Patents by Inventor Sung Lai Jimmy Yun
Sung Lai Jimmy Yun 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: 10957915Abstract: The disclosure includes a platinum-based alloy catalyst and a preparation method thereof, a membrane electrode and a fuel cell. The method for preparing the platinum-based alloy catalyst comprises the following steps: (1) preparing nano-sized alloy particles of platinum and 3d transition metal; (2) carrying out acid treatment on the alloy particles prepared in step (1); and (3) annealing the alloy particles treated in step (2). The size of the platinum-based alloy particles is controlled, an atom number ratio of platinum to transition metal in the platinum-based alloy is controlled, and then etching and dissolution of acid is combined so that an atom number ratio of platinum to transition metal is further controlled, subsequently annealing is carried out at high temperature. The prepared platinum-based alloy catalyst improves the stability and durability of the platinum-based alloy catalyst, which supports the large-scale application of the platinum-based alloy catalyst in the fuel cell.Type: GrantFiled: March 22, 2019Date of Patent: March 23, 2021Assignee: QINGDAO CHUANGQI XSNNENG CATALYSIS TECHNOLOGY CO., LTDInventors: Jie Zhang, Xin Liang, Hong Zhao, Sung Lai Jimmy Yun, Di Lu
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Publication number: 20210020955Abstract: The disclosure includes a platinum-based alloy catalyst and a preparation method thereof, a membrane electrode and a fuel cell. The method for preparing the platinum-based alloy catalyst comprises the following steps: (1) preparing nano-sized alloy particles of platinum and 3d transition metal; (2) carrying out acid treatment on the alloy particles prepared in step (1); and (3) annealing the alloy particles treated in step (2). The size of the platinum-based alloy particles is controlled, an atom number ratio of platinum to transition metal in the platinum-based alloy is controlled, and then etching and dissolution of acid is combined so that an atom number ratio of platinum to transition metal is further controlled, subsequently annealing is carried out at high temperature. The prepared platinum-based alloy catalyst improves the stability and durability of the platinum-based alloy catalyst, which supports the large-scale application of the platinum-based alloy catalyst in the fuel cell.Type: ApplicationFiled: March 22, 2019Publication date: January 21, 2021Applicant: QINGDAO CHUANGQI XINNENG CATALYSIS TECHNOLOGY CO., LTDInventors: Jie ZHANG, Xin LIANG, Hong ZHAO, Sung Lai Jimmy YUN, Di LU
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Patent number: 10481301Abstract: There is disclosed a tin-containing metal oxide nanoparticle, which has an index of dispersion degree less than 7 and a narrow particle size distribution which is defined as steepness ratio less than 3. There is disclosed dispersion, paint, shielding film and their glass products which comprise the said nanoparticles. Besides, there are also disclosed processes of making the tin-containing metal oxide nanoparticle and their dispersion. The tin-containing metal oxide nanoparticles and their dispersion disclosed herein may be applied on the window glass of houses, buildings, vehicles, ships, etc. There is provided an excellent function of infrared blocking with highly transparent, and to achieve sunlight controlling and thermal radiation controlling.Type: GrantFiled: September 28, 2017Date of Patent: November 19, 2019Assignees: Xiamen Nanotech Co Ltd, Nanomaterials Technology Pte LtdInventors: Zhigang Shen, Wei Kian Soh, Jiyao Zhang, Aici Wang, Jie Zhong, Sung Lai Jimmy Yun, Hock Sing Sher, Jianfeng Chen
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Publication number: 20180031739Abstract: There is disclosed a tin-containing metal oxide nanoparticle, which has an index of dispersion degree less than 7 and a narrow particle size distribution which is defined as steepness ratio less than 3. There is disclosed dispersion, paint, shielding film and their glass products which comprise the said nanoparticles. Besides, there are also disclosed processes of making the tin-containing metal oxide nanoparticle and their dispersion. The tin-containing metal oxide nanoparticles and their dispersion disclosed herein may be applied on the window glass of houses, buildings, vehicles, ships, etc. There is provided an excellent function of infrared blocking with highly transparent, and to achieve sunlight controlling and thermal radiation controlling.Type: ApplicationFiled: September 28, 2017Publication date: February 1, 2018Inventors: Zhigang SHEN, Wei Kian SOH, Jiyao ZHANG, Aici WANG, Jie ZHONG, Sung Lai Jimmy YUN, Hock Sing SHER, Jianfeng CHEN
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Publication number: 20150320862Abstract: Iron oxide nanoparticle compositions, methods of preparing the nanoparticles using high gravity controlled precipitation (HGCP), and methods of using the nanoparticles are disclosed.Type: ApplicationFiled: November 27, 2013Publication date: November 12, 2015Applicants: NANOMATERIALS TECHNOLOGY PTE LTD, THE JOHNS HOPKINS UNIVERSITYInventors: ROBERT IVKOV, YIT WOOI GOH, MENG TACK NG, ZHIGANG SHEN, SUNG LAI JIMMY YUN
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Patent number: 9090468Abstract: There is disclosed a process of making metal chalcogenide particles. The process comprises the steps of reacting a metal salt solution with a precipitant solution under conditions to form metal chalcogenide particles and by-product thereof, coating the metal chalcogenide particles with a surfactant; and separating the surfactant coated chalcogenide particles from the by-product to obtain metal chalcogenide particles substantially free of by-product.Type: GrantFiled: November 20, 2008Date of Patent: July 28, 2015Assignee: NANOMATERIALS TECHNOLOGY PTE LTDInventors: Zhigang Shen, Meng Tack Ng, Sung Lai Jimmy Yun, Jianfeng Chen, Yit Wooi Goh, Wei Kian Soh
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Publication number: 20150160379Abstract: There is disclosed a tin-containing metal oxide nanoparticle, which has an index of dispersion degree less than 7 and a narrow particle size distribution which is defined as steepness ratio less than 3. There is disclosed dispersion, paint, shielding film and their glass products which comprise the said nanoparticles. Besides, there are also disclosed processes of making the tin-containing metal oxide nanoparticle and their dispersion. The tin-containing metal oxide nanoparticles and their dispersion disclosed herein may be applied on the window glass of houses, buildings, vehicles, ships, etc. There is provided an excellent function of infrared blocking with highly transparent, and to achieve sunlight controlling and thermal radiation controlling.Type: ApplicationFiled: March 27, 2013Publication date: June 11, 2015Inventors: Zhigang Shen, Wei Kian Soh, Jiyao Zhang, Aici Wang, Jie Zhong, Sung Lai Jimmy Yun, Hock Sing Sher, Jianfeng Chen
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Publication number: 20110087009Abstract: A process for the production of a microparticle or a nanoparticle of a chemical compound comprising the steps of providing a solution of said chemical compound in a first liquid; providing a second liquid in which said chemical compound is insoluble or substantially insoluble; combining said liquids in a region of high shear thereby causing formation of said particles; and isolating said particles of said compound. The processing time of a coacervation style process can be reduced and the yield can be substantially increased both by control of the precipitation step which allows for desolvation step to be dispensed with leading to significant process time reduction. The invention also provides a molecular mixing unit comprising an outer body defining a mixing zone; a shear means to provide shear liquid in said mixing zone; at least one fluid inlet means for a first liquid; at least one fluid inlet means for a second liquid and a fluid outlet means.Type: ApplicationFiled: December 16, 2010Publication date: April 14, 2011Inventors: Sung Lai Jimmy YUN, Jian Feng Chen
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Patent number: 7875295Abstract: A process for the production of a microparticle or a nanoparticle of a chemical compound comprising the steps of providing a solution of said chemical compound in a first liquid; providing a second liquid in which said chemical compound is insoluble or substantially insoluble; combining said liquids in a region of high shear thereby causing formation of said particles; and isolating said particles of said compound. The processing time of a coacervation style process can be reduced and the yield can be substantially increased both by control of the precipitation step which allows for desolvation step to be dispensed with leading to significant process time reduction. The invention also provides a molecular mixing unit comprising an outer body defining a mixing zone; a shear means to provide shear liquid in said mixing zone; at least one fluid inlet means for a first liquid; at least one fluid inlet means for a second liquid and a fluid outlet means.Type: GrantFiled: April 15, 2002Date of Patent: January 25, 2011Assignee: Nanomaterials Technology Pte LtdInventors: Sung Lai Jimmy Yun, Jian Feng Chen
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Publication number: 20100298123Abstract: There is disclosed a process of making metal chalcogenide particles. The process comprises the steps of reacting a metal salt solution with a precipitant solution under conditions to form metal chalcogenide particles and by-product thereof, coating the metal chalcogenide particles with a surfactant; and separating the surfactant coated chalcogenide particles from the by-product to obtain metal chalcogenide particles substantially free of by-product.Type: ApplicationFiled: November 20, 2008Publication date: November 25, 2010Applicant: NANOMATERIALS TECHNOLOGY PTE LTDInventors: Zhigang Shen, Meng Tack Ng, Sung Lai Jimmy Yun, Jianfeng Chen, Yit Wooi Goh, Wei Kian Soh
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Publication number: 20080212402Abstract: A process for the production of a microparticle or a nanoparticle of a chemical compound comprising the steps of providing a solution of said chemical compound in a first liquid; providing a second liquid in which said chemical compound is insoluble or substantially insoluble; combining said liquids in a region of high shear thereby causing formation of said particles; and isolating said particles of said compound. The processing time of a coacervation style process can be reduced and the yield can be substantially increased both by control of the precipitation step which allows for the desolvation step to be dispensed with leading to significant process time reduction. The invention also provides a molecular mixing unit comprising an outer body defining a mixing zone; a shear means to provide shear liquid in said mixing zone; at least one fluid inlet means for a first liquid; at least one fluid inlet means for a second liquid and a fluid outlet means.Type: ApplicationFiled: April 8, 2008Publication date: September 4, 2008Inventors: Sung Lai Jimmy Yun, Jian Feng Chen
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Publication number: 20040191319Abstract: A process for the production of a microparticle or a nanoparticle of a chemical compound comprising the steps of providing a solution of said chemical compound in a first liquid; providing a second liquid in which said chemical compound is insoluble or substantially insoluble; combining said liquids in a region of high shear thereby causing formation of said particles; and isolating said particles of said compound. The processing time of a coacervation style process can be reduced and the yield can be substantially increased both by control of the precipitation step which allows for desolvation step to be dispensed with leading to significant process time reduction. The invention also provides a molecular mixing unit comprising an outer body defining a mixing zone; a shear means to provide shear liquid in said mixing zone; at least one fluid inlet means for a first liquid; at least one fluid inlet means for a second liquid and a fluid outlet means.Type: ApplicationFiled: May 17, 2004Publication date: September 30, 2004Inventors: Sung Lai Jimmy Yun, Jian Feng Chen