Patents by Inventor Jan L. Yang

Jan L. Yang 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).

  • Composition for enzymatic deinking of waste paper
    Patent number: 6767728
    Abstract: A method and composition for deinking noncontact-printed wastepaper, particularly xerographic and laser-printed paper, and mixtures of contact and noncontact-printed wastepaper, using an enzyme mixture characterized by a high ratio of &bgr;-glucosidase activity to filter paper units (FPU) activity. The present invention also relates to an assay for evaluating enzymes for use in deinking wastepaper based on the ratio of &bgr;-glucosidase activity to FPU activity.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: July 27, 2004
    Assignee: University of Georgia Research Foundation, Inc.
    Inventors: Jan L. Yang, Jiahua Ma, J. Michael Pierce, Karl-Erik L Eriksson
  • Composition for enzymatic deinking of waste paper
    Publication number: 20020142452
    Abstract: A method and composition for deinking noncontact-printed wastepaper, particularly xerographic and laser-printed paper, and mixtures of contact and noncontact-printed wastepaper, using an enzyme mixture characterized by a high ratio of &bgr;-glucosidase activity to filter paper units (FPU) activity. The present invention also relates to an assay for evaluating enzymes for use in deinking wastepaper based on the ratio of &bgr;-glucosidase activity to FPU activity.
    Type: Application
    Filed: October 22, 2001
    Publication date: October 3, 2002
    Inventors: Jan L. Yang, Jianhua Ma, J. Michael Pierce, Karl-Erik L. Eriksson
  • Methods for enzymatic deinking of waste paper
    Patent number: 6426200
    Abstract: A method and composition for deinking noncontact-printed wastepaper, particularly xerographic and laser-printed paper, and mixtures of contact and noncontact-printed wastepaper, using an enzyme mixture characterized by a high ratio of &bgr;-glucosidase activity to filter paper units (FPU) activity. The present invention also relates to an assay for evaluating enzymes for use in deinking wastepaper based on the ratio of &bgr;-glucosidase activity to FPU activity.
    Type: Grant
    Filed: August 4, 1999
    Date of Patent: July 30, 2002
    Assignee: University of Georgia Research Foundation, Inc.
    Inventors: Jan L. Yang, Jianhua Ma, J. Michael Pierce, Karl-Erik L Eriksson