Patents by Inventor David E Estell

David E Estell 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).

  • Variant alpha-amylases from and methods of use, thereof
    Patent number: 9090887
    Abstract: Alpha-amylases from Bacillus subtilis (AmyE), variants thereof, nucleic acids encoding the same, and host cells comprising the nucleic acids are provided. Methods of using AmyE or variants thereof are disclosed, including liquefaction and/or saccharification of starch. Such methods may yield sugars useful for ethanol production or high fructose corn syrup production. In some cases, the amylases can be used at low pH, in the absence of calcium, and/or in the absence of a glucoamylase.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: July 28, 2015
    Assignee: DANISCO US INC.
    Inventors: William A Cuevas, Sang-Kyu Lee, Sandra W Ramer, Andrew Shaw, Amr R Toppozada, David E Estell, Louise Wallace, Regina Chin, Carol A Requadt, Scott D Power, Michael J Pepsin
  • ?-amylase (AmyS) variants with improved properties
    Patent number: 8084240
    Abstract: Described are variants of a parent ?-amylase that exhibits an alteration in at least one of the following properties relative to said parent ?-amylase: specific activity, substrate specificity, substrate binding, substrate cleavage, thermal stability, pH-dependent activity, pH-dependent stability, oxidative stability, Ca2+ dependency, pI, and wash performance. The variants are suitable for starch conversion, ethanol production, laundry washing, dish washing, hard surface cleaning, textile desizing, and/or sweetener production.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: December 27, 2011
    Assignee: Danisco US Inc.
    Inventors: William A Cuevas, Sang-Kyu Lee, Sandra W Ramer, Andrew Shaw, Amr R Toppozada, David E Estell, Sura H Hadi