Patents by Inventor Huadong DU

Huadong DU 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).

  • Truncated pullulanases, methods of production, and methods of use thereof
    Patent number: 10400228
    Abstract: Truncated pullulanases having an N-terminal deletion in a parental pullulanase are provided. These truncated pullulanases have altered properties as compared to the parental pullulanase, including an increased saccharification rate and higher catalytic activity at acidic pH values below 4.5 and higher temperatures of up to 64° C. These truncated pullulanase also have improved thermal stability as compared to the parental enzyme. Also provided are compositions containing the truncated pullulanases and a glucoamylase, and processes for applying the truncated pullulanases and compositions in the starch industry. Polynucleotides that encode the truncated pullulanases, and recombinant host cells for producing the truncated pullulanases are also described.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: September 3, 2019
    Assignee: NANJING BESTZYME BIO-ENGINEERING CO., LTD.
    Inventors: Yan Fan, Yamin Lu, Xiuzhen Du, Huadong Du, Feng Li
  • TRUNCATED PULLULANASES, METHODS OF PRODUCTION, AND METHODS OF USE THEREOF
    Publication number: 20160369254
    Abstract: Truncated pullulanases having an N-terminal deletion in a parental pullulanase are provided. These truncated pullulanases have altered properties as compared to the parental pullulanase, including an increased saccharification rate and higher catalytic activity at acidic pH values below 4.5 and higher temperatures of up to 64° C. These truncated pullulanase salso have improved thermal stability as compared to the parental enzyme. Also provided are compositions containing the truncated pullulanases and a glucoamylase, and processes for applying the truncated pullulanases and compositions in the starch industry.
    Type: Application
    Filed: November 10, 2015
    Publication date: December 22, 2016
    Inventors: Yan FAN, Yamin LU, Xiuzhen DU, Huadong DU, Feng LI