Patents by Inventor Anna Zheng
Anna Zheng 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: 20240083901Abstract: The disclosure relates to modulating pyruvate kinase and provides novel chemical compounds useful as activators of PKR, as well as various uses of these compounds. PKR activating compounds are useful in the treatment of diseases and disorders associated with PKR and/or PKM2, such as pyruvate kinase deficiency (PKD), sickle cell disease (SCD), and thalassemia.Type: ApplicationFiled: March 21, 2023Publication date: March 14, 2024Inventors: Anna ERICSSON, Neal GREEN, Gary GUSTAFSON, Bingsong HAN, David R. LANCIA, JR., Lorna MITCHELL, David RICHARD, Tatiana SHELEKHIN, Chase C. SMITH, Zhongguo WANG, Xiaozhang ZHENG
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Patent number: 11848034Abstract: The present disclosure generally relates to magnetic recording devices with stable magnetization. The magnetic recording device comprises a lower leading shield, an upper leading shield disposed on the lower leading shield, a main pole disposed above the upper leading shield, a trailing shield disposed above the main pole and upper leading shield, and an upper return pole disposed above the trailing shield. A first non-magnetic layer is disposed between the lower leading shield and the upper leading shield, and a second non-magnetic layer is disposed between the trailing shield and the upper return pole. The lower leading shield has a different domain state than the upper leading shield, and the trailing shield and the upper leading shield have a same domain state. The materials and thickness of the first and second non-magnetic layers result in magnetostatic coupling or anti-ferromagnetic coupling.Type: GrantFiled: December 3, 2021Date of Patent: December 19, 2023Assignee: Western Digital Technologies, Inc.Inventors: Yingjian Chen, Yonghua Chen, Anna Zheng, Zhanjie Li, Yi Wang, Jian Xiang Shen, Lijie Guan
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Publication number: 20230178104Abstract: The present disclosure generally relates to magnetic recording devices with stable magnetization. The magnetic recording device comprises a lower leading shield, an upper leading shield disposed on the lower leading shield, a main pole disposed above the upper leading shield, a trailing shield disposed above the main pole and upper leading shield, and an upper return pole disposed above the trailing shield. A first non-magnetic layer is disposed between the lower leading shield and the upper leading shield, and a second non-magnetic layer is disposed between the trailing shield and the upper return pole. The lower leading shield has a different domain state than the upper leading shield, and the trailing shield and the upper leading shield have a same domain state. The materials and thickness of the first and second non-magnetic layers result in magnetostatic coupling or anti-ferromagnetic coupling.Type: ApplicationFiled: December 3, 2021Publication date: June 8, 2023Inventors: Yingjian CHEN, Yonghua CHEN, Anna ZHENG, Zhanjie LI, Yi WANG, Jian Xiang SHEN, Lijie GUAN
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Patent number: 11373675Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and an electrically conductive portion located in a trailing gap between the main pole and the trailing magnetic shield. The electrically conductive portion is not part of a spin torque oscillator stack, and the electrically conductive portion includes at least one electrically conductive, non-magnetic material layer. The main pole and the trailing magnetic shield are electrically shorted by the electrically conductive portion across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the electrically conductive portion.Type: GrantFiled: January 4, 2021Date of Patent: June 28, 2022Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Zhigang Bai, Anna Zheng, Venkatesh Chembrolu, Supradeep Narayana, Yaguang Wei, Suping Song, Terence Lam, Michael Kuok San Ho, Changqing Shi, Lijie Guan, Jian-Gang Zhu
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Patent number: 11172868Abstract: A system and method to screen for malignant gliomas, other brain tumors, and brain injuries use disturbance coefficient, differential impedances, and artificial neural networks. The system uses prescribed excitation signals with several system configurations to measure the differential impedances, calculate harmonic responses and nonlinearity of brain tissue, and estimate the disturbance coefficient that indicates the likelihood of malignant gliomas, other brain tumors, and brain injuries. The disturbance coefficient is a weighted sum of many parameters such as receiving differential impedances, transmission differential impedances, harmonic responses, frequency dispersion, and nonlinear responses using different system configurations and different excitation signals. The method includes arranging the transmitters, receivers, and transmission lines to maximize the sensitivity of detecting brain tissue condition.Type: GrantFiled: July 20, 2018Date of Patent: November 16, 2021Inventors: Yi Zheng, Anna Zheng, Qi Wu, Hui Jiang, Shun Zhang, Weining Hu
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Patent number: 11017801Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and a record element located in a trailing gap between the main pole and the trailing magnetic shield. The record element includes an electrically conductive, non-magnetic material portion which is not part of a spin torque oscillator stack. The main pole and the trailing magnetic shield are electrically shorted by the record element across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the record element.Type: GrantFiled: January 18, 2019Date of Patent: May 25, 2021Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Venkatesh Chembrolu, Zhigang Bai, Yaguang Wei, Anna Zheng, Supradeep Narayana, Suping Song, Terence Lam, Michael Kuok San Ho, Changqing Shi, Lijie Guan, Jian-Gang Zhu
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Patent number: 11017802Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and a record element located in a trailing gap between the main pole and the trailing magnetic shield. The record element includes an electrically conductive, non-magnetic material portion which is not part of a spin torque oscillator stack. The main pole and the trailing magnetic shield are electrically shorted by the record element across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the record element.Type: GrantFiled: August 20, 2020Date of Patent: May 25, 2021Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Venkatesh Chembrolu, Zhigang Bai, Yaguang Wei, Anna Zheng, Supradeep Narayana, Suping Song, Terence Lam, Michael Kouk San Ho, Changqing Shi, Lijie Guan, Jian-Gang Zhu
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Publication number: 20210125631Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and an electrically conductive portion located in a trailing gap between the main pole and the trailing magnetic shield. The electrically conductive portion is not part of a spin torque oscillator stack, and the electrically conductive portion includes at least one electrically conductive, non-magnetic material layer. The main pole and the trailing magnetic shield are electrically shorted by the electrically conductive portion across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the electrically conductive portion.Type: ApplicationFiled: January 4, 2021Publication date: April 29, 2021Inventors: Zhigang BAI, Anna ZHENG, Venkatesh CHEMBROLU, Supradeep NARAYANA, Yaguang WEI, Suping SONG, Terence LAM, Michael Kuok San HO, Changqing SHI, Lijie GUAN, Jian-Gang ZHU
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Patent number: 10957348Abstract: A magnetic recording write head has an electrically-conductive structure in the write gap between the write pole and the trailing shield and electrical circuitry for directing current through the write gap. The current through the electrically-conductive structure generates a circular Ampere field which, at the disk-facing end of the write pole, is substantially parallel to the disk-facing end of the write pole. The electrically-conductive structure in the write gap may be a STO or an electrically-conductive layer that is not part of a STO. The current direction through the electrically-conductive structure in the write gap is selected so that the generated Ampere field at the write pole end is in substantially the same direction as the magnetization direction of the write head side shields, which has been discovered to result in minimization of cross-track interference.Type: GrantFiled: June 24, 2020Date of Patent: March 23, 2021Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Zhigang Bai, Alexander Taratorin, Anna Zheng, Venkatesh Chembrolu, Supradeep Narayana, Suping Song, Yaguang Wei, Terence Lam, Michael Kuok San Ho, Changqing Shi, Lijie Guan
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Patent number: 10896690Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and an electrically conductive portion located in a trailing gap between the main pole and the trailing magnetic shield. The electrically conductive portion is not part of a spin torque oscillator stack, and the electrically conductive portion includes at least one electrically conductive, non-magnetic material layer. The main pole and the trailing magnetic shield are electrically shorted by the electrically conductive portion across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the electrically conductive portion.Type: GrantFiled: June 5, 2018Date of Patent: January 19, 2021Assignee: SANDISK TECHNOLOGIES LLCInventors: Zhigang Bai, Anna Zheng, Venkatesh Chembrolu, Supradeep Narayana, Yaguang Wei, Suping Song, Terence Lam, Michael Ho, Changqing Shi, Lijie Guan, Jian-Gang Zhu
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Patent number: 10891975Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and an electrically conductive portion located in a trailing gap between the main pole and the trailing magnetic shield. The electrically conductive portion is not part of a spin torque oscillator stack, and the electrically conductive portion includes at least one electrically conductive, non-magnetic material layer. The main pole and the trailing magnetic shield are electrically shorted by the electrically conductive portion across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the electrically conductive portion.Type: GrantFiled: January 18, 2019Date of Patent: January 12, 2021Assignee: SanDiskTechnologies LLC.Inventors: Zhigang Bai, Anna Zheng, Venkatesh Chembrolu, Supradeep Narayana, Yaguang Wei, Suping Song, Terence Lam, Michael Kuok San Ho, Changqing Shi, Lijie Guan, Jian-Gang Zhu
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Patent number: 10891974Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and a record element located in a trailing gap between the main pole and the trailing magnetic shield. The record element includes an electrically conductive, non-magnetic material portion which is not part of a spin torque oscillator stack. The main pole and the trailing magnetic shield are electrically shorted by the record element across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the record element.Type: GrantFiled: June 5, 2018Date of Patent: January 12, 2021Assignee: SANDISK TECHNOLOGIES LLCInventors: Venkatesh Chembrolu, Zhigang Bai, Yaguang Wei, Anna Zheng, Supradeep Narayana, Suping Song, Terence Lam, Michael Ho, Changqing Shi, Lijie Guan, Jian-Gang Zhu
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Publication number: 20200381012Abstract: A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and a record element located in a trailing gap between the main pole and the trailing magnetic shield. The record element includes an electrically conductive, non-magnetic material portion which is not part of a spin torque oscillator stack. The main pole and the trailing magnetic shield are electrically shorted by the record element across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the record element.Type: ApplicationFiled: August 20, 2020Publication date: December 3, 2020Inventors: Venkatesh CHEMBROLU, Zhigang BAI, Yaguang WEI, Anna ZHENG, Supradeep NARAYANA, Suping SONG, Terence LAM, Michael Kouk San HO, Changqing SHI, Lijie GUAN, Jian-Gang ZHU
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Publication number: 20200327900Abstract: A magnetic recording write head has an electrically-conductive structure in the write gap between the write pole and the trailing shield and electrical circuitry for directing current through the write gap. The current through the electrically-conductive structure generates a circular Ampere field which, at the disk-facing end of the write pole, is substantially parallel to the disk-facing end of the write pole. The electrically-conductive structure in the write gap may be a STO or an electrically-conductive layer that is not part of a STO. The current direction through the electrically-conductive structure in the write gap is selected so that the generated Ampere field at the write pole end is in substantially the same direction as the magnetization direction of the write head side shields, which has been discovered to result in minimization of cross-track interference.Type: ApplicationFiled: June 24, 2020Publication date: October 15, 2020Inventors: Zhigang BAI, Alexander TARATORIN, Anna ZHENG, Venkatesh CHEMBROLU, Supradeep NARAYANA, Suping SONG, Yaguang WEI, Terence LAM, Michael Kuok San HO, Changqing SHI, Lijie GUAN
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Patent number: 10699734Abstract: A magnetic recording write head has an electrically-conductive structure in the write gap between the write pole and the trailing shield and electrical circuitry for directing current through the write gap. The current through the electrically-conductive structure generates a circular Ampere field which, at the disk-facing end of the write pole, is substantially parallel to the disk-facing end of the write pole. The electrically-conductive structure in the write gap may be a STO or an electrically-conductive layer that is not part of a STO. The current direction through the electrically-conductive structure in the write gap is selected so that the generated Ampere field at the write pole end is in substantially the same direction as the magnetization direction of the write head side shields, which has been discovered to result in minimization of cross-track interference.Type: GrantFiled: February 15, 2019Date of Patent: June 30, 2020Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Zhigang Bai, Alexander Taratorin, Anna Zheng, Venkatesh Chembrolu, Supradeep Narayana, Suping Song, Yaguang Wei, Terence Lam, Michael Kuok San Ho, Changqing Shi, Lijie Guan
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Patent number: 10689469Abstract: A method of reactive extrusion copolymerization of vinyl monomer consisting of (1) feeding vinyl monomer or at least one vinyl monomer together with an initiator into the first screw of twin-screw extruder, and modified resin into the subsequent screw section; (2) feeding the above monomer into the screw segment after auto-acceleration zone and feeding the initiator corresponding to the temperature of barrel and micro/nano inorganic modified fillers after the half-life period of the initiator; (3) feeding the antioxidant and anti-UV agent at the end of the polymerization, and then removing unpolymerized monomer and by-products by devolatilization of screw segment; (4) obtaining vinyl copolymer resin with a anticipated molecular weight of 5×102 to 6×105 from the reactive extrusion polymerization by controlling the temperature of different screw segments.Type: GrantFiled: October 11, 2018Date of Patent: June 23, 2020Assignees: EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY, SHANGHAI FUYUAN RUBBER AND PLASTIC TECHNOLOGY LTD.Inventors: Anna Zheng, Yong Guan, Dafu Wei, Xiang Xu, Pengfei Zhan, Weixing Liu, Han Shi
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Publication number: 20190267029Abstract: A magnetic recording write head has an electrically-conductive structure in the write gap between the write pole and the trailing shield and electrical circuitry for directing current through the write gap. The current through the electrically-conductive structure generates a circular Ampere field which, at the disk-facing end of the write pole, is substantially parallel to the disk-facing end of the write pole. The electrically-conductive structure in the write gap may be a STO or an electrically-conductive layer that is not part of a STO. The current direction through the electrically-conductive structure in the write gap is selected so that the generated Ampere field at the write pole end is in substantially the same direction as the magnetization direction of the write head side shields, which has been discovered to result in minimization of cross-track interference.Type: ApplicationFiled: February 15, 2019Publication date: August 29, 2019Inventors: Zhigang BAI, Alexander TARATORIN, Anna ZHENG, Venkatesh CHEMBROLU, Supradeep NARAYANA, Suping SONG, Yaguang WEI, Terence LAM, Michael Kuok San HO, Changqing SHI, Lijie GUAN
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Publication number: 20190040174Abstract: A method of reactive extrusion copolymerization of vinyl monomer consisting of (1) feeding vinyl monomer or at least one vinyl monomer together with an initiator into the first screw of twin-screw extruder, and modified resin into the subsequent screw section; (2) feeding the above monomer into the screw segment after auto-acceleration zone and feeding the initiator corresponding to the temperature of barrel and micro/nano inorganic modified fillers after the half-life period of the initiator; (3) feeding the antioxidant and anti-UV agent at the end of the polymerization, and then removing unpolymerized monomer and by-products by devolatilization of screw segment; (4) obtaining vinyl copolymer resin with a anticipated molecular weight of 5×102 to 6×105 from the reactive extrusion polymerization by controlling the temperature of different screw segments.Type: ApplicationFiled: October 11, 2018Publication date: February 7, 2019Inventors: Anna ZHENG, Yong GUAN, Dafu WEI, Xiang XU, Pengfei ZHAN, Weixing LIU, Han SHI
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Publication number: 20190021647Abstract: A system and method to screen for malignant gliomas, other brain tumors, and brain injuries use disturbance coefficient, differential impedances, and artificial neural networks. The system uses prescribed excitation signals with several system configurations to measure the differential impedances, calculate harmonic responses and nonlinearity of brain tissue, and estimate the disturbance coefficient that indicates the likelihood of malignant gliomas, other brain tumors, and brain injuries. The disturbance coefficient is a weighted sum of many parameters such as receiving differential impedances, transmission differential impedances, harmonic responses, frequency dispersion, and nonlinear responses using different system configurations and different excitation signals. The method includes arranging the transmitters, receivers, and transmission lines to maximize the sensitivity of detecting brain tissue condition.Type: ApplicationFiled: July 20, 2018Publication date: January 24, 2019Inventors: Yi Zheng, Anna Zheng, Qi Wu, Hui Jiang, Shun Zhang, Weining Hu
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Patent number: 8721795Abstract: A process is described for the preparation of water-soluble cellulose hydrolysis products The process comprises admixing cellulose with an ionic liquid capable of solvating or dissolving at least some of the cellulose, said ionic liquid being a compound comprised solely of cations and anions and which exists in a liquid state at a temperature at or below 150° C., and in which the anions are selected from sulfate, hydrogen sulfate and nitrate; and treating the resulting solvate or solution with an acid in the presence of water, said acid having a pKa in water of less than 2 at 25° C.Type: GrantFiled: September 3, 2008Date of Patent: May 13, 2014Assignee: Petroliam Nasional Berhad (PETRONAS)Inventors: Markus Fanselow, John Holbrey, Kenneth Richard Seddon, Laurent Vanoye, Anna Zheng