Patents by Inventor Gary M. Pigeau

Gary M. Pigeau 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 for the production of a fermentation product from a sugar hydrolysate
    Patent number: 8759049
    Abstract: The present invention relates to a method for producing a fermentation product from a sugar hydrolysate. The method comprises fermenting the sugar hydrolysate in a fermentation system with yeast to produce a fermentation broth comprising a fermentation product; introducing acid and an oxidant, such as chlorine dioxide, to the fermentation system so as to expose microbial contaminants in the fermentation system at one or more stages to chlorine dioxide and a pH of less than 3.0; and recovering the fermentation product. In one example of the invention, a yeast slurry obtained from a yeast recycle step is treated with acid and the oxidant.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: June 24, 2014
    Assignee: Iogen Energy Corporation
    Inventors: Gary M. Pigeau, Jan-Maarten A. Geertman
  • METHOD FOR THE PRODUCTION OF A FERMENTATION PRODUCT FROM A SUGAR HYDROLYSATE
    Publication number: 20110207192
    Abstract: The present invention relates to a method for producing a fermentation product from a sugar hydrolysate. The method comprises fermenting the sugar hydrolysate in a fermentation system with yeast to produce a fermentation broth comprising a fermentation product; introducing acid and an oxidant, such as chlorine dioxide, to the fermentation system so as to expose microbial contaminants in the fermentation system at one or more stages to chlorine dioxide and a pH of less than 3.0; and recovering the fermentation product. In one example of the invention, a yeast slurry obtained from a yeast recycle step is treated with acid and the oxidant.
    Type: Application
    Filed: February 22, 2011
    Publication date: August 25, 2011
    Applicant: IOGEN ENERGY CORPORATION
    Inventors: Gary M. Pigeau, Jan-Maarten A. Geertman