Patents by Inventor Charles Edwin Nakamura

Charles Edwin Nakamura 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).

  • Bioconversion of a fermentable carbon source to 1,3-propanediol by a single microorganism
    Patent number: 7629161
    Abstract: A process is provided for the bioconversion of a carbon substrate to 1,3-propanediol by a single organism utilizing microorganisms containing the genes encoding for an active glycerol or diol dehydratase enzyme by contacting these organisms with a carbon substrate under the appropriate fermentation conditions.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: December 8, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Lisa Anne Laffend, Vasantha Nagarajan, Charles Edwin Nakamura
  • Processes for the bioconversion of a fermentable carbon source to 1,3-propanediol by a single microorganism
    Patent number: 7135309
    Abstract: A process is provided for the bioconversion of a carbon substrate to 1,3-propanediol by a single organism utilizing microorganisms, such as, Citrobacter, Enterobacter, Clostridium, Klebsiella, Aerobacter, Lactobacillus, Aspergillus, Saccharomyces, Zygosaccharomyces, Pichia, Kluyveromyces, Candida, Hansenula, Debaryomyces, Mucor, Torulopsis, Methylobacter, Escherichia, Salmonella, Bacillus, Streptomyces and Pseudomonas, containing the genes encoding for an active glycerol or diol dehydratase enzyme by contacting these organisms with a carbon substrate under the appropriate fermentation conditions. Specifically, Citrobacter and, Klebsiella provide the source of exogenous genes for such active dehydratase enzyme.
    Type: Grant
    Filed: May 22, 2000
    Date of Patent: November 14, 2006
    Assignees: E. I. du Pont de Nemours and Company, Genencor International, Inc.
    Inventors: Lisa Anne Laffend, Vasantha Nagarajan, Charles Edwin Nakamura
  • Bioconversion of a fermentable carbon source to 1,3-propanediol by a single microorganism
    Patent number: 6025184
    Abstract: A process is provided for the bioconversion of a carbon substrate to 1,3-propanediol by a single organism utilizing either microorganisms containing the genes encoding for an active glycerol or diol dehydratase enzyme by contacting these organisms with a carbon substrate under the appropriate fermentation conditions.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: February 15, 2000
    Assignees: E. I. du Pont de Nemours and Company, Genencor International Inc.
    Inventors: Lisa Anne Laffend, Vasantha Nagarajan, Charles Edwin Nakamura
  • Production of 1,3-propanediol from glycerol by recombinant bacteria expressing recombinant diol dehydratase
    Patent number: 5821092
    Abstract: A process is provided for the bioconversion of glycerol to 1,3-propanediol in which genes from a bacteria known to possess a diol dehydratase enzyme for 1,2-propanediol degradation are cloned into a bacterial host and the host is grown in the presence of glycerol; expression of the foreign genes in the host cell facilitates the enzymatic conversion of glycerol to 1,3-propanediol which is isolated from the culture.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: October 13, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Vasantha Nagarajan, Charles Edwin Nakamura
  • Bioconversion of a fermentable carbon source to 1,3-propanediol by a single microorganism
    Patent number: 5686276
    Abstract: A process is provided for the bioconversion of a carbon substrate to 1,3-propanediol by a single organism utilizing either microorganisms containing the genes encoding for an active glycerol or diol dehydratase enzyme by contacting these organisms with a carbon substrate under the appropriate fermentation conditions.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: November 11, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lisa Anne Laffend, Vasantha Nagarajan, Charles Edwin Nakamura