Patents by Inventor Lisa Anne Laffend

Lisa Anne Laffend 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
  • Bioconversion of a fermentable carbon source to 1,3-propanediol by a single microorganism
    Patent number: 7169588
    Abstract: A new polypropylene terephthalate composition is provided. The polypropylene terephthalate is comprised of 1,3-propanediol and terephthalate. The 1,3-propanediol is produced by the bioconversion of a fermentatble carbon source, preferable glucose. The resulting polypropylene terephthalate is distinguished from petrochemically produced polymer on the basis of dual carbon-isotopic fingerprinting which indicates both the source and the age of the carbon.
    Type: Grant
    Filed: August 5, 2002
    Date of Patent: January 30, 2007
    Assignees: E. I. du Pont de Nemours and Company, Genencor International, Inc.
    Inventors: Robert R. Burch, Robert R. Dorsch, Lisa Anne Laffend, Vasantha Nagarajan, Charles 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
  • 1,3-propanediol and polymer derivatives from a fermentable carbon source
    Publication number: 20030082756
    Abstract: A new polypropylene terephthalate composition is provided. The polypropylene terephthalate is comprised of 1,3-propanediol and terephthalate. The 1,3-propanediol is produced by the bioconversion of a fermentatble carbon source, preferable glucose. The resulting polypropylene terephthalate is distinguished from petrochemically produced polymer on the basis of dual carbon-isotopic fingerprinting which indicates both the source and the age of the carbon.
    Type: Application
    Filed: August 5, 2002
    Publication date: May 1, 2003
    Inventors: Robert R. Burch, Robert R. Dorsch, Lisa Anne Laffend, Vasantha Nagarajan, Charles Nakamura
  • Method for identifying the source of carbon in 1,3-propanediol
    Patent number: 6428767
    Abstract: A new polypropylene terephthalate composition is provided. The polypropylene terephthalate is comprised of 1,3-propanediol and terephthalate. The 1,3-propanediol is produced by the bioconversion of a fermentatble carbon source, preferable glucose. The resulting polypropylene terephthalate is distinguished from petrochemically produced polymer on the basis of dual carbon-isotopic fingerprinting which indicates both the source and the age of the carbon.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: August 6, 2002
    Assignees: E. I. du Pont de Nemours and Company, Genencor International, Inc.
    Inventors: Robert R. Burch, Robert R. Dorsch, Lisa Anne Laffend, Vasantha Nagarajan, Charles 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
  • 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