Patents by Inventor Donald F. Guay

Donald F. Guay 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).

  • Patent number: 8465559
    Abstract: The present invention is a process and apparatus for forming various bio-products from cellulosic plant material. The plant material is subjected to a pulping step in which lignin is extracted from the material by an aqueous lignin solvent to form a lignin-solvent mixture and purified cellulose. The lignin-solvent mixture can be separated from the water to form a high energy density fuel that can be used independently or combined with biodiesel. The purified cellulose can be used in conventional processes, e.g., paper making, or can be converted to fermentable sugars with a cellulase enzyme to produce other bio-products depending on the operating conditions of the fermenter. The bio-products produced by the fermenter can include the solvent that may be recycled for use in extracting the lignin.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: June 18, 2013
    Assignee: Wisys Technology Foundation, Inc.
    Inventors: Donald F. Guay, Eric L. Singsaas
  • Publication number: 20120329146
    Abstract: The present invention is a process and apparatus for forming various bio-products from cellulosic plant material. The plant material is subjected to a pulping step in which lignin is extracted from the material by an aqueous lignin solvent to form a lignin-solvent mixture and purified cellulose. The lignin-solvent mixture can be separated from the water to form a high energy density fuel that can be used independently or combined with biodiesel. The purified cellulose can be used in conventional processes, e.g., paper making, or can be converted to fermentable sugars with a cellulase enzyme to produce other bio-products depending on the operating conditions of the fermenter. The bio-products produced by the fermenter can include the solvent that may be recycled for use in extracting the lignin.
    Type: Application
    Filed: July 2, 2012
    Publication date: December 27, 2012
    Inventors: Donald F. Guay, Eric L. Singsaas
  • Patent number: 8211189
    Abstract: The present invention is a process and apparatus for forming various bio-products from cellulosic plant material. The plant material is subjected to a pulping step in which lignin is extracted from the material by an aqueous lignin solvent to form a lignin-solvent mixture and purified cellulose. The lignin-solvent mixture can be separated from the water to form a high energy density fuel that can be used independently or combined with biodiesel. The purified cellulose can be used in conventional processes, e.g., paper making, or can be converted to fermentable sugars with a cellulase enzyme to produce other bio-products depending on the operating conditions of the fermenter. The bio-products produced by the fermenter can include the solvent that may be recycled for use in extracting the lignin.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: July 3, 2012
    Assignee: Wisys Technology Foundation, Inc.
    Inventors: Donald F. Guay, Eric L. Singsaas
  • Publication number: 20090145021
    Abstract: The present invention is a process and apparatus for forming various bio-products from cellulosic plant material. The plant material is subjected to a pulping step in which lignin is extracted from the material by an aqueous lignin solvent to form a lignin-solvent mixture and purified cellulose. The lignin-solvent mixture can be separated from the water to form a high energy density fuel that can be used independently or combined with biodiesel. The purified cellulose can be used in conventional processes, e.g., paper making, or can be converted to fermentable sugars with a cellulase enzyme to produce other bio-products depending on the operating conditions of the fermenter. The bio-products produced by the fermenter can include the solvent that may be recycled for use in extracting the lignin.
    Type: Application
    Filed: December 10, 2008
    Publication date: June 11, 2009
    Inventors: Donald F. Guay, Eric L. Singsaas