Patents by Inventor Yihua Zhang

Yihua Zhang 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).

  • Publication number: 20180361366
    Abstract: A hydrocracking catalyst comprising a zeolite beta having an average domain size from 800 to 1500 nm2; a zeolite USY; a catalyst support; and at least one metal selected from the group consisting of elements from Group 6 and Groups 8 through 10 of the Periodic Table. The zeolite beta has an OD acidity of 20 to 50 ?mol/g and the catalyst support comprises an amorphous silica aluminate and a second support material when the weight percentage content of the zeolite beta is less than the weight percentage of the zeolite USY, and, when the weight percentage content of the zeolite beta is greater than the weight percentage of the zeolite USY, the zeolite beta has an OD acidity of 20 to 400 ?mol/g, the zeolite beta content is from 0.5 to 10 wt. % and the zeolite USY has an ASDI between 0.05 and 0.12 with a corresponding zeolite USY content of from 0 to 5 wt. %. A process for hydrocracking a hydrocarbonaceous feedstock using the catalyst is also described as is a method for making the hydrocracking catalyst.
    Type: Application
    Filed: August 7, 2018
    Publication date: December 20, 2018
    Inventors: Yihua Zhang, Theodorus Ludovicus Michael Maesen, Yalin Hao, Thomas Michael Rea, Don Ramon Bushee
  • Publication number: 20180314593
    Abstract: Methods, systems, and devices for operating a memory cell or cells are described. An error in stored data may be detected by an error correction code (ECC) operation during sensing of the memory cells used to store the data. The error may be indicated in hardware by generating a measurable signal on an output node. For example, the voltage at the output node may be changed from a first value to a second value. A device monitoring the output node may determine an error has occurred for a set of data based at least in part on the change in the signal at the output node.
    Type: Application
    Filed: July 9, 2018
    Publication date: November 1, 2018
    Inventors: Yihua Zhang, Paolo E. Mangalindan, Jianfei Lei, Andrew D. Proescholdt, Gerard A. Kreifels
  • Patent number: 10067827
    Abstract: Methods, systems, and devices for operating a memory cell or cells are described. An error in stored data may be detected by an error correction code (ECC) operation during sensing of the memory cells used to store the data. The error may be indicated in hardware by generating a measurable signal on an output node. For example, the voltage at the output node may be changed from a first value to a second value. A device monitoring the output node may determine an error has occurred for a set of data based at least in part on the change in the signal at the output node.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: September 4, 2018
    Assignee: MICRON TECHNOLOGY, INC.
    Inventors: Yihua Zhang, Paolo E. Mangalindan, Jianfei Lei, Andrew D. Proescholdt, Gerard A. Kreifels
  • Patent number: 10052619
    Abstract: A new crystalline molecular sieve designated SSZ-95 is disclosed. In general, SSZ-95 is synthesized from a reaction mixture suitable for synthesizing MTT-type molecular sieves and maintaining the mixture under crystallization conditions sufficient to form product. The product molecular sieve is subjected to a pre-calcination step, and ion-exchange to remove extra-framework cations, and a post-calcination step. The molecular sieve has a MTT-type framework and a H-D exchangeable acid site density of 0 to 50% relative to molecular sieve SSZ-32.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: August 21, 2018
    Assignee: Chevron U.S.A. Inc.
    Inventors: Adeola Florence Ojo, Yihua Zhang, Guan-Dao Lei, Stacey Ian Zones
  • Patent number: 10046317
    Abstract: A hydrocracking catalyst is provided comprising: a. from 0.5 to 10 wt % zeolite beta having an OD acidity of 20 to 400 ?mol/g and an average domain size from 800 to 1500 nm2; b. from 0 to 5 wt % zeolite USY having an ASDI between 0.05 and 0.12; wherein a wt % of the zeolite beta is greater than the wt % of the zeolite USY; c. a catalyst support; and d. at least one metal selected from the group consisting of elements from Group 6 and Groups 8 through 10 of the Periodic Table. A process for hydrocracking using the hydrocracking catalyst to produce middle distillates is provided. A method for making the hydrocracking catalyst is also provided.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: August 14, 2018
    Assignee: Chevron U.S.A. Inc.
    Inventors: Yihua Zhang, Theodorus Ludovicus Michael Maesen, Yalin Hao, Don Ramon Bushee, Thomas Michael Rea
  • Patent number: 10040058
    Abstract: A hydrocracking catalyst is provided comprising: a zeolite beta having an OD acidity of 20 to 50 ?mol/g and an average crystal size from 300 to 800 nanometers; a zeolite USY; wherein a wt % of the zeolite beta is less than the wt % of the zeolite USY; a support comprising an amorphous silica aluminate and a second support material; and at least one metal selected from the group consisting of elements from Group 6 and Groups 8 through 10 of the Periodic Table. A process for hydrocracking a hydrocarbonaceous feedstock is provided, comprising: contacting the hydrocarbonaceous feedstock with the hydrocracking catalyst under hydrocracking conditions to produce a hydrocracked effluent that comprises middle distillates. A method for making the hydrocracking catalyst is also provided.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: August 7, 2018
    Assignee: Chevron U.S.A. Inc.
    Inventors: Yihua Zhang, Theodorus Ludovicus Michael Maesen, Yalin Hao, Thomas Michael Rea
  • Publication number: 20180143908
    Abstract: Subject matter disclosed herein relates to techniques to read memory in a continuous fashion.
    Type: Application
    Filed: November 1, 2017
    Publication date: May 24, 2018
    Inventors: Yihua Zhang, Jun Shen
  • Publication number: 20180136873
    Abstract: Direct data transfer between devices having a shared bus may be implemented with reduced involvement from a controller associated with the devices. A controller, a source memory device, and a target memory device may be coupled with a shared bus. The controller may identify a source address at the source memory device for data to be transferred to the target memory device. The controller also may identify a target address in the target memory device, and initiate a data transfer directly from the source to the target through a command that is received at both the source and the target memory device. In response to the command, the source memory device may read data out to the bus, and the target memory may read the data from the bus and store the data starting at the target address without further commands from the controller.
    Type: Application
    Filed: December 27, 2017
    Publication date: May 17, 2018
    Inventors: Yihua Zhang, James Cooke
  • Patent number: 9944863
    Abstract: The present invention is directed to an improved hydrocracking catalyst containing an amorphous silica-alumina (ASA) base and alumina support. The ASA base is characterized as having a high nanopore volume and low particle density. The alumina support is characterized as having a high nanopore volume. Hydrocracking catalysts employing the combination high nanopore volume ASA base and alumina support exhibit improved hydrogen efficiency, and greater product yield and quality, as compared to hydrocracking catalysts containing conventional ASA base and alumina components.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: April 17, 2018
    Assignee: Chevron U.S.A. Inc.
    Inventors: Yihua Zhang, Theodorus Ludovicus Michael Maesen
  • Patent number: 9939294
    Abstract: A demodulation system for 3D-matrix multi-channel fiber optic sensing includes a wavelength swept optical source that generates an incident light, an optical frequency domain reflector and a balanced detector connected with the wavelength swept optical source through a fiber circulator. The optical frequency domain reflector includes a first optical path and a second optical path with a frequency shifter arranged on one or both of the optical paths. The optical frequency domain reflector outputs incident light to an optical switch module. The optical switch module selectively transmits the incident light to a sensor network as well as transmits the reflection light from the sensor network to the optical frequency domain reflector.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: April 10, 2018
    Assignee: ANDOL TECHNOLOGY, INC.
    Inventors: Deguang Liu, Yifei Qian, Yihua Zhang
  • Patent number: 9920260
    Abstract: Uses for a family of new crystalline molecular sieves designated SSZ-91 are disclosed. Molecular sieve SSZ-91 is structurally similar to sieves falling within the ZSM-48 family of molecular sieves, and is characterized as: (1) having a low degree of faulting, (2) a low aspect ratio that inhibits hydrocracking as compared to conventional ZSM-48 materials having an aspect ratio of greater than 8, and (3) is substantially phase pure.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: March 20, 2018
    Assignee: Chevron U.S.A. Inc.
    Inventors: Adeola Florence Ojo, Dan Xie, Yihua Zhang, Guan-Dao Lei
  • Publication number: 20180004596
    Abstract: Methods, systems, and devices for operating a memory cell or cells are described. An error in stored data may be detected by an error correction code (ECC) operation during sensing of the memory cells used to store the data. The error may be indicated in hardware by generating a measurable signal on an output node. For example, the voltage at the output node may be changed from a first value to a second value. A device monitoring the output node may determine an error has occurred for a set of data based at least in part on the change in the signal at the output node.
    Type: Application
    Filed: June 29, 2016
    Publication date: January 4, 2018
    Inventors: Yihua Zhang, Paolo E. Mangalindan, Jianfei Lei, Andrew D. Proescholdt, Gerard A. Kreifels
  • Patent number: 9830267
    Abstract: Subject matter disclosed herein relates to techniques to read memory in a continuous fashion.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: November 28, 2017
    Assignee: MICRON TECHNOLOGY, INC.
    Inventors: Yihua Zhang, Jun Shen
  • Patent number: 9802830
    Abstract: A family of new crystalline molecular sieves designated SSZ-91 is disclosed. Molecular sieve SSZ-91 is structurally similar to sieves falling within the ZSM-48 family of molecular sieves, and is characterized as: (1) having a low degree of faulting, (2) a low aspect ratio that inhibits hydrocracking as compared to conventional ZSM-48 materials having an aspect ratio of greater than 8, and (3) is substantially phase pure.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: October 31, 2017
    Assignee: Chevron U.S.A. Inc.
    Inventors: Adeola Florence Ojo, Dan Xie, Yihua Zhang, Guan-Dao Lei
  • Publication number: 20170157600
    Abstract: A new crystalline molecular sieve designated SSZ-95 is disclosed. In general, SSZ-95 is synthesized from a reaction mixture suitable for synthesizing MTT-type molecular sieves and maintaining the mixture under crystallization conditions sufficient to form product. The product molecular sieve is subjected to a pre-calcination step, and ion-exchange to remove extra-framework cations, and a post-calcination step. The molecular sieve has a MTT-type framework and a H-D exchangeable acid site density of 0 to 50% relative to molecular sieve SSZ-32.
    Type: Application
    Filed: February 21, 2017
    Publication date: June 8, 2017
    Applicant: CHEVRON U.S.A. INC.
    Inventors: ADEOLA FLORENCE OJO, YIHUA ZHANG, GUAN-DAO LEI, STACEY IAN ZONES
  • Publication number: 20170123715
    Abstract: Direct data transfer between devices having a shared bus may be implemented with reduced involvement from a controller associated with the devices. A controller, a source memory device, and a target memory device may be coupled with a shared bus. The controller may identify a source address at the source memory device for data to be transferred to the target memory device. The controller also may identify a target address in the target memory device, and initiate a data transfer directly from the source to the target through a command that is received at both the source and the target memory device. In response to the command, the source memory device may read data out to the bus, and the target memory may read the data from the bus and store the data starting at the target address without further commands from the controller.
    Type: Application
    Filed: October 30, 2015
    Publication date: May 4, 2017
    Inventors: Yihua Zhang, James Cooke
  • Patent number: 9616419
    Abstract: The present invention is directed to an improved finished hydroisomerization catalyst manufactured from a first high nanopore volume (HNPV) alumina and a pore size distribution characterized by a full width at half-maximum, normalized to pore volume, of 15 to 25 nm·g/cc, and a second HNPV alumina having a pore size distribution characterized by a full width at half-maximum, normalized to pore volume, of 5 to 15 nm·g/cc. Their combination yields a HNPV base extrudate having a low particle density as compared to a conventional base extrudates.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: April 11, 2017
    Assignee: Chevron U.S.A. Inc.
    Inventors: Yihua Zhang, Kamala Raghunathan Krishna, Guan-Dao Lei, Theodorus Ludovicus Michael Maesen
  • Publication number: 20170058209
    Abstract: Uses for a family of new crystalline molecular sieves designated SSZ-91 are disclosed. Molecular sieve SSZ-91 is structurally similar to sieves falling within the ZSM-48 family of molecular sieves, and is characterized as: (1) having a low degree of faulting, (2) a low aspect ratio that inhibits hydrocracking as compared to conventional ZSM-48 materials having an aspect ratio of greater than 8, and (3) is substantially phase pure.
    Type: Application
    Filed: August 27, 2015
    Publication date: March 2, 2017
    Inventors: Adeola Florence Ojo, Dan Xie, Yihua Zhang, Guan-Dao Lei
  • Publication number: 20170056869
    Abstract: A family of new crystalline molecular sieves designated SSZ-91 is disclosed. Molecular sieve SSZ-91 is structurally similar to sieves falling within the ZSM-48 family of molecular sieves, and is characterized as: (1) having a low degree of faulting, (2) a low aspect ratio that inhibits hydrocracking as compared to conventional ZSM-48 materials having an aspect ratio of greater than 8, and (3) is substantially phase pure.
    Type: Application
    Filed: August 27, 2015
    Publication date: March 2, 2017
    Inventors: Adeola Florence Ojo, Dan Xie, Yihua Zhang, Guan-Dao Lei
  • Publication number: 20170056868
    Abstract: A family of new crystalline molecular sieves designated SSZ-91 is disclosed. Molecular sieve SSZ-91 is structurally similar to sieves falling within the ZSM-48 family of molecular sieves, and is characterized as: (1) having a low degree of faulting, (2) a low aspect ratio that inhibits hydrocracking as compared to conventional ZSM-48 materials having an aspect ratio of greater than 8, and (3) is substantially phase pure.
    Type: Application
    Filed: August 27, 2015
    Publication date: March 2, 2017
    Inventors: Adeola Florence Ojo, Dan Xie, Yihua Zhang, Guan-Dao Lei