Patents by Inventor Qu-Ming Gu

Qu-Ming Gu 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).

  • Bio-bleaching of pulp using laccase, mediator, and chain transfer agent
    Publication number: 20030047295
    Abstract: A process of oxidizing a substrate is disclosed. The process comprising the step of treating the substrate with an oxidizing enzyme, a mediator that enhances the oxidative activity of the enzyme, and a chain transfer agent. In one example, the substrate is a lignin-containing material and the process results in bleaching of the lignin-containing material. Examples of some useful enzymes are laccase, catechol oxidase, monophenol monooxygenase, and bilirubin oxidase. A composition comprising an oxidative enzyme, a mediator that enhances the oxidative activity of the enzyme, and a chain transfer agent is also disclosed.
    Type: Application
    Filed: December 20, 2001
    Publication date: March 13, 2003
    Inventors: Huai N. Cheng, Simon Delagrave, Qu-Ming Gu, Dennis J. Murphy
  • Proteins for use as pitch and stickies control agents in pulp and papermaking processes
    Patent number: 6527915
    Abstract: Methods for inhibiting the depositions of organic contaminants from pulp in pulp and papermaking systems are disclosed. Whey proteins are added to the pulp or applied to deposition prone surfaces of a papermaking system.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: March 4, 2003
    Assignee: Hercules Incorporated
    Inventor: Qu-Ming Gu
  • Esterified polysaccharide products and B-lactone ring opened ketene dimer products containing the compositions, and process of making the same
    Patent number: 6528643
    Abstract: Product of esterified polysaccharides and the process of making such product. The process can be enzymatic where an enzyme is used as a catalyst for the reaction. The process can also be chemical where no enzyme is used. Novel products are obtained through lipase-catalyzed &bgr;-lactone ring opening alcoholysis of ketene dimers and the process of making such compositions containing products.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: March 4, 2003
    Assignee: Hercules Incorporated
    Inventors: Huai N. Cheng, Qu Ming Gu
  • Proteins and polymers for use as pitch and stickies control agents in pulp and papermaking processes
    Patent number: 6461477
    Abstract: Methods for inhibiting the depositions of organic contaminants from pulp in pulp and papermaking systems are disclosed. A combination of a protein and a cationic polymer is added to the pulp or applied to deposition prone surfaces of a papermaking system.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: October 8, 2002
    Assignee: Hercules Incorporated
    Inventors: Duy T. Nguyen, Qu-Ming Gu
  • Hydrophobically esterified starch products and process of making the same
    Publication number: 20020123624
    Abstract: A hydrophobically esterified starch, is disclosed, having the general formula: 1
    Type: Application
    Filed: February 23, 2001
    Publication date: September 5, 2002
    Inventors: Lei Qiao, Qu-Ming Gu, H. N. Cheng
  • Esterified polysaccharide products and beta-lactone ring opened ketene dimer products containing the compositions, and process of making the same
    Publication number: 20020106747
    Abstract: Esterified polysaccharides and the process of making such products are disclosed. The process can be enzymatic where an enzyme is used as a catalyst for the reaction. The process can also be chemical where no enzyme is used. Novel Products are obtained through lipase-catalyzed &bgr;-lactone ring opening alcoholysis of ketene dimers and the process of making such compositions containing products.
    Type: Application
    Filed: February 6, 2002
    Publication date: August 8, 2002
    Inventors: H. N. Cheng, Qu Ming Gu
  • Proteins and polymers for use as pitch and stickies control agents in pulp and papermaking processes
    Publication number: 20020096293
    Abstract: Methods for inhibiting the depositions of organic contaminants from pulp in pulp and papermaking systems are disclosed. A combination of a protein and a cationic polymer is added to the pulp or applied to deposition prone surfaces of a papermaking system.
    Type: Application
    Filed: March 22, 2001
    Publication date: July 25, 2002
    Inventors: Duy T. Nguyen, Qu-Ming Gu
  • Proteins for use as pitch and stickies control agents in pulp and papermaking processes
    Publication number: 20010050150
    Abstract: Methods for inhibiting the depositions of organic contaminants from pulp in pulp and papermaking systems are disclosed. Whey proteins are added to the pulp or applied to deposition prone surfaces of a papermaking system.
    Type: Application
    Filed: March 22, 2001
    Publication date: December 13, 2001
    Inventor: Qu-Ming Gu
  • Amine modified polysaccharides
    Patent number: 6159721
    Abstract: Amine modified pectins wherein the amine is a water soluble amine, amino acid, etc. and process to catalyze the reaction of water soluble polymers having alkoxyester and carboxylic acid functionality, such as polysaccharides, with a primary or secondary amine in the presence of a protease and water.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: December 12, 2000
    Assignee: Hercules Incorporated
    Inventors: Huai Nan Cheng, Qu-Ming Gu, Robert G. Nickol