provided are methods for producing such lyoprotected microcapsules and methods for using the lyoprotected microcapsules.Type: ApplicationFiled: August 18, 2017Publication date: March 15, 2018Applicant: The Board of Trustees of the University of IllinoisInventors: Kyekyoon KIM, Hyungsoo CHOI, In-Yong KIM
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Patent number: 8663511Abstract: A system that incorporates teachings of the present disclosure may include, for example, a method for applying a force to at least one of an inner stream, an outer stream or both of a combined stream to produce a plurality of capsules, receiving image data, processing the image data, detecting undesirable capsules from the processed image data, applying a bias charge only to the detected undesirable capsules, and segregating the biased undesirable capsules from the unbiased desirable capsules. Additional embodiments are disclosed.Type: GrantFiled: September 24, 2012Date of Patent: March 4, 2014Assignee: The Board of Trustees of the University of IllinoisInventors: Kyekyoon Kim, Hyungsoo Choi
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Patent number: 8507048Abstract: The subject disclosure provides a method for applying dissimilar electrical charges to portions of a plurality of applicators by way of a conductor included in a conduit of each applicator. The method further includes causing each applicator to generate one or more jet sprays of a liquid received by each applicator for application of a material on a substrate, where one or more portions of the material on the substrate have one or more net charges associated with the dissimilar electrical charges applied to the portions of the plurality of applicators, where the conductor of each applicator is a sleeve positioned in the applicator, and where a diameter of the sleeve results in one of an outer surface of the sleeve contacting a surface of the conduit, or the outer surface of the sleeve having a separation from the surface of the conduit of the applicator. Additional embodiments are disclosed.Type: GrantFiled: August 26, 2011Date of Patent: August 13, 2013Assignee: The Board of Trustees of the University of IllinoisInventors: Kyekyoon Kim, Hyungsoo Choi
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Patent number: 8469762Abstract: A high intensity discharge arc lamp comprises an arc tube, a metal halide in the arc tube, and a coating on the arc tube. The coating comprises a UV absorbent material.Type: GrantFiled: May 22, 2008Date of Patent: June 25, 2013Assignee: The Board of Trustees of the University of IllinoisInventors: Kyekyoon Kim, Ju Gao, Hyungsoo Choi, Ravindra Pratap Singh
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Patent number: 8409621Abstract: A method of forming particles, comprises accelerating a first stream comprising a first liquid, applying a charging voltage of at most 1.5 kV to the first stream, and vibrating the first stream, to form particles.Type: GrantFiled: November 13, 2007Date of Patent: April 2, 2013Assignee: The Board of Trustees of the University of IllinoisInventors: Kyekyoon Kim, Hyungsoo Choi, Young Bin Choy
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Patent number: 8342120Abstract: A system that incorporates teachings of the present disclosure may include, for example, an apparatus having a tube with an ingress opening to receive a liquid, and an egress opening to release the liquid, a conductor positioned in a conduit of the tube, the conductor and the conduit having dimensions to cause a surface tension of the liquid to prevent a constant flow of the liquid from the egress opening, and a power supply coupled to the conductor to apply a charge to the liquid to overcome the surface tension and form at the egress opening a single jet stream of the liquid applicable on a substrate to create a pattern. The single jet stream can be controllable in part by a viscosity of the liquid. Additional embodiments are disclosed.Type: GrantFiled: March 16, 2009Date of Patent: January 1, 2013Assignee: The Board of Trustees of the University of IllinoisInventors: Kyekyoon Kim, Hyungsoo Choi, Philip Edward Heil, III
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Patent number: 8293271Abstract: A system that incorporates teachings of the present disclosure may include, for example, an apparatus having an outer nozzle operable to discharge an outer stream of a shell solution, and an inner nozzle operable to discharge an inner stream of a core solution intermixed with a plurality of materials. The outer stream can substantially surrounds the inner stream, thereby forming a combined stream. A plurality of capsules can be formed responsive to a force applied to the combined stream. At least a portion of the plurality of capsules are desirable capsules, each having a core encapsulated by a portion of the shell solution. The core can have at least one of the plurality of materials encapsulated by a portion of the core solution without protruding an outer surface of the portion of the shell solution. Additional embodiments are disclosed.Type: GrantFiled: June 9, 2009Date of Patent: October 23, 2012Assignee: The Board of Trustees of The University of IllinoisInventors: Kyekyoon Kim, Hyungsoo Choi
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Publication number: 20110311731Abstract: A system that incorporates teachings of the present disclosure may include, for example, an apparatus having a plurality of applicators, each applicator with an ingress opening to receive a liquid, and an egress opening to release the liquid, and a conductor positioned in a conduit of each of the plurality of applicators, the conductor and the conduit having dimensions to cause a surface tension of the liquid to prevent a constant flow of the liquid from the egress opening. Each conductor of the plurality of applicators can be coupled to one of one or more power sources operable to apply a charge to the liquid to overcome the surface tension and form at the egress opening of each applicator a plurality of jet sprays of the liquid applicable on a substrate to form a thin film. Additional embodiments are disclosed.Type: ApplicationFiled: August 26, 2011Publication date: December 22, 2011Applicant: THE BOARD OF TRUSTEES OF THE UNIVIERSITY OF ILLINOISInventors: KYEKYOON KIM, Hyungsoo Choi
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Patent number: 8030833Abstract: One embodiment includes forming a nanowire on a substrate from an organometallic vapor. The nanowire is grown during this formation in a direction away from the substrate and is freestanding during growth. The nanowire has a first dimension of 500 nanometers or less and a second dimension extending from the substrate to a free end of the nanowire at least 10 times greater than the first dimension. In one form, the organometallic vapor includes copper, silver, or gold. Alternatively or additionally, the nanowire is of a monocrystalline structure.Type: GrantFiled: February 13, 2008Date of Patent: October 4, 2011Assignee: The Board of Trustees of the University of IllinoisInventors: Hyungsoo Choi, Kyekyoon Kim
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Patent number: 8025025Abstract: A system that incorporates teachings of the present disclosure may include, for example, an apparatus having a plurality of applicators, each applicator with an ingress opening to receive a liquid, and an egress opening to release the liquid, and a conductor positioned in a conduit of each of the plurality of applicators, the conductor and the conduit having dimensions to cause a surface tension of the liquid to prevent a constant flow of the liquid from the egress opening. Each conductor of the plurality of applicators can be coupled to one of one or more power sources operable to apply a charge to the liquid to overcome the surface tension and form at the egress opening of each applicator a plurality of jet sprays of the liquid applicable on a substrate to form a thin film. Additional embodiments are disclosed.Type: GrantFiled: April 10, 2009Date of Patent: September 27, 2011Assignee: The Board of Trustees of the University of IllinoisInventors: Kyekyoon Kim, Hyungsoo Choi
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Publication number: 20100301730Abstract: A high intensity discharge arc lamp comprises an arc tube, a metal halide in the arc tube, and a coating on the arc tube. The coating comprises a UV absorbent material.Type: ApplicationFiled: May 22, 2008Publication date: December 2, 2010Applicant: The Board of Trustees of the University of IllinoisInventors: Kyekyoon Kim, Ju Gao, Hyungsoo Choi, Ravindra P. Singh
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Publication number: 20100291408Abstract: One embodiment includes non-catalyticly forming a nanowire on a substrate from an organometallic vapor without application of any type of reduction agent. The nanowire is grown during this formation in a direction away from the substrate and is freestanding during growth. The nanowire has a first dimension of 500 nanometers or less and a second dimension extending from the substrate to a free end of the nanowire at least 10 times greater than the first dimension. In one form, the organometallic vapor includes copper and the nanowire essentially consists of elemental copper, a copper alloy, or oxide of copper. Alternatively or additionally, the nanowire is of a monocrystalline structure.Type: ApplicationFiled: January 18, 2008Publication date: November 18, 2010Inventor: Hyungsoo Choi
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Publication number: 20090304788Abstract: A system that incorporates teachings of the present disclosure may include, for example, an apparatus having an outer nozzle operable to discharge an outer stream of a shell solution, and an inner nozzle operable to discharge an inner stream of a core solution intermixed with a plurality of materials. The outer stream can substantially surrounds the inner stream, thereby forming a combined stream. A plurality of capsules can be formed responsive to a force applied to the combined stream. At least a portion of the plurality of capsules are desirable capsules, each having a core encapsulated by a portion of the shell solution. The core can have at least one of the plurality of materials encapsulated by a portion of the core solution without protruding an outer surface of the portion of the shell solution. Additional embodiments are disclosed.Type: ApplicationFiled: June 9, 2009Publication date: December 10, 2009Applicant: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOISInventors: Kyekyoon Kim, Hyungsoo Choi
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Publication number: 20090258153Abstract: A system that incorporates teachings of the present disclosure may include, for example, an apparatus having a plurality of applicators, each applicator with an ingress opening to receive a liquid, and an egress opening to release the liquid, and a conductor positioned in a conduit of each of the plurality of applicators, the conductor and the conduit having dimensions to cause a surface tension of the liquid to prevent a constant flow of the liquid from the egress opening. Each conductor of the plurality of applicators can be coupled to one of one or more power sources operable to apply a charge to the liquid to overcome the surface tension and form at the egress opening of each applicator a plurality of jet sprays of the liquid applicable on a substrate to form a thin film. Additional embodiments are disclosed.Type: ApplicationFiled: April 10, 2009Publication date: October 15, 2009Applicant: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOISInventors: KYEKYOON KIM, HYUNGSOO CHOI
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Publication number: 20090230222Abstract: A system that incorporates teachings of the present disclosure may include, for example, an apparatus having a tube with an ingress opening to receive a liquid, and an egress opening to release the liquid, a conductor positioned in a conduit of the tube, the conductor and the conduit having dimensions to cause a surface tension of the liquid to prevent a constant flow of the liquid from the egress opening, and a power supply coupled to the conductor to apply a charge to the liquid to overcome the surface tension and form at the egress opening a single jet stream of the liquid applicable on a substrate to create a pattern. The single jet stream can be controllable in part by a viscosity of the liquid. Additional embodiments are disclosed.Type: ApplicationFiled: March 16, 2009Publication date: September 17, 2009Applicant: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOISInventors: KYEKYOON KIM, Hyungsoo Choi, Philip Edward Heil
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Patent number: 7507390Abstract: Disclosed are organometallic compounds derived from Groups VIIb, VIII, IX, and X metals useful as precursors for the formation of metal containing powders and for the chemical deposition of the metals on substrates, particularly for the chemical vapor deposition of metal films suitable for the manufacture of electronic devices. Methods for their use are also disclosed.Type: GrantFiled: April 19, 2004Date of Patent: March 24, 2009Assignee: Board of Trustees, The University of IllinoisInventor: Hyungsoo Choi