Patents by Inventor Zhengong Zhang

Zhengong Zhang 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).

  • Method of using ?-amylase from and isoamylase for saccharification
    Patent number: 9765374
    Abstract: A fungal alpha-amylase is provided from Aspergillus fumigatus (AfAmyl). AfAmyl has an optimal pH of 3.5 and is operable at 30-75 degrees C., allowing the enzyme to be used in combination with a glucoamylase and an isoamylase in a saccharification reaction. This obviates the necessity of running a saccharification reaction as a batch process, where the pH and temperature must be readjusted for optimal use of the alpha-amylase or glucoamylase. AfAmyl also catalyzes the saccharification of starch substrates to an oligosaccharide composition significantly enriched in DP2 and (DPI+DP2) compared to the products of saccharification catalyzed by an alpha-amylase from Aspergillus kawachii. This facilitates the utilization of the oligosaccharide composition by a fermenting organism in a simultaneous saccharification and fermentation process, for example.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: September 19, 2017
    Assignee: DANISCO US INC
    Inventors: Ling Hua, Martijn Scheffers, Marco Van Brussel, Casper Vroemen, Bo Zhang, Zhengong Zhang
  • METHOD OF USING ALPHA-AMYLASE FROM ASPERGILLUS FUMIGATUS AND ISOAMYLASE FOR SACCHARIFICATION
    Publication number: 20160032338
    Abstract: A fungal alpha-amylase is provided from Aspergillus fumigatus (AfAmyl). AfAmyl has an optimal pH of 3.5 and is operable at 30-75 degrees C., allowing the enzyme to be used in combination with a glucoamylase and an isoamylase in a saccharification reaction. This obviates the necessity of running a saccharification reaction as a batch process, where the pH and temperature must be readjusted for optimal use of the alpha-amylase or glucoamylase. AfAmyl also catalyzes the saccharification of starch substrates to an oligosaccharide composition significantly enriched in DP2 and (DPI+DP2) compared to the products of saccharification catalyzed by an alpha-amylase from Aspergillus kawachii. This facilitates the utilization of the oligosaccharide composition by a fermenting organism in a simultaneous saccharification and fermentation process, for example.
    Type: Application
    Filed: December 5, 2013
    Publication date: February 4, 2016
    Inventors: Ling Hua, Martijn Scheffers, Marco Van Brussel, Casper Vroemen, Bo Zhang, Zhengong Zhang