Patents by Inventor Chand K. Jotshi
Chand K. Jotshi 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: 20230365849Abstract: In one embodiment, a phase change material is encapsulated by forming a phase change material pellet, coating the pellet with flexible material, heating the coated pellet to melt the phase change material, wherein the phase change materials expands and air within the pellet diffuses out through the flexible material, and cooling the coated pellet to solidify the phase change material.Type: ApplicationFiled: July 11, 2023Publication date: November 16, 2023Inventors: Jaspreet Dhau, D. Yogi Goswami, Chand K. Jotshi, Elias K. Stefanakos
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Patent number: 11732171Abstract: In one embodiment, a metal-plated polymer object includes a polymer surface, a first metal layer that has been applied to the polymer surface to render it electrically conductive, and a second metal layer that has been deposited on the first metal layer.Type: GrantFiled: December 10, 2019Date of Patent: August 22, 2023Assignee: UNIVERSITY OF SOUTH FLORIDAInventors: Jaspreet Dhau, D. Yogi Goswami, Chand K. Jotshi, Elias K. Stefanakos
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Publication number: 20200172784Abstract: In one embodiment, a metal-plated polymer object includes a polymer surface, a first metal layer that has been applied to the polymer surface to render it electrically conductive, and a second metal layer that has been deposited on the first metal layer.Type: ApplicationFiled: December 10, 2019Publication date: June 4, 2020Applicant: University of South FloridaInventors: Jaspreet Dhau, D. Yogi Goswami, Chand K. Jotshi, Elias K. Stefanakos
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Patent number: 10501668Abstract: In one embodiment, a method for depositing metal on a polymer surface, the method includes coating the polymer surface with a binding metal to render the polymer surface solvophillic and/or hydrophilic and depositing a further metal on the binding metal-coated polymer surface.Type: GrantFiled: August 22, 2017Date of Patent: December 10, 2019Assignee: University of South FloridaInventors: Jaspreet Dhau, D. Yogi Goswami, Chand K. Jotshi, Elias K. Stefanakos
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Patent number: 10494555Abstract: In one embodiment, a method for fabricating a ceramic phase change material capsule includes forming a solid phase change material pellet, coating the pellet with a green ceramic material, and sintering the green ceramic material while on the pellet to form a ceramic outer shell of the capsule.Type: GrantFiled: January 5, 2018Date of Patent: December 3, 2019Assignee: University of South FloridaInventors: Dharendra Yogi Goswami, Elias K. Stefanakos, Chand K. Jotshi, Jaspreet Dhau
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Patent number: 9879166Abstract: In one embodiment, a method for fabricating a ceramic phase change material capsule includes forming a hollow ceramic capsule body having a filling hole, filling the ceramic capsule body with one or more phase change materials via the filling hole, and closing and sealing the filling hole.Type: GrantFiled: June 16, 2015Date of Patent: January 30, 2018Assignee: University of South FloridaInventors: Dharendra Yogi Goswami, Elias K. Stefanakos, Chand K. Jotshi, Jaspreet Dhau
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Publication number: 20180016482Abstract: In one embodiment, a method for depositing metal on a polymer surface, the method includes coating the polymer surface with a binding metal to render the polymer surface solvophillic and/or hydrophilic and depositing a further metal on the binding metal-coated polymer surface.Type: ApplicationFiled: August 22, 2017Publication date: January 18, 2018Applicant: University of South FloridaInventors: Jaspreet Dhau, D. Yogi Goswami, Chand K. Jotshi, Elias K. Stefanakos
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Patent number: 9765251Abstract: In one embodiment, a phase change material is encapsulated by forming a phase change material pellet, coating the pellet with flexible material, heating the coated pellet to melt the phase change material, wherein the phase change materials expands and air within the pellet diffuses out through the flexible material, and cooling the coated pellet to solidify the phase change material.Type: GrantFiled: December 18, 2013Date of Patent: September 19, 2017Assignee: University of South FloridaInventors: Jaspreet Dhau, Dharendra Goswami, Chand K. Jotshi, Elias K. Stefanakos
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Patent number: 9493695Abstract: Storage systems based on latent heat storage have high-energy storage density, which reduces the footprint of the system and the cost. However, phase change materials (PCMs), such as NaNO3, NaCl, KNO3, have very low thermal conductivities. To enhave the storage of PCMs, macroencapsulation of PCMs was performed using a metal oxide, such as SiO2 or a graphene-SiO2, over polyimide-coated or nickel-embedded, polyimide-coated pellets The macro encapsulation provides a self-supporting structure, enhances the heat transfer rate, and provides a cost effective and reliable solution for thermal energy storage for use in solar thermal power plants. NaNO3 was selected for thermal storage in a temperature range of 300° C. to 500° C. The PCM was encapsulated in a metal oxide cell using self-assembly reactions, hydrolysis, and simultaneous chemical oxidation at various temperatures.Type: GrantFiled: January 21, 2014Date of Patent: November 15, 2016Assignee: University of South FloridaInventors: Manoj Kumar Ram, Chand K. Jotshi, Elias K. Stefanakos, Dharendra Yogi Goswami
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Publication number: 20150284616Abstract: In one embodiment, a phase change material is encapsulated by forming a phase change material pellet, coating the pellet with flexible material, heating the coated pellet to melt the phase change material, wherein the phase change materials expands and air within the pellet diffuses out through the flexible material, and cooling the coated pellet to solidify the phase change material.Type: ApplicationFiled: December 18, 2013Publication date: October 8, 2015Applicant: University of South FloridaInventors: Jaspreet Dhau, Dharendra Goswami, Chand K. Jotshi, Elias K. Stefanakos
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Publication number: 20140197355Abstract: Storage systems based on latent heat storage have high-energy storage density, which reduces the footprint of the system and the cost. However, phase change materials (PCMs), such as NaNO3, NaCl, KNO3, have very low thermal conductivities. To enhave the storage of PCMs, macroencapsulation of PCMs was performed using a metal oxide, such as SiO2 or a graphene-SiO2, over polyimide-coated or nickel-embedded, polyimide-coated pellets The macro encapsulation provides a self-supporting structure, enhances the heat transfer rate, and provides a cost effective and reliable solution for thermal energy storage for use in solar thermal power plants. NaNO3 was selected for thermal storage in a temperature range of 300° C. to 500° C. The PCM was encapsulated in a metal oxide cell using self-assembly reactions, hydrolysis, and simultaneous chemical oxidation at various temperatures.Type: ApplicationFiled: January 21, 2014Publication date: July 17, 2014Applicant: UNIVERSITY OF SOUTH FLORIDAInventors: Manoj Kumar Ram, Chand K. Jotshi, Elias K. Stefanakos, Dharendra Yogi Gaswami
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Patent number: 5694515Abstract: A storage fluid heater for heating a fluid, employs a heat storage unit, a heating element thermally coupled to the heat storage unit, and a heat recovery tube thermally coupled to the heat storage unit. The recovery tube is made from a material having a coefficient of thermal expansion so that as the average temperature of the heat storage unit near the heat recovery tube increases, the surface area of gaps between the heat recovery tube and the storage unit increases, causing the contact resistance between the heat storage unit and the heat recovery tube to increase. The temperature of the fluid flowing within the heat recovery tube is thereby limited to a predetermined maximum. A structure that relieves excess pressure when the flow of fluid through the tube is stopped has an expansion tank connected to the fluid inlet of the tube.Type: GrantFiled: January 9, 1995Date of Patent: December 2, 1997Assignee: The University of FloridaInventors: D. Yogi Goswami, Chung K. Hsieh, Chand K. Jotshi, James F. Klausner
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Patent number: 5687706Abstract: A storage heater for storing heat and for heating a fluid, such as water, has an enclosure defining a chamber therein. The chamber has a lower portion and an upper portion with a heating element being disposed within the enclosure. A tube through which the fluid flows has an inlet and an outlet, both being disposed outside of the enclosure, and has a portion interconnecting the inlet and the outlet that passes through the enclosure. A densely packed bed of phase change material pellets is disposed within the enclosure and is surrounded by a viscous liquid, such as propylene glycol. The viscous liquid is in thermal communication with the heating element, the phase change material pellets, and the tube and transfers heat from the heating element to the pellets and from the pellets to the tube. The viscous fluid has a viscosity so that the frictional pressure drop of the fluid in contact with the phase change material pellets substantially reduces vertical thermal convection in the fluid.Type: GrantFiled: April 25, 1995Date of Patent: November 18, 1997Assignee: University of FloridaInventors: D. Yogi Goswami, Chung K. Hsieh, Chand K. Jotshi, James F. Klausner