Patents by Inventor Joyce Liu

Joyce 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: 20210054349
    Abstract: The present invention provides engineered glycosyltransferase (GT) enzymes, polypeptides having GT activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. The present invention provides engineered sucrose synthase (SuS) enzymes, polypeptides having SuS activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. The present invention also provides compositions comprising the GT enzymes and methods of using the engineered GT enzymes to make products with ?-glucose linkages. The present invention further provides compositions and methods for the production of rebaudiosides (e.g., rebaudioside M, rebaudioside A, rebaudioside I, and rebaudioside D). The present invention also provides compositions comprising the SuS enzymes and methods of using them. Methods for producing GT and SuS enzymes are also provided.
    Type: Application
    Filed: October 27, 2020
    Publication date: February 25, 2021
    Inventors: Jonathan Vroom, Stephanie Sue Galanie, Nikki Dellas, Jack Liang, Joyce Liu, David Entwistle, Courtney Dianne Moffett
  • Patent number: 10900055
    Abstract: The present invention provides engineered tyrosine ammonia-lyase (TAL) polypeptides and compositions thereof. In some embodiments, the engineered TAL polypeptides have been optimized to provide enhanced catalytic activity and enhanced acid stability, while reducing sensitivity to proteolysis and increasing tolerance to acidic pH levels. The invention also provides methods for utilization of the compositions comprising the engineered TAL polypeptides for therapeutic and industrial purposes.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: January 26, 2021
    Assignee: Codexis, Inc.
    Inventors: Gjalt W. Huisman, Joyce Liu, Nikki Dellas, Chinping Chng, William Casey Hallows
  • Publication number: 20200190499
    Abstract: The present invention provides engineered tyrosine ammonia-lyase (TAL) polypeptides and compositions thereof. In some embodiments, the engineered TAL polypeptides have been optimized to provide enhanced catalytic activity while reducing sensitivity to proteolysis and increasing tolerance to acidic pH levels. The invention also provides methods for utilization of the compositions comprising the engineered TAL polypeptides for therapeutic and industrial purposes.
    Type: Application
    Filed: December 6, 2019
    Publication date: June 18, 2020
    Inventors: Joyce Liu, Nikki Dellas, Stephan Jenne
  • Publication number: 20200032227
    Abstract: The present invention provides engineered glycosyltransferase (GT) enzymes, polypeptides having GT activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. The present invention provides engineered sucrose synthase (SuS) enzymes, polypeptides having SuS activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. The present invention also provides compositions comprising the GT enzymes and methods of using the engineered GT enzymes to make products with ?-glucose linkages. The present invention further provides compositions and methods for the production of rebaudiosides (e.g., rebaudioside M, rebaudioside A, rebaudioside I, and rebaudioside D). The present invention also provides compositions comprising the SuS enzymes and methods of using them. Methods for producing GT and SuS enzymes are also provided.
    Type: Application
    Filed: July 17, 2019
    Publication date: January 30, 2020
    Inventors: Jonathan Vroom, Stephanie Sue Galanie, Jack Liang, Joyce Liu, Nikki Dellas, Melissa Ann Mayo, David Entwistle
  • Publication number: 20190376097
    Abstract: The present invention provides engineered tyrosine ammonia-lyase (TAL) polypeptides and compositions thereof. In some embodiments, the engineered TAL polypeptides have been optimized to provide enhanced catalytic activity and enhanced acid stability, while reducing sensitivity to proteolysis and increasing tolerance to acidic pH levels. The invention also provides methods for utilization of the compositions comprising the engineered TAL polypeptides for therapeutic and industrial purposes.
    Type: Application
    Filed: June 10, 2019
    Publication date: December 12, 2019
    Inventors: Gjalt W. Huisman, Joyce Liu, Nikki Dellas, Chinping Chng, William Casey Hallows
  • Publication number: 20180223264
    Abstract: The present invention provides engineered glycosyltransferase (GT) enzymes, polypeptides having GT activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. The present invention provides engineered sucrose synthase (SuS) enzymes, polypeptides having SuS activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. The present invention also provides compositions comprising the GT enzymes and methods of using the engineered GT enzymes to make products with ?-glucose linkages. The present invention further provides compositions and methods for the production of rebaudiosides (e.g., rebaudioside M, rebaudioside A, rebaudioside I, and rebaudioside D). The present invention also provides compositions comprising the SuS enzymes and methods of using them. Methods for producing GT and SuS enzymes are also provided.
    Type: Application
    Filed: February 1, 2018
    Publication date: August 9, 2018
    Inventors: Jonathan Vroom, Stephanie Sue Galanie, Nikki Dellas, Jack Liang, Joyce Liu, David Entwistle, Courtney Dianne Moffett
  • Publication number: 20170291956
    Abstract: Methods of treatment of cancer are provided. In particular, methods of treatment of low-grade serous ovarian cancers by inhibiting signaling of an EGFR family member are provided.
    Type: Application
    Filed: July 15, 2015
    Publication date: October 12, 2017
    Inventors: David Livingston, Joyce Liu, Ronny Drapkin
  • Publication number: 20050260819
    Abstract: An FET transistor has a gate disposed between a source and a drain; a gate dielectric layer disposed underneath the gate; and a spacer on a side of the gate. The gate dielectric layer is conventional oxide and the spacer has a reduced dielectric constant (k). The reduced dielectric constant (k) may be less than 3.85, or it may be less than 7.0 (˜nitride), but greater than 3.85 (˜oxide). Preferably, the spacer comprises a material which can be etched selectively to the gate dielectric layer. The spacer may be porous, and a thin layer is deposited on the porous spacer to prevent moisture absorption. The spacer may comprise a material selected from the group consisting of Black Diamond, Coral, TERA and Blok type materials. Pores may be formed in the spacer material by exposing the spacers to an oxygen plasma.
    Type: Application
    Filed: May 20, 2004
    Publication date: November 24, 2005
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael Belyansky, Joyce Liu, Hsing Jen Wann, Richard Wise, Hongwen Yan
  • Patent number: 6727589
    Abstract: A method and structure for protecting a flowable oxide insulator in a semiconductor by oxidizing sidewalls of the FOX insulator, optionally nitridizing the oxidized FOX sidewalls, and then covering all surfaces of a trough or plurality of troughs in the FOX insulator, including the sidewalls, with a conductive secondary protective layer. In a multiple layer damascene structure, the surface of the FOX insulator is also oxidized, an additional oxide layer is deposited thereon, and a nitride layer deposited on the oxide layer. Then steps are repeated to obtain a comparable damascene structure. The materials can vary and each damascene layer may be either a single damascene or a dual damascene layer.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: April 27, 2004
    Assignee: International Business Machines Corporation
    Inventors: Stephen E. Greco, John P. Hummel, Joyce Liu, Vincent J. McGahay, Rebecca Mih, Kamalesh Srivastava
  • Patent number: 6479884
    Abstract: Resist developers can attack some advanced dielectric materials such as silsesquioxane materials which can be used as an insulator between a surface of an integrated circuit chip and wiring layers formed on the surface of the dielectric material. By performing a resist stripping or etching process in which a reactant material is supplied externally or liberated from the dielectric material, an extremely thin surface protective covering of an intermediate material may be formed which is impervious to resist developers or any of a plurality of other materials which may damage the flowable oxide material. A dual Damascene process for forming robust connections and vias to the chip can thus be made compatible with advanced dielectrics having particularly low dielectric constants to minimize conductor capacitance and support fast signal propagation and noise immunity even where conductors are closely spaced to each other.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: November 12, 2002
    Assignee: International Business Machines Corporation
    Inventors: Robert Cook, Stephen E. Greco, John P. Hummel, Joyce Liu, Vincent J. McGahay, Rebecca Mih, Kamalesh Srivastava
  • Patent number: 6348736
    Abstract: Resist developers can attack some advanced dielectric materials such as silsesquioxane materials which can be used as an insulator between a surface of an integrated circuit chip and wiring layers formed on the surface of the dielectric material. A first protective layer is formed in situ on the dielectric material, such as by exposing the material to an oxygen-containing or flourine containing plasma. Also, by performing a resist stripping or etching process in which a reactant material is supplied externally or liberated from the dielectric material, an extremely thin surface protective covering of an intermediate material may be formed which is impervious to resist developers or any of a plurality of other materials which may damage the flowable oxide material. The first protective layer and the surface protective covering can be formed by essentially identical processes.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: February 19, 2002
    Assignee: International Business Machines Corporation
    Inventors: Vincent J. McGahay, John P. Hummel, Joyce Liu, Rebecca Mih, Kamalesh Srivastava, Robert Cook, Stephen E. Greco
  • Patent number: 6329280
    Abstract: Resist developers can attack some advanced dielectric materials such as silsesquioxane materials which can be used as an insulator between a surface of an integrated circuit chip and wiring layers formed on the surface of the dielectric material. By performing a resist stripping or etching process in which a reactant material is supplied externally or liberated from the dielectric material, an extremely thin surface protective covering of an intermediate material may be formed which is impervious to resist developers or any of a plurality of other materials which may damage the flowable oxide material. A dual Damascene process for forming robust connections and vias to the chip can thus be made compatible with advanced dielectrics having particularly low dielectric constants to minimize conductor capacitance and support fast signal propagation and noise immunity even where conductors are closely spaced to each other.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: December 11, 2001
    Assignee: International Business Machines Corporation
    Inventors: Robert Cook, Stephen E. Greco, John P. Hummel, Joyce Liu, Vincent J. McGahay, Rebecca Mih, Kamalesh Srivastava
  • Publication number: 20010036739
    Abstract: Resist developers can attack some advanced dielectric materials such as silsesquioxane materials which can be used as an insulator between a surface of an integrated circuit chip and wiring layers formed on the surface of the dielectric material. By performing a resist stripping or etching process in which a reactant material is supplied externally or liberated from the dielectric material, an extremely thin surface protective covering of an intermediate material may be formed which is impervious to resist developers or any of a plurality of other materials which may damage the flowable oxide material. A dual Damascene process for forming robust connections and vias to the chip can thus be made compatible with advanced dielectrics having particularly low dielectric constants to minimize conductor capacitance and support fast signal propagation and noise immunity even where conductors are closely spaced to each other.
    Type: Application
    Filed: June 29, 2001
    Publication date: November 1, 2001
    Inventors: Robert Cook, Stephen E. Greco, John P. Hummel, Joyce Liu, Vincent J. McGahay, Rebecca Mih, Kamalesh Srivastava
  • Publication number: 20010023987
    Abstract: Poorly adherent layers such as silicon nitride and silicon dioxide exhibit improved adhesion to copper member by providing an intervening germanium-containing layer. The germanium-containing layer is copper germanide, germanium oxide, germanium nitride or combinations thereof. The germanium-containing layer enhances the adhesion such that the poorly adherent layer is less susceptible to delamination from the copper member.
    Type: Application
    Filed: May 7, 2001
    Publication date: September 27, 2001
    Inventors: Vincent J. Mcgahay, Thomas H. Ivers, Joyce Liu, Henry A. Nye
  • Patent number: 6221780
    Abstract: A method and structure for protecting a flowable oxide insulator in a semiconductor by oxidizing sidewalls of the FOX insulator, optionally nitridizing the oxidized FOX sidewalls, and then covering all surfaces of a trough or plurality of troughs in the FOX insulator, including the sidewalls, with a conductive secondary protective layer. In a multiple layer damascene structure, the surface of the FOX insulator is also oxidized, an additional oxide layer is deposited thereon, and a nitride layer deposited on the oxide layer. Then steps are repeated to obtain a comparable damascene structure. The materials can vary and each damascene layer may be either a single damascene or a dual damascene layer.
    Type: Grant
    Filed: September 29, 1999
    Date of Patent: April 24, 2001
    Assignee: International Business Machines Corporation
    Inventors: Stephen E. Greco, John P. Hummel, Joyce Liu, Vincent J. McGahay, Rebecca Mih, Kamalesh Srivastava
  • Publication number: 20010000115
    Abstract: A method and structure for protecting a flowable oxide insulator in a semiconductor by oxidizing sidewalls of the FOX insulator, optionally nitridizing the oxidized FOX sidewalls, and then covering all surfaces of a trough or plurality of troughs in the FOX insulator, including the sidewalls, with a conductive secondary protective layer. In a multiple layer damascene structure, the surface of the FOX insulator is also oxidized, an additional oxide layer is deposited thereon, and a nitride layer deposited on the oxide layer. Then steps are repeated to obtain a comparable damascene structure. The materials can vary and each damascene layer nay be either a single damascene or a dual damascene layer.
    Type: Application
    Filed: November 30, 2000
    Publication date: April 5, 2001
    Inventors: Stephen E. Greco, John P. Hummel, Joyce Liu, Vincent J. McGahay, Rebecca Mih, Kamalesh Srivastava