Patents by Inventor Vasantha Nagarajan

Vasantha Nagarajan 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).

  • Publication number: 20080274526
    Abstract: A method for the production of isobutanol by fermentation using a microbial production host is disclosed. The method employs a reduction in temperature during the fermentation process that results in a more robust tolerance of the production host to the butanol product.
    Type: Application
    Filed: April 28, 2008
    Publication date: November 6, 2008
    Inventors: Michael G. Bramucci, Dennis Flint, Edward S. Miller, Vasantha Nagarajan, Natalia Sedkova, Manjari Singh, Tina K. Van Dyk
  • Publication number: 20080274524
    Abstract: A method for the production of 1-butanol by fermentation using a microbial production host is disclosed. The method employs a reduction in temperature during the fermentation process that results in a more robust tolerance of the production host to the butanol product.
    Type: Application
    Filed: April 28, 2008
    Publication date: November 6, 2008
    Inventors: MICHAEL G. BRAMUCCI, Dennis Flint, Edward S. Miller, Vasantha Nagarajan, Natalia Sedkova, Manjari Singh, Tina K. Van Dyk
  • Publication number: 20080182308
    Abstract: Methods for the fermentive production of four carbon alcohols is provided. Specifically, butanol, preferably 1-butanol is produced by the fermentive growth of a recombinant bacterium expressing a 1-butanol biosynthetic pathway.
    Type: Application
    Filed: September 27, 2006
    Publication date: July 31, 2008
    Inventors: Gail K. Donaldson, Lixuan Lisa Huang, Lori Ann Maggio-Hall, Vasantha Nagarajan, Charles E. Nakamura, Wonchul Suh
  • Publication number: 20080138870
    Abstract: Pediococcus bacteria having enhanced tolerance to butanols have been isolated. The bacteria are useful for the fermentative production of butanol.
    Type: Application
    Filed: December 4, 2007
    Publication date: June 12, 2008
    Inventors: Michael G. Bramucci, Helene M. A. Kane, Vasantha Nagarajan
  • Publication number: 20080124774
    Abstract: Lactobacillus bacteria having enhanced tolerance to butanols have been isolated. The bacteria are useful for the fermentive production of butanol. New methods for the isolation of butanol tolerant Lactobacillus are also provided.
    Type: Application
    Filed: June 12, 2007
    Publication date: May 29, 2008
    Inventors: MICHAEL G. BRAMUCCI, Vasantha Nagarajan, Natalia Sedkova, Manjari Singh
  • Publication number: 20070292927
    Abstract: Methods for the fermentive production of four carbon alcohols are provided. Specifically, butanol, preferably 2-butanol is produced by the fermentive growth of a recombinant bacteria expressing a 2-butanol biosynthetic pathway. The recombinant microorganisms and methods of the invention can also be adapted to produce 2-butanone, an intermediate in the 2-butanol biosynthetic pathways disclosed herein.
    Type: Application
    Filed: April 30, 2007
    Publication date: December 20, 2007
    Inventors: Gail Donaldson, Andrew Eliot, Vasantha Nagarajan, Charles Nakamura, Jean-Francois Tomb
  • Publication number: 20070259410
    Abstract: Methods for the fermentive production of four carbon alcohols are provided. Specifically, butanol, preferably 2-butanol is produced by the fermentive growth of a recombinant bacteria expressing a 2-butanol biosynthetic pathway. The recombinant microorganisms and methods of the invention can also be adapted to produce 2-butanone, an intermediate in the 2-butanol biosynthetic pathways disclosed herein.
    Type: Application
    Filed: April 30, 2007
    Publication date: November 8, 2007
    Inventors: Gail Donaldson, Andrew Eliot, Vasantha Nagarajan, Charles Nakamura, Lixuan Huang
  • Publication number: 20070259411
    Abstract: Enterococcus bacteria having enhanced tolerance to butanols have been isolated. The bacteria are useful for the fermentive production of butanol. New methods for the isolation of butanol tolerant Enterococcus are also provided.
    Type: Application
    Filed: May 2, 2007
    Publication date: November 8, 2007
    Inventors: Michael Bramucci, Vasantha Nagarajan, Natalia Sedkova, Manjari Singh
  • Patent number: 7268221
    Abstract: This invention relates to a method for utilizing less purified starch in fermentation processes. One example is a recombinant E. coli containing a exogenous extracellular isoamylase activity that is capable of utilizing small oligomers containing (1,6) linkages (including but not limited to isomaltose and panose) in fermentations to produce useful products. The invention is useful in large-scale industrial biofermentations by reducing the cost of the substrate carbohydrate.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: September 11, 2007
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Perry G. Caimi, Mario W. Chen, Vasantha Nagarajan Nigarajan, Jean-Francois Tomb, Siqun Wang, Yuying Zhang
  • Publication number: 20070092957
    Abstract: Methods for the fermentative production of four carbon alcohols is provided. Specifically, butanol, preferably isobutanol is produced by the fermentative growth of a recombinant bacterium expressing an isobutanol biosynthetic pathway.
    Type: Application
    Filed: October 25, 2006
    Publication date: April 26, 2007
    Inventors: Gail Donaldson, Andrew Eliot, Dennis Flint, Lori Maggio-Hall, Vasantha Nagarajan
  • Publication number: 20070048849
    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: Application
    Filed: October 30, 2006
    Publication date: March 1, 2007
    Inventors: Lisa Laffend, Vasantha Nagarajan, Charles Nakamura
  • 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
  • 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
  • Patent number: 7125981
    Abstract: Unique bacterial strains and identifying 16S rDNA sequences have been isolated from activated wastewater sludge. The 16S rDNA sequences are diagnostic for organisms which are key to the health of activated sludge wastewater systems.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: October 24, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Helene M. Albertson-Kane, Michael G. Bramucci, Mario W. Chen, Vasantha Nagarajan
  • Patent number: 7125980
    Abstract: Unique bacterial strains and identifying 16S rDNA sequences have been isolated from activated wastewater sludge. The 16S rDNA sequences are diagnostic for organisms which are key to the health of activated sludge wastewater systems.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: October 24, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Michael G. Bramucci, Mario W. Chen, Helene M. Albertson-Kane, Vasantha Nagarajan
  • Patent number: 7105296
    Abstract: Genes have been isolated from a variety of bacteria encoding Baeyer-Villiger monooxygenase activity. The genes and their products are useful for the conversion of ketones to the corresponding esters. A series of motifs, common to all genes, has been identified as diagnostic for genes encoding proteins of this activity.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: September 12, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Michael G. Bramucci, Patricia C. Brzostowicz, Kristy N Kostichka, Vasantha Nagarajan, Pierre E. Rouviere, Stuart M. Thomas
  • Patent number: 7094893
    Abstract: Unique bacterial strains and identifying 16S rDNA sequences have been isolated from activated wastewater sludge. The 16S rDNA sequences are diagnostic for organisms which are key to the health of activated sludge wastewater systems.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: August 22, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Michael G. Bramucci, Mario W. Chen, Helene M. Albertson-Kane, Vasantha Nagarajan
  • Publication number: 20060177930
    Abstract: A microbial consortium for the biodegradation of sulfonated aliphatic-aromatic co-polyesters having greater than 60 mol percent aromatic acid content based on the total acid content of the co-polyester, created by applying selective pressure. Methods to biodegrade sulfonated aliphatic-aromatic co-polyesters using microbial consortium SPDC-1 are provided.
    Type: Application
    Filed: February 3, 2006
    Publication date: August 10, 2006
    Inventors: Michael Bramucci, Vasantha Nagarajan
  • Patent number: 7057030
    Abstract: A gene has been isolated from a Rhodococcus sp. encoding an aldoxime dehydratase enzyme useful for the conversion of aldoxime substrates to nitrilases and other downstream intermediates. The gene has been cloned into a recombinant host and expressed.
    Type: Grant
    Filed: March 12, 2003
    Date of Patent: June 6, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Michael G. Bramucci, Vasantha Nagarajan, Mario W. Chen
  • Patent number: 7053130
    Abstract: Provided is a method for accelerating the biodegradation of aliphatic-aromatic co-polyesters comprising greater than 60 mol percent aromatic acid, based on total diacid in the co-polyester. The method involves contacting at least one hydrolytic enzyme in aqueous solution to the co-polyester.
    Type: Grant
    Filed: May 24, 2004
    Date of Patent: May 30, 2006
    Assignee: E. I . du Pont de Nemours and Company
    Inventor: Vasantha Nagarajan