Patents by Inventor Vinh Q. Nguyen
Vinh Q. Nguyen 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: 20240066834Abstract: A bonded optical assembly comprising infrared-transparent materials. The assembly comprises two or more infrared transparent optical elements and a polymer comprising at least one chalcogenide element and crosslinking moieties between the infrared-transparent optical elements. The crosslinking moieties may be organic, inorganic, or both.Type: ApplicationFiled: November 7, 2023Publication date: February 29, 2024Inventors: Darryl A. Boyd, Jason D. Myers, Vinh Q. Nguyen, Daniel J. Gibson, Colin C. Baker, Woohong Kim, Jasbinder S. Sanghera
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Publication number: 20240053761Abstract: The present invention pertains to a system method for using depth sensors on the fore, aft and bottom sides of a legged robot for stair climbing. The method uses real-time depth information to help with a legged robot's navigation on a variety of leveled terrains. Sensing methods are employed in addition to generating a composite field of view stretching from the front to the back of the legged robot. Downward facing depth cameras positioned at a particular angle enable the system to guide a legged robot over an environment which is being navigated by offering a persistent view of the environment. Other tools such as heightmap filling gradient map calculation, and strategic foothold selection are also implemented.Type: ApplicationFiled: August 8, 2023Publication date: February 15, 2024Inventors: Gavin Kenneally, Vinh Q. Nguyen, Thomas Turner Topping, Avik De
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Patent number: 11827008Abstract: A method for bonding infrared transparent materials by placing a polymer comprising at least one chalcogenide element and crosslinking moieties between infrared-transparent optical elements and applying heat, pressure, or both. The crosslinking moieties may be organic, inorganic, or both. Also disclosed is the related bonded assembly comprising infrared transparent optical elements.Type: GrantFiled: December 3, 2020Date of Patent: November 28, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Darryl A. Boyd, Jason D. Myers, Vinh Q. Nguyen, Daniel J. Gibson, Colin C. Baker, Woohong Kim, Jasbinder S. Sanghera
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Patent number: 11731896Abstract: The present invention provides for synthesizing high optical quality multicomponent chalcogenide glasses without refractive index perturbations due to striae, phase separation or crystal formation using a two-zone furnace and multiple fining steps. The top and bottom zones are initially heated to the same temperature, and then a temperature gradient is created between the top zone and the bottom zone. The fining and cooling phase is divided into multiple steps with multiple temperature holds.Type: GrantFiled: April 27, 2021Date of Patent: August 22, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Vinh Q. Nguyen, Mikhail Kotov, Daniel J. Gibson, Shyam S. Bayya, Jasbinder S. Sanghera, Gryphon A. Drake
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Patent number: 11649195Abstract: There is provided a nitrogen fertilizer granule in which the nitrogen release can be timed and the nitrogen release rate can be controlled according to the needs of the plants to be fertilized. The smart release nitrogen-containing fertilizer granule comprises a nitrogen-containing fertilizer core; an organic functional layer covering the core, wherein the organic functional layer comprises at least one functional organic compound that is an enzyme inhibitor, a microbial suppressor, a phosphorus solubilizer, and/or a plant hormone; a controlled release layer covering the organic functional layer, wherein the controlled release layer comprises water-swellable copolymeric nanoparticles; and an anticaking layer covering the controlled release layer, wherein the anticaking layer comprises water-insoluble copolymeric nanoparticles.Type: GrantFiled: February 6, 2019Date of Patent: May 16, 2023Assignee: RYNAN TECHNOLOGIES PTE LTD.Inventors: My T. Nguyen, Hoa V. Tran, Man M. Ly, Van T. Kim, Nhien H. Le, Na Thach, Sony T. Vo, Vinh Q. Nguyen
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Patent number: 11591275Abstract: There is provided a smart release potash fertilizer granule comprising a potash core; an extended release layer covering the potash core, wherein the extended release layer comprises water-swellable copolymeric nanoparticles and at least one water-soluble organic acid or water-soluble organic carboxylate salt; a controlled release layer covering the extended release layer, wherein the controlled release layer comprises water-swellable copolymeric nanoparticles; and an anticaking layer covering the controlled release layer, wherein the anticaking layer comprises water-insoluble copolymeric nanoparticles.Type: GrantFiled: February 6, 2019Date of Patent: February 28, 2023Assignee: RYNAN TECHNOLOGIES PTE LTDInventors: My T. Nguyen, Hoa V. Tran, Man M. Ly, Van T. Kim, Nhien H. Le, Na Thach, Sony T. Vo, Vinh Q. Nguyen
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Publication number: 20220332918Abstract: A polymer comprising one or more chalcogenide elements and one or more crosslinking moieties. The crosslinking moieties may be organic, inorganic, or both. Also disclosed is the related method for making a polymer comprising purifying a chalcogenide polymer powder comprising one or more chalcogenide elements, melting the purified chalcogenide polymer powder, adding one or more crosslinking moieties to the melted chalcogenide polymer, and curing the modified chalcogenide polymer at a temperature between 150 and 200° C.Type: ApplicationFiled: June 30, 2022Publication date: October 20, 2022Inventors: Darryl A. Boyd, Vinh Q. Nguyen, Nia A. Pollard, Frederic H. Kung, Daniel J. Gibson, Jason D. Myers, Colin C. Baker, Woohong Kim, Jasbinder S. Sanghera
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Publication number: 20220100009Abstract: Tunable devices and methods for fine tuning the optical responses of thin film devices post fabrication are described. This approach modifies the refractive indices of the chalcogenide glass thin films incorporated into the devices, and using this change in the refractive indices to fine tune the optical responses of the devices. Thermal annealing may be used to modify the refractive index. Thermal annealing provides good uniformity in large-area devices and may be applied to multi-layer structures.Type: ApplicationFiled: September 29, 2021Publication date: March 31, 2022Inventors: Jesse Frantz, Jason Myers, Vinh Q. Nguyen, Jasbinder Sanghera, Robel Bekele, Anthony Romano Clabeau
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Publication number: 20210363073Abstract: There is provided a nitrogen fertilizer granule in which the nitrogen release can be timed and the nitrogen release rate can be controlled according to the needs of the plants to be fertilized. The smart release nitrogen-containing fertilizer granule comprises a nitrogen-containing fertilizer core; an organic functional layer covering the core, wherein the organic functional layer comprises at least one functional organic compound that is an enzyme inhibitor, a microbial suppressor, a phosphorus solubilizer, and/or a plant hormone; a controlled release layer covering the organic functional layer, wherein the controlled release layer comprises water-swellable copolymeric nanoparticles; and an anticaking layer covering the controlled release layer, wherein the anticaking layer comprises water-insoluble copolymeric nanoparticles.Type: ApplicationFiled: February 6, 2019Publication date: November 25, 2021Applicant: RYNAN TECHNOLOGIES PTE. LTD.Inventors: My T. NGUYEN, Hoa V. TRAN, Man M. LY, Van T. KIM, Nhien H. LE, Na THACH, Sony T. VO, Vinh Q. NGUYEN
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Publication number: 20210246066Abstract: The present invention provides for synthesizing high optical quality multicomponent chalcogenide glasses without refractive index perturbations due to striae, phase separation or crystal formation using a two-zone furnace and multiple fining steps. The top and bottom zones are initially heated to the same temperature, and then a temperature gradient is created between the top zone and the bottom zone. The fining and cooling phase is divided into multiple steps with multiple temperature holds.Type: ApplicationFiled: April 27, 2021Publication date: August 12, 2021Inventors: Vinh Q. Nguyen, Mikhail Kotov, Daniel J. Gibson, Shyam S. Bayya, Jasbinder S. Sanghera, Gryphon A. Drake
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Publication number: 20210230040Abstract: A high optical quality multicomponent chalcogenide glasses without refractive index perturbations due to striae, phase separation or crystal formation made using a sealed ampoule with chemical components enclosed inside, a two-zone furnace, a convection heating/mixing step, and multiple fining steps. Initially, the sealed ampoule is oriented vertically within the two-zone furnace and heated to melt the chemical components contained within, and a temperature gradient is created between the top zone and the bottom zone such that the bottom zone has a higher temperature. This temperature gradient causes convection currents within the viscous liquid until it is sufficiently mixed due to the convective flow. Then the temperature gradient is reversed such that the top zone now has a higher temperature and the convective flow ceases. The furnace temperatures are then reduced over a period of time, with holds at multiple temperatures for fining and cooling to form a solid glass.Type: ApplicationFiled: April 12, 2021Publication date: July 29, 2021Inventors: Vinh Q. Nguyen, Jasbinder S. Sanghera, Daniel J. Gibson, Mikhail Kotov, Gryphon A. Drake, Shyam S. Bayya
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Publication number: 20210162709Abstract: A method for bonding infrared transparent materials by placing a polymer comprising at least one chalcogenide element and crosslinking moieties between infrared-transparent optical elements and applying heat, pressure, or both. The crosslinking moieties may be organic, inorganic, or both. Also disclosed is the related bonded assembly comprising infrared transparent optical elements.Type: ApplicationFiled: December 3, 2020Publication date: June 3, 2021Inventors: Darryl A. Boyd, Jason D. Myers, Vinh Q. Nguyen, Danial J. Gibson, Colin C. Baker, Woohong Kim, Jasbinder S. Sanghera
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Publication number: 20210139388Abstract: There is provided a smart release potash fertilizer granule comprising a potash core; an extended release layer covering the potash core, wherein the extended release layer comprises water-swellable copolymeric nanoparticles and at least one water-soluble organic acid or water-soluble organic carboxylate salt; a controlled release layer covering the extended release layer, wherein the controlled release layer comprises water-swellable copolymeric nanoparticles; and an anticaking layer covering the controlled release layer, wherein the anticaking layer comprises water-insoluble copolymeric nanoparticles.Type: ApplicationFiled: February 6, 2019Publication date: May 13, 2021Inventors: My T. NGUYEN, Hoa V. TRAN, Man M. LY, Van T. KIM, Nhien H. LE, Na THACH, Sony T. VO, Vinh Q. NGUYEN
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Patent number: 10988407Abstract: The present invention provides for synthesizing high optical quality multicomponent chalcogenide glasses without refractive index perturbations due to striae, phase separation or crystal formation using a two-zone furnace and multiple fining steps. The top and bottom zones are initially heated to the same temperature, and then a temperature gradient is created between the top zone and the bottom zone. The fining and cooling phase is divided into multiple steps with multiple temperature holds.Type: GrantFiled: November 9, 2018Date of Patent: April 27, 2021Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Vinh Q. Nguyen, Mikhail Kotov, Daniel J. Gibson, Shyam S. Bayya, Jasbinder S. Sanghera, Gryphon A. Drake
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Patent number: 10974984Abstract: A method for making high optical quality multicomponent chalcogenide glasses without refractive index perturbations due to striae, phase separation or crystal formation using a sealed ampoule with chemical components enclosed inside, a two-zone furnace, a convection heating/mixing step, and multiple fining steps. Initially, the sealed ampoule is oriented vertically within the two-zone furnace and heated to melt the chemical components contained within, and a temperature gradient is created between the top zone and the bottom zone such that the bottom zone has a higher temperature. This temperature gradient causes convection currents within the viscous liquid until it is sufficiently mixed due to the convective flow. Then the temperature gradient is reversed such that the top zone now has a higher temperature and the convective flow ceases. The furnace temperatures are then reduced over a period of time, with holds at multiple temperatures for fining and cooling to form a solid glass.Type: GrantFiled: December 20, 2018Date of Patent: April 13, 2021Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Vinh Q. Nguyen, Jasbinder S. Sanghera, Daniel J. Gibson, Mikhail Kotov, Gryphon A. Drake, Shyam S. Bayya
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Publication number: 20190311889Abstract: A method for forming a high purity, copper indium gallium selenide (CIGS) sputtering target is disclosed. The method includes sealing precursor materials for forming the bulk material in a reaction vessel. The precursor materials include copper, at least one chalcogen selected from selenium, sulfur, and tellurium, and at least one element from group IIIA of the periodic table, which may be selected from gallium, indium, and aluminum. The sealed reaction vessel is heated to a temperature at which the precursor materials react to form the bulk material. The bulk material is cooled in the vessel to a temperature below the solidification temperature of the bulk material and opened to release the formed bulk material. A sputtering target formed by the method can have an oxygen content of 10 ppm by weight, or less.Type: ApplicationFiled: May 22, 2019Publication date: October 10, 2019Inventors: Vinh Q. Nguyen, Jesse A. Frantz, Jasbinder S. Sanghera, Ishwar D. Aggarwal, Allan J. Bruce, Michael Cyrus, Sergey V. Frolov
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Patent number: 10347473Abstract: A method for forming a high purity, copper indium gallium selenide (CIGS) bulk material is disclosed. The method includes sealing precursor materials for forming the bulk material in a reaction vessel. The precursor materials include copper, at least one chalcogen selected from selenium, sulfur, and tellurium, and at least one element from group IIIA of the periodic table, which may be selected from gallium, indium, and aluminum. The sealed reaction vessel is heated to a temperature at which the precursor materials react to form the bulk material. The bulk material is cooled in the vessel to a temperature below the solidification temperature of the bulk material and opened to release the formed bulk material. A sputtering target formed by the method can have an oxygen content of 10 ppm by weight, or less.Type: GrantFiled: September 17, 2010Date of Patent: July 9, 2019Assignees: The United States of America, as represented by the Secretary of the Navy, Sunlight Photonics Inc.Inventors: Vinh Q Nguyen, Jesse A. Frantz, Jasbinder S. Sanghera, Ishwar D. Aggarwal, Allan J. Bruce, Michael Cyrus, Sergey V. Frolov
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Publication number: 20190194052Abstract: A method for making high optical quality multicomponent chalcogenide glasses without refractive index perturbations due to striae, phase separation or crystal formation using a sealed ampoule with chemical components enclosed inside, a two-zone furnace, a convection heating/mixing step, and multiple fining steps. Initially, the sealed ampoule is oriented vertically within the two-zone furnace and heated to melt the chemical components contained within, and a temperature gradient is created between the top zone and the bottom zone such that the bottom zone has a higher temperature. This temperature gradient causes convection currents within the viscous liquid until it is sufficiently mixed due to the convective flow. Then the temperature gradient is reversed such that the top zone now has a higher temperature and the convective flow ceases. The furnace temperatures are then reduced over a period of time, with holds at multiple temperatures for fining and cooling to form a solid glass.Type: ApplicationFiled: December 20, 2018Publication date: June 27, 2019Inventors: Vinh Q. Nguyen, Jasbinder S. Sanghera, Daniel J. Gibson, Mikhail Kotov, Gryphon A. Drake, Shyam S. Bayya
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Publication number: 20190077698Abstract: The present invention provides for synthesizing high optical quality multicomponent chalcogenide glasses without refractive index perturbations due to striae, phase separation or crystal formation using a two-zone furnace and multiple fining steps. The top and bottom zones are initially heated to the same temperature, and then a temperature gradient is created between the top zone and the bottom zone. The fining and cooling phase is divided into multiple steps with multiple temperature holds.Type: ApplicationFiled: November 9, 2018Publication date: March 14, 2019Inventors: Vinh Q. Nguyen, Mikhail Kotov, Daniel J. Gibson, Shyam S. Bayya, Jasbinder S. Sanghera, Gryphon A. Drake
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Patent number: 10133039Abstract: A method for making a gradient index infrared transmitting optic by thermally treating a preform, where the preform comprises two or more infrared transmitting glasses having different compositions and optical properties, where there is an interface between adjacent glasses, where during the thermal treatment one or more chemical elements from the glasses diffuses through one or more interface resulting in a diffused gradient index optical element comprising a gradient in the chemical element concentration, and where the optical element has a gradient in refractive index and dispersion. Also disclosed is the related infrared transmitting optical element made by this method.Type: GrantFiled: March 14, 2014Date of Patent: November 20, 2018Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Daniel J. Gibson, Mikhail Kotov, Geoff Chin, Shyam S. Bayya, Jasbinder S. Sanghera, Vinh Q. Nguyen