Patents by Inventor David W. Liu

David W. Liu 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: 20250059244
    Abstract: Some aspects of this disclosure provide strategies, systems, reagents, methods, and kits that are useful for the targeted editing of nucleic acids, including editing a single site within the genome of a cell or subject, e.g., within the human genome. The disclosure provides fusion proteins of nucleic acid programmable DNA binding proteins (napDNAbp), e.g., Cas9 or variants thereof, and nucleic acid editing proteins such as cytidine deaminase domains (e.g., novel cytidine deaminases generated by ancestral sequence reconstruction), and adenosine deaminases that deaminate adenine in DNA. Aspects of the disclosure relate to fusion proteins (e.g., base editors) that have improved expression and/or localize efficiently to the nucleus. In some embodiments, base editors are codon optimized for expression in mammalian cells. In some embodiments, base editors include multiple nuclear localization sequences (e.g., bipartite NLSs), e.g., at least two NLSs.
    Type: Application
    Filed: July 31, 2024
    Publication date: February 20, 2025
    Applicants: The Broad Institute, Inc., President and Fellows of Harvard College
    Inventors: David R. Liu, Luke W. Koblan, Christopher Gerard Wilson, Jordan Leigh Doman
  • Patent number: 12220734
    Abstract: An information handling system stylus self-cleans a magnet garage arrangement with a garage variable magnet having a first magnetic attraction when the stylus is proximate and information handling system garage and a second magnetic attraction when the stylus is distal the information handling system garage. The second magnetic attraction has a reduced attractive force at the stylus housing outer surface to discourage attraction of contaminants that might scratch or otherwise damage the housing.
    Type: Grant
    Filed: October 26, 2023
    Date of Patent: February 11, 2025
    Assignee: Dell Products L.P.
    Inventors: Kuan-Hung Chou, Yuan-Wei Chang, David W. Grunow, Yi-Chung Chu, Chin-Chung Wu, Ai-Wei Liu
  • Publication number: 20250043313
    Abstract: Disclosed herein are methods and compositions relating to a mutated version of Cas9. This mutation or mutations can be in the RuvC domain of Cas9. The mutated Cas9 can have decreased cleavage of mismatched target compared to a wild type Cas9.
    Type: Application
    Filed: September 13, 2022
    Publication date: February 6, 2025
    Inventors: David W. TAYLOR, Kenneth A. JOHNSON, Jack P.K. BRAVO, Mu-Sen LIU, Tyler DANGERFIELD, Grace Nicole HIBSHMAN
  • Publication number: 20220284082
    Abstract: Systems for issuing authentication challenges based on fraud initiation requests are provided. The system may calculate a fraud risk level based on a fraud initiating request comprising identity-based data. In response to the fraud risk level indicating a risk of fraud, the system may determine an authentication challenge type. The system may cause a display on the client device of an authentication challenge and verify an authentication challenge response received from a client device.
    Type: Application
    Filed: May 25, 2022
    Publication date: September 8, 2022
    Inventors: David W. Liu, Pradeep Vallanur Ramesh, Rohit Chaturvedi
  • Patent number: 11366884
    Abstract: Systems for issuing authentication challenges based on fraud initiation requests are provided. The system may calculate a fraud risk level based on a fraud initiating request comprising identity-based data. In response to the fraud risk level indicating a risk of fraud, the system may generate an authentication challenge based on an authentication challenge type and an authentication challenge delivery channel. The system may transmit the authentication challenge and receive back an authentication challenge response. The system may verify the authentication challenge response and generate an authentication outcome based on the verification.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: June 21, 2022
    Assignee: American Express Travel Related Services Company, Inc.
    Inventors: David W. Liu, Pradeep Vallanur Ramesh, Rohit Chaturvedi
  • Publication number: 20190251234
    Abstract: Systems for issuing authentication challenges based on fraud initiation requests are provided. The system may calculate a fraud risk level based on a fraud initiating request comprising identity-based data. In response to the fraud risk level indicating a risk of fraud, the system may generate an authentication challenge based on an authentication challenge type and an authentication challenge delivery channel. The system may transmit the authentication challenge and receive back an authentication challenge response. The system may verify the authentication challenge response and generate an authentication outcome based on the verification.
    Type: Application
    Filed: February 14, 2018
    Publication date: August 15, 2019
    Applicant: AMERICAN EXPRESS TRAVEL RELATED SERVICES COMPANY, INC.
    Inventors: DAVID W. LIU, PRADEEP VALLANUR RAMESH, ROHIT CHATURVEDI
  • Patent number: 9776936
    Abstract: The xylene isomerization process unit and the transalkylation process units are combined in the present invention. A fractionation column can be shared by the two units, reducing the capital cost of the complex. In some embodiments, a split shell fractionation column and a split separator can be used.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: October 3, 2017
    Assignee: UOP LLC
    Inventors: Jason T. Corradi, David W. Ablin, David W. Liu
  • Patent number: 9085498
    Abstract: The xylene isomerization process unit and the transalkylation process units are combined in the present invention. A fractionation column can be shared by the two units, reducing the capital cost of the complex. In some embodiments, a split shell fractionation column and a split separator can be used.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: July 21, 2015
    Assignee: UOP LLC
    Inventors: Jason T. Corradi, David W. Ablin, David W. Liu
  • Publication number: 20140249341
    Abstract: The xylene isomerization process unit and the transalkylation process units are combined in the present invention. A fractionation column can be shared by the two units, reducing the capital cost of the complex. In some embodiments, a split shell fractionation column and a split separator can be used.
    Type: Application
    Filed: May 16, 2014
    Publication date: September 4, 2014
    Applicant: UOP LLC
    Inventors: Jason T. Corradi, David W. Ablin, David W. Liu
  • Publication number: 20140248193
    Abstract: The xylene isomerization process unit and the transalkylation process units are combined in the present invention. A fractionation column can be shared by the two units, reducing the capital cost of the complex. In some embodiments, a split shell fractionation column and a split separator can be used.
    Type: Application
    Filed: May 16, 2014
    Publication date: September 4, 2014
    Applicant: UOP LLC
    Inventors: Jason T. Corradi, David W. Ablin, David W. Liu
  • Patent number: 8822747
    Abstract: The xylene isomerization process unit and the transalkylation process units are combined in the present invention. A fractionation column can be shared by the two units, reducing the capital cost of the complex. In some embodiments, a split shell fractionation column and a split separator can be used.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: September 2, 2014
    Assignee: UOP LLC
    Inventors: Jason T. Corradi, David W. Ablin, David W. Liu
  • Patent number: 7960600
    Abstract: Meta-xylene is recovered from admixture with other C8 aromatic hydrocarbons including ortho-xylene by liquid phase adsorptive separation. Performance is improved by reducing the concentration of ortho-xylene through adding a sidecut to a prefractionator preparing the feedstock to adsorptive separation.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: June 14, 2011
    Assignee: UOP LLC
    Inventors: Stanley J. Frey, Jason T. Corradi, Richard S. Kempf, David W. Liu
  • Publication number: 20100305380
    Abstract: Meta-xylene is recovered from admixture with other C8 aromatic hydrocarbons including ortho-xylene by liquid phase adsorptive separation. Performance is improved by reducing the concentration of ortho-xylene through adding a sidecut to a prefractionator preparing the feedstock to adsorptive separation.
    Type: Application
    Filed: November 20, 2009
    Publication date: December 2, 2010
    Applicant: UOP LLC
    Inventors: Stanley J. Frey, Jason T. Corradi, Richard S. Kempf, David W. Liu
  • Publication number: 20090198843
    Abstract: The audio input port and output port of a consumer grade display device is used to detect the status of that device. Status information that can be detected includes whether the display is on or off and whether the display is connected to a designated input source.
    Type: Application
    Filed: February 1, 2008
    Publication date: August 6, 2009
    Inventors: Peng LIN, Lucas Aaron Zaientz, David W. Liu
  • Patent number: 5491267
    Abstract: In a process for the production of tertiary ethers by the reaction of an alcohol and isoalkene, a sidecut stream is selected from the etherification separation zone and recycled back to the etherification reaction zone. When this sidecut stream is characterized by an isoalkene to tertiary ether molar concentration ratio that is greater than the isoalkene to tertiary ether molar concentration ratio of the etherification reaction effluent (which is normally at equilibrium conditions), the conversion of isoalkene to tertiary ether is increased.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: February 13, 1996
    Assignee: UOP
    Inventors: Stanley J. Frey, David W. Liu, Charles P. Luebke, Terry L. Marker