Patents by Inventor Ruihua Cheng
Ruihua Cheng 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: 12063788Abstract: A thin film molecular memory is provided that satisfies criteria needed to make a molecular spintronic device, based on spin crossover complexes, competitive with silicon technology. These criteria include, device implementation, a low coercive voltage (less than 1V) and low write peak currents (on the order of 104 A/cm2), a device on/off ratio >10, thin film quality, the ability to “lock” the spin state (providing nonvolatility), the ability to isothermally “unlock” and switch the spin state with voltage, conductance change with spin state, room temperature and above room temperature operation, an on-state device resistivity less than 1 ?·cm, a device fast switching speed (less than 100 ps), device endurance (on the order of 1016 switches without degradation), and the ability of having a device with a transistor channel width of 10 nm or below.Type: GrantFiled: January 25, 2022Date of Patent: August 13, 2024Assignees: NUTECH VENTURES, GEORGIA TECH RESEARCH CORPORATION, THE TRUSTEES OF INDIANA UNIVERSITY, BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM, THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Peter A. Dowben, Ruihua Cheng, Xiaoshan Xu, Alpha T. N'Diaye, Aaron Mosey, Guanhua Hao, Thilini K. Ekanayaka, Xuanyuan Jiang, Andrew J. Yost, Andrew Marshall, Azad J. Naeemi
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Publication number: 20220238537Abstract: A thin film molecular memory is provided that satisfies criteria needed to make a molecular spintronic device, based on spin crossover complexes, competitive with silicon technology. These criteria include, device implementation, a low coercive voltage (less than 1V) and low write peak currents (on the order of 104 A/cm2), a device on/off ratio >10, thin film quality, the ability to “lock” the spin state (providing nonvolatility), the ability to isothermally “unlock” and switch the spin state with voltage, conductance change with spin state, room temperature and above room temperature operation, an on-state device resistivity less than 1 ?·cm, a device fast switching speed (less than 100 ps), device endurance (on the order of 1016 switches without degradation), and the ability of having a device with a transistor channel width of 10 nm or below.Type: ApplicationFiled: January 25, 2022Publication date: July 28, 2022Inventors: Peter A. Dowben, Ruihua Cheng, Xiaoshan Xu, Alpha T. N'Diaye, Aaron Mosey, Guanhua Hao, Thilini K. Ekanayaka, Xuanyuan Jiang, Andrew J. Yost, Andrew Marshall, Azad J. Naeemi
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Publication number: 20210224941Abstract: Provided are a method and apparatus for determining trajectory, and a method, apparatus and system for recommending time. The method includes obtaining trajectory information of multiple trajectory points of a first object, the trajectory information including the geographic location of the trajectory point and the time when the first object is located at the trajectory point; clustering the trajectory points according to the geographic location of each trajectory point to obtain multiple regions not overlapped with each other; determining the time corresponding to each region according to the time of at least one trajectory point in each region; arranging the regions according to the time corresponding to each region to obtain a regional motion trajectory of the first object; and determining a frequent trajectory of the first object based on multiple regional motion trajectories, the frequent trajectory including a frequent region and a corresponding frequent time period.Type: ApplicationFiled: August 5, 2019Publication date: July 22, 2021Applicants: BEIJING JINGDONG SHANGKE INFORMATION TECHNOLOGY CO, LTD., BEIJING JINGDONG CENTURY TRADING CO.,LTD.Inventors: Ruihua CHENG, Renmin LIU, Xu LIU
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Patent number: 10369559Abstract: The present invention relates to a composite catalyst, preparation process thereof, and process for catalyzing the trimerization of butadiene using the composite catalyst. The composite catalyst comprises: (A) a titanium compound catalyst active component, (B) an organometallic compound co-catalyst component, (C) a sulfoxide compound catalyst-modifying component, (D) a monoester compound catalyst-modifying component, and (E) a solvent component. The composite catalyst has advantages of excellent selectivity, high catalytic activity, easy preparation and so on.Type: GrantFiled: May 9, 2013Date of Patent: August 6, 2019Assignees: Wanhua Chemical Group Co., Ltd., Wanhua Chemical (Ningbo) Co., Ltd.Inventors: Lei Qin, Weiqi Hua, Ruihua Cheng, Yuan Li, Baiping Liu, Bingbo Hu
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Patent number: 10053523Abstract: The present invention relates to a supported polymetal olefin polymerization catalyst, comprising a porous support, a magnesium-containing support component, a transition metal titanium component supported on the porous support, and further comprising at least one non-magnesium metal component supported on the porous support. Further provided is a preparation method and a use of the supported polymetal olefin polymerization catalyst. An efficient composite support supported polymetal Ziegler-Natta catalyst is provided in the present invention, wherein a porous support, a soluble magnesium compound, and a soluble non-magnesium metal compound are used as raw materials. The supporting of titanium is achieved while a composite support containing magnesium and non-magnesium metal components is formed in situ in the surface of the porous support. The present invention has the advantage of a simple preparation method, a low cost, a controllability of morphology, properties of the catalyst, etc.Type: GrantFiled: November 25, 2015Date of Patent: August 21, 2018Assignee: East China University of Science and TechnologyInventors: Boping Liu, Jingwen Wang, Ruihua Cheng, Xuelian He, Zhen Liu, Ning Zhao
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Publication number: 20170349677Abstract: The present invention relates to a supported polymetal olefin polymerization catalyst, comprising a porous support, a magnesium-containing support component, a transition metal titanium component supported on the porous support, and further comprising at least one non-magnesium metal component supported on the porous support. Further provided is a preparation method and a use of the supported polymetal olefin polymerization catalyst. An efficient composite support supported polymetal Ziegler-Natta catalyst is provided in the present invention, wherein a porous support, a soluble magnesium compound, and a soluble non-magnesium metal compound are used as raw materials. The supporting of titanium is achieved while a composite support containing magnesium and non-magnesium metal components is formed in situ in the surface of the porous support. The present invention has the advantage of a simple preparation method, a low cost, a controllability of morphology, properties of the catalyst, etc.Type: ApplicationFiled: November 25, 2015Publication date: December 7, 2017Inventors: Boping LIU, Jingwen WANG, Ruihua CHENG, Xuelian HE, Zhen LIU, Ning ZHAO
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Patent number: 9725530Abstract: The present invention relates to a supported hybrid vanadium-chromium-based catalyst, characterized in the catalyst is supported on a porous inorganic carrier and a V active site and a inorganic Cr active site are present on the porous inorganic carrier at the same time. The present invention further relates to a process for producing a supported hybrid vanadium-chromium-based catalyst. The invention also provides the preparation method of the catalyst, titanium or fluorine compounds, vanadium salt and chromium salt according to the proportion, different methods of sequence and load on the inorganic carrier, after high temperature roasting, still can further add organic metal catalyst promoter prereduction activation treatment on it. The catalyst of the present invention can be used for producing ethylene homopolymers and ethylene/?-olefin copolymers.Type: GrantFiled: April 19, 2013Date of Patent: August 8, 2017Assignee: EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Ruihua Cheng, Boping Liu, Xin Xue, Yun He, Xuan Dong, Xuelian He, Zhen Liu, Weiwei Liu, Lisong Wang, Qiaoqiao Sun
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Supported double center hybrid polyethylene catalyst, process for preparing the same and use thereof
Patent number: 9611339Abstract: The present invention relates to a carriered hybrid vanadium-chromium-based catalyst, characterized in the catalyst is carriered on a porous inorganic carrier and a V active site and an organic Cr active site are present on the porous inorganic carrier at the same time. The present invention further relates to a process for producing a carriered hybrid vanadium-chromium-based catalyst. The catalyst of the present invention can be used for producing ethylene homopolymers and ethylene/?-olefin copolymers. The hybrid vanadium-chromium-based catalyst can have high activity and produce polyethylene polymers having the properties of broad molecular weight distribution (Part of the products are bimodal distribution) and excellent ?-olefin copolymerization characteristic.Type: GrantFiled: April 15, 2013Date of Patent: April 4, 2017Assignee: EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Ning Zhao, Ruihua Cheng, Xuelian He, Zhen Liu, Boping Liu -
Publication number: 20160152738Abstract: A supported catalyst for olefin polymerization, a preparation method and use thereof. The catalyst comprises a porous carrier A, a magnesium-containing carrier B, and a supported active component containing a transitional metal of titanium. The catalyst is a highly efficient Ziegler-Natta titanium-based catalyst having a composite support formed by a magnesium compound and a silicon compound, wherein the raw material for the magnesium compound may be any soluble magnesium salt. The supported catalyst may be used for preparing olefin homopolymers or olefin copolymers. According to the present invention, the molecular weight, molecular weight distribution of the olefin homopolymer or olefin copolymer as well as the contents and distribution of the comonomers may be adjusted conveniently by means of changing the factors such as types and amounts of organometallic co-catalyst and molecular weight regulator.Type: ApplicationFiled: June 20, 2014Publication date: June 2, 2016Applicant: EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: WANG JINGWEN, BOPING LIU, RUIHUA CHENG, KUELIAN HE, ZHEN LIU
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Patent number: 9130144Abstract: A ferromagnetic/ferroelectric heterostructure thin film is disclosed that exhibits significant magneto-electric coupling. The ferromagnetic/ferroelectric heterostructure thin film includes a) a base layer of silicon substrate, b) a first copper layer deposited on the silicon substrate, c) a first iron layer deposited on the copper layer, d) first aluminum layer deposited on the first iron layer, e) a polymer layer exhibiting ferroelectric properties deposited on the first aluminum layer, f) a second aluminum layer deposited on the polymer layer; g) a second iron layer deposited on the second aluminum layer, and h) a second copper layer deposited on the second iron layer.Type: GrantFiled: May 30, 2013Date of Patent: September 8, 2015Assignee: RHODE ISLAND BOARD OF EDUCATION, STATE OF RHODE ISLAND AND PROVIDENCE PLANTATIONSInventors: Qing (Ken) Yang, Ruihua Cheng
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Publication number: 20150231623Abstract: The present invention relates to a composite catalyst, preparation process thereof, and process for catalyzing the trimerization of butadiene using the composite catalyst. The composite catalyst comprises: (A) a titanium compound catalyst active component, (B) an organometallic compound co-catalyst component, (C) a sulfoxide compound catalyst-modifying component, (D) a monoester compound catalyst-modifying component, and (E) a solvent component. The composite catalyst has advantages of excellent selectivity, high catalytic activity, easy preparation and so on.Type: ApplicationFiled: May 9, 2013Publication date: August 20, 2015Inventors: Lei Qin, Weiqi Hua, Ruihua Cheng, Yuan Li, Baiping Liu, Bingbo Hu
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Publication number: 20150108592Abstract: A ferromagnetic/ferroelectric heterostructure thin film is disclosed that exhibits significant magneto-electric coupling. The ferromagnetic/ferroelectric heterostructure thin film includes a) a base layer of silicon substrate, b) a first copper layer deposited on the silicon substrate, c) a first iron layer deposited on the copper layer, d) first aluminum layer deposited on the first iron layer, e) a polymer layer exhibiting ferroelectric properties deposited on the first aluminum layer, f) a second aluminum layer deposited on the polymer layer; g) a second iron layer deposited on the second aluminum layer, and h) a second copper layer deposited on the second iron layer.Type: ApplicationFiled: May 30, 2013Publication date: April 23, 2015Applicant: Rhode Island Board of Education, State of Rhode Island and Providence PlantationsInventors: Ken Quing Yang, Ruihua Cheng
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Publication number: 20150080540Abstract: The present invention relates to a carriered hybrid vanadium-chromium-based catalyst, characterized in the catalyst is carriered on a porous inorganic carrier and a V active site and an organic Cr active site are present on the porous inorganic carrier at the same time. The present invention further relates to a process for producing a carriered hybrid vanadium-chromium-based catalyst. The catalyst of the present invention can be used for producing ethylene homopolymers and ethylene/?-olefin copolymers. The hybrid vanadium-chromium-based catalyst can have high activity and produce polyethylene polymers having the properties of broad molecular weight distribution (Part of the products are bimodal distribution) and excellent ?-olefin copolymerization characteristic.Type: ApplicationFiled: April 15, 2013Publication date: March 19, 2015Inventors: Ning Zhao, Ruihua Cheng, Xuelian He, Zhen Liu, Boping Liu
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Publication number: 20150065667Abstract: The present invention relates to a supported hybrid vanadium-chromium-based catalyst, characterized in the catalyst is supported on a porous inorganic carrier and a V active site and a inorganic Cr active site are present on the porous inorganic carrier at the same time. The present invention further relates to a process for producing a supported hybrid vanadium-chromium-based catalyst. The invention also provides the preparation method of the catalyst, titanium or fluorine to compounds, vanadium salt and chromium salt according to the proportion, different methods of sequence and load on the inorganic carrier, after high temperature roasting, still can further add organic metal catalyst promoter prereduction activation treatment on it. The catalyst of the present invention can be used for producing ethylene homopolymers and ethylene/?-olefin copolymers.Type: ApplicationFiled: April 19, 2013Publication date: March 5, 2015Applicant: East China University of Science and TechnologyInventors: Ruihua Cheng, Boping Liu, Xin Xue, Yun He, Xuan Dong, Xuelian He, Zhen Liu, Weiwei Liu, Lisong Wang, Qiaoqiao Sun