Patents by Inventor Kristine Chang

Kristine Chang 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: 20240099844
    Abstract: A delivery apparatus for a medical device can include a handle, a shaft, a plurality of sleeves, and a suture. The shaft includes a proximal end portion coupled to the handle and is configured to be disposed outside of a patient's body during an implantation procedure and a distal end portion configured to be disposed inside a patient's body during the implantation procedure. Each of the sleeves includes a connection portion coupled to the distal end portion of the shaft and a receiving portion configured to receive an apex of a stent or a prosthetic heart valve. The suture extends through the shaft and the sleeves and is configured for releasably securing the stent or the prosthetic heart valve to the receiving portions of the sleeves.
    Type: Application
    Filed: September 29, 2023
    Publication date: March 28, 2024
    Inventors: Arvin T. Chang, Yair A. Neumann, Gil Senesh, Hernan Altman, Scott Louis Pool, Hannah Gibson, Amanda Kristine Anderson White, Peter Phong Tran, Ly Th Phan
  • Publication number: 20150139977
    Abstract: The invention relates to enzymes having xylanase, mannanase and/or glucanase activity, e.g., catalyzing hydrolysis of internal ?-1,4-xylosidic linkages or endo-?-1,4-glucanase linkages; and/or degrading a linear polysaccharide beta-1,4-xylan into xylose. Thus, the invention provides methods and processes for breaking down hemicellulose, which is a major component of the cell wall of plants, including methods and processes for hydrolyzing hemicelluloses in any plant or wood or wood product, wood waste, paper pulp, paper product or paper waste or byproduct. In addition, methods of designing new xylanases, mannanases and/or glucanases and methods of use thereof are also provided. The xylanases, mannanases and/or glucanases have increased activity and stability at increased pH and temperature.
    Type: Application
    Filed: October 22, 2014
    Publication date: May 21, 2015
    Inventors: David Weiner, David Blum, Alexander Varvak, Shaun Healey, Kristine Chang, Geoff Hazlewood, Thomas Todaro, Grace Desantis, Hwai Chang, Connie Jo Hansen, Scott W. Beaver, Thomas Woodward, Charles Hancock
  • Patent number: 8043839
    Abstract: The invention relates to enzymes having xylanase, mannanase and/or glucanase activity, e.g., catalyzing hydrolysis of internal ?-1,4-xylosidic linkages or endo-?-1,4-ghicanase linkages; and/or degrading a linear polysaccharide beta-1,4-xylan into xylose. Thus, the invention provides methods and processes for breaking down hemicellulose, which is a major component of the cell wall of plants, including methods and processes for hydrolyzing hemicelluloses in any plant or wood or wood product, wood waste, paper pulp, paper product or paper waste or byproduct. In addition, methods of designing new xylanases, mannanases and/or glucanases and methods of use thereof are also provided. The xylanases, mannanases and/or glucanases have increased activity and stability at increased pH and temperature.
    Type: Grant
    Filed: February 14, 2007
    Date of Patent: October 25, 2011
    Assignee: Verenium Corporation
    Inventors: David Weiner, David Blum, Alexander Varvak, Shaun Healey, Kristine Chang, Geoff Hazlewood, Thomas Todaro, Grace Desantis, Hwai Chang, Connie Jo Hansen, Scott W. Beaver, Thomas Woodward, Charles Hancock
  • Publication number: 20090155238
    Abstract: The invention relates to enzymes having xylanase, mannanase and/or glucanase activity, e.g., catalyzing hydrolysis of internal ?-1,4-xylosidic linkages or endo-?-1,4-ghicanase linkages; and/or degrading a linear polysaccharide beta-1,4-xylan into xylose. Thus, the invention provides methods and processes for breaking down hemicellulose, which is a major component of the cell wall of plants, including methods and processes for hydrolyzing hemicelluloses in any plant or wood or wood product, wood waste, paper pulp, paper product or paper waste or byproduct. In addition, methods of designing new xylanases, mannanases and/or glucanases and methods of use thereof are also provided. The xylanases, mannanases and/or glucanases have increased activity and stability at increased pH and temperature.
    Type: Application
    Filed: February 14, 2007
    Publication date: June 18, 2009
    Applicant: Verenium Corporation
    Inventors: David Weiner, David Blum, Alexander Varvak, Shaun Healey, Kristine Chang, Geoff Hazlewood, Thomas Todaro, Grace Desantis, Hwai Chang, Connie Jo Hansen, Scott W. Beaver, Thomas Woodward, Charles Hancock
  • Publication number: 20060259993
    Abstract: This invention provides amidases, polynucleotides encoding the amidases, methods of making and using these polynucleotides and polypeptides. In one aspect, the invention provides enzymes having secondary amidase activity, e.g., having activity in the hydrolysis of amides, including enzymes having peptidase, protease and/or hydantoinase activity. In alternative aspects, the enzymes of the invention can be used to used to increase flavor in food (e.g., enzyme ripened cheese), promote bacterial and fungal killing, modify and de-protect fine chemical intermediates, synthesize peptide bonds, carry out chiral resolutions, hydrolyze Cephalosporin C. The enzymes of the invention can be used to generate 7-aminocephalosporanic acid (7-ACA) and semi-synthetic cephalosporin antibiotics, including caphalothin, cephaloridine and cefuroxime. The enzymes of the invention can be used as antimicrobial agents, e.g., as cell wall hydrolytic agents.
    Type: Application
    Filed: January 28, 2003
    Publication date: November 16, 2006
    Inventors: Nelson Barton, David Weiner, William Greenberg, Samantha Luu, Kristine Chang, Elizabeth Waters
  • Publication number: 20040023257
    Abstract: This invention provides amidases, polynucleotides encoding the amidases, methods of making and using these polynucleotides and polypeptides. In one aspect, the invention provides enzymes having secondary amidase activity, e.g., having activity in the hydrolysis of amides, including enzymes having peptidase, protease and/or hydantoinase activity. In alternative aspects, the enzymes of the invention can be used to used to increase flavor in food (e.g., enzyme ripened cheese), promote bacterial and fungal killing, modify and de-protect fine chemical intermediates, synthesize peptide bonds, carry out chiral resolutions, hydrolyze Cephalosporin C. The enzymes of the invention can be used to generate 7-aminocephalosporanic acid (7-ACA) and semi-synthetic cephalosporin antibiotics, including caphalothin, cephaloridine and cefuroxime. The enzymes of the invention can be used as antimicrobial agents, e.g., as cell wall hydrolytic agents.
    Type: Application
    Filed: January 28, 2003
    Publication date: February 5, 2004
    Applicant: Diversa Corporation
    Inventors: Nelson R. Barton, David Paul Weiner, William Greenberg, Samantha Luu, Kristine Chang, Elizabeth Waters
  • Patent number: RE45660
    Abstract: The invention relates to enzymes having xylanase, mannanase and/or glucanase activity, e.g., catalyzing hydrolysis of internal ?-1,4-xylosidic linkages or endo-?-1,4-ghicanase linkages; and/or degrading a linear polysaccharide beta-1,4-xylan into xylose. Thus, the invention provides methods and processes for breaking down hemicellulose, which is a major component of the cell wall of plants, including methods and processes for hydrolyzing hemicelluloses in any plant or wood or wood product, wood waste, paper pulp, paper product or paper waste or byproduct. In addition, methods of designing new xylanases, mannanases and/or glucanases and methods of use thereof are also provided. The xylanases, mannanases and/or glucanases have increased activity and stability at increased pH and temperature.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: September 1, 2015
    Assignee: BP Corporation North America Inc.
    Inventors: David Weiner, David Blum, Alexander Varvak, Shaun Healey, Kristine Chang, Geoff Hazlewood, Thomas Todaro, Grace Desantis, Hwai Chang, Connie Jo Hansen, Scott W. Beaver, Thomas Woodward, Charles Hancock