Patents by Inventor Stuart M. Thomas

Stuart M. Thomas 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: 20140273105
    Abstract: Lignocellulosic biomass pretreated with ammonia where the concentration of the biomass in the reaction mixture is reduced over time was found to produce more sugars following saccharification, as compared to equivalent biomass pretreated at constant concentration. The concentration of biomass is a solids concentration, which is the percent of dry biomass relative to the total pretreatment reaction mixture on a weight to weight basis.
    Type: Application
    Filed: March 5, 2014
    Publication date: September 18, 2014
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: PATRICIA CHEUNG, BRADLEY CURT FOX, MING WOEI LAU, JOSEPH MICHAEL SELBY, GREGORY PAUL SHANKWITZ, STUART M THOMAS, RYAN ERIC WARNER
  • Patent number: 7618671
    Abstract: The present invention provides a process using zeolites for recovering isoflavones and removing undesired oligosaccharides from aqueous mixtures, such as soy whey and other plant processing waste products. The aqueous mixture is treated with a large pore hydrophobic zeolite, such as zeolite Beta, to remove isoflavones, followed by treatment with an ultrastabilized, hydrophobic zeolite Y, such as CBV-901 or HiSiv™ 4000, to remove the undesired oligosaccharides raffinose and stachyose. The recovered isoflavones and digestible sugars, glucose, sucrose, and fructose, are useful in food products.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: November 17, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: David Richard Corbin, Vasantha Nagarajan, Vidya Pai, Stuart M. Thomas
  • Patent number: 7618672
    Abstract: The present invention relates to a process for selectively removing undesired oligosaccharides from aqueous mixtures such as plant processing waste products, including soy whey and other vegetable wheys, using an ultrastabilized large pore, hydrophobic zeolite Y. The resulting solution, which contains isoflavones and digestible sugars such as glucose, fructose and sucrose, can serve as the basis for a nutritious new product.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: November 17, 2009
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David Richard Corbin, Vasantha Nagarajan, Vidya Pai, Stuart M. Thomas
  • 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: 7034140
    Abstract: Genes have been isolated from Rhodococcus erythropolis AN12 strain encoding the isoprenoid biosynthetic pathway. The genes and gene products are the first isolated from a Rhodococcus strain. The genes and gene products of the present invention may be used in a variety of ways for the production of isoprenoid compounds in a variety of organisms.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: April 25, 2006
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Michael G. Bramucci, Patricia C. Brzostowicz, Qiong Cheng, Kristy N Kostichka, Pierre E. Rouviere, Vasantha Nagarajan, Luan Tao, Stuart M. Thomas
  • Patent number: 6991931
    Abstract: A method has been developed to maintain the health of an activated sludge environment in a wastewater process comprising monitoring the levels of polyhydroxyalkanoates (PHA) produced as an indicator of bioreactor health and regulating the concentration of feed nutrients and nitrate to maintain bioreactor health. In general, levels of PHA in excess of about 15% to about 20% dry weight of the biomass is an indication that the biocatalytic efficiency of the wastewater treatment process is impaired.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: January 31, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Dominic A. Dragotta, Vasantha Nagarajan, Stuart M. Thomas
  • Publication number: 20040267001
    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: Application
    Filed: July 7, 2004
    Publication date: December 30, 2004
    Inventors: Michael G. Bramucci, Patricia C. Brzostowicz, Kristy N. Kostichka, Vasantha Nagarajan, Pierre E. Rouviere, Stuart M. Thomas
  • Patent number: 6797500
    Abstract: A 10 kb gene cluster has been isolated from Rhodococcus ruber SC1 comprising genes encoding enzymes useful for the synthesis of dodecanoic diacid from cyclododecanone and other cyclic intermediates. The six specific open reading frames have been identified that are associated with dodecanoic diacid biosynthesis. In addition to the expected substrates the enzymes of the instant invention have moderate specificity for C11-C15 compounds.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: September 28, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Mario W. Chen, Qiong Cheng, Katharine Janet Gibson, Kristy Nan-Shan Kostichka, Stuart M. Thomas, Vasantha Nagarajan
  • Patent number: 6794165
    Abstract: A gene cluster has been isolated from an Acinetobacter sp. that encodes the enzymes expected to convert cyclohexanol to adipic acid. The entire gene cluster has been cloned and all open reading frames have been sequenced. Cosmid clones have been identified containing the gene cluster. Demonstration of conversion of cyclohexanol to adipic acid has been made with the recombinant E. coli host strain containing the cosmids.
    Type: Grant
    Filed: October 16, 2002
    Date of Patent: September 21, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Qiong Cheng, Vasantha Nagarajan, Stuart M. Thomas
  • Publication number: 20040152151
    Abstract: A method has been developed to monitor the health of an activated sludge environment in a wastewater process comprising monitoring the levels of polyhydroxyalkanoates (PHA) produced and correlating those levels with various selected sample parameters. In general, levels of PHA in excess of about 15% to about 20% dry weight of the biomass is an indication that the biocatalytic efficiency of the wastewater treatment process is impaired.
    Type: Application
    Filed: January 21, 2004
    Publication date: August 5, 2004
    Inventors: Dominic A. Dragotta, Vasantha Nagarajan, Stuart M. Thomas
  • Patent number: 6737263
    Abstract: A method has been developed to monitor the health of an activated sludge environment in a wastewater process comprising monitoring the levels of polyhydroxyalkanoates (PHA) produced and correlating those levels with various selected sample parameters. In general, levels of PHA in excess of about 15% to about 20% dry weight of the biomass is an indication that the biocatalytic efficiency of the wastewater treatment process is impaired.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: May 18, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Dominic A. Dragotta, Vasantha Nagarajan, Stuart M. Thomas
  • Publication number: 20030233011
    Abstract: This invention relates to a process for producing a mixture of levulinic acid esters and formic acid esters from biomass and olefins, and the composition prepared therefrom. This invention also relates to usage of the mixture of these esters as fuel and as fuel additives for gasoline fuel, diesel fuel, and biofuel.
    Type: Application
    Filed: April 1, 2003
    Publication date: December 18, 2003
    Inventors: Paul Joseph Fagan, Ekaterini Korovessi, Leo Ernest Manzer, Rakesh H. Mehta, Stuart M. Thomas
  • Publication number: 20030215930
    Abstract: A 10 kb gene cluster has been isolated from Rhodococcus ruber SC1 comprising genes encoding enzymes useful for the synthesis of dodecanoic diacid from cyclododecanone and other cyclic intermediates. The six specific open reading frames have been identified that are associated with dodecanoic diacid biosynthesis. In addition to the expected substrates the enzymes of the instant invention have moderate specificity for C11-C15 compounds.
    Type: Application
    Filed: October 25, 2002
    Publication date: November 20, 2003
    Inventors: Mario W. Chen, Qiong Cheng, Katharine J. Gibson, Kristy N. Kostichka, Stuart M. Thomas, Vasantha Nagarajan
  • Patent number: 6632650
    Abstract: A 10 kb gene cluster has been isolated from Rhodococcus ruber SC1 comprising genes encoding enzymes useful for the synthesis of dodecanoic diacid from cyclododecanone and other cyclic intermediates. The six specific open reading frames have been identified that are associated with dodecanoic diacid biosynthesis. In addition to the expected substrates the enzymes of the instant invention have moderate specificity for C11-C15 compounds.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: October 14, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Mario W Chen, Qiong Cheng, Katharine Gibson, Kristy Kostichka, Stuart M Thomas, Vasantha Nagarajan
  • Publication number: 20030170836
    Abstract: This invention relates to a biocatalytic process to produce terephthalic acid and isophthalic acid from p-xylene and m-xylene, respectively. Terephthalic acid has been prepared by oxidizing p-xylene with bacteria belonging to the genus Burkholderia. Conversion of p-xylene into terephthalic acid is accomplished by a single bacterial strain that produces all of the requisite enzymes. In addition, this invention relates to the preparation of isophthalic acid from a mixture of m- and p-xylene.
    Type: Application
    Filed: August 15, 2002
    Publication date: September 11, 2003
    Inventors: Michael G. Bramucci, Carol M. McCutchen, Vasantha Nagarajan, Stuart M. Thomas
  • Publication number: 20030170847
    Abstract: Genes have been isolated from Rhodococcus erythropolis AN12 strain encoding the isoprenoid biosynthetic pathway. The genes and gene products are the first isolated from a Rhodococcus strain. The genes and gene products of the present invention may be used in a variety of ways for the production of isoprenoid compounds in a variety of organisms.
    Type: Application
    Filed: April 22, 2002
    Publication date: September 11, 2003
    Inventors: Michael G. Bramucci, Patricia C. Brzostowicz, Qiong Cheng, Kristy N. Kostichka, Pierre E. Rouviere, Vasantha Nagarajan, Luan Tao, Stuart M. Thomas
  • Publication number: 20030157673
    Abstract: A 10 kb gene cluster has been isolated from Rhodococcus ruber SC1 comprising genes encoding enzymes useful for the synthesis of dodecanoic diacid from cyclododecanone and other cyclic intermediates. The six specific open reading frames have been identified that are associated with dodecanoic diacid biosynthesis. In addition to the expected substrates the enzymes of the instant invention have moderate specificity for C11-C15 compounds.
    Type: Application
    Filed: October 17, 2002
    Publication date: August 21, 2003
    Inventors: Mario W. Chen, Qiong Cheng, Katharine Janet Gibson, Kristy Nan-Shan Kostichka, Stuart M. Thomas, Vasantha Nagarajan
  • Publication number: 20030124695
    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: Application
    Filed: August 28, 2002
    Publication date: July 3, 2003
    Inventors: Michael G. Bramucci, Patricia C. Brzostowicz, Kristy N. Kostichka, Vasantha Nagarajan, Pierre E. Rouviere, Stuart M. Thomas
  • Publication number: 20030087403
    Abstract: A gene cluster has been isolated from an Acinetobacter sp. that encodes the enzymes expected to convert cyclohexanol to adipic acid. The entire gene cluster has been cloned and all open reading frames have been sequenced. Cosmid clones have been identified containing the gene cluster. Demonstration of conversion of cyclohexanol to adipic acid has been made with the recombinant E. coli host strain containing the cosmids.
    Type: Application
    Filed: October 16, 2002
    Publication date: May 8, 2003
    Inventors: Qiong Cheng, Vasantha Nagarajan, Stuart M. Thomas
  • Publication number: 20030077768
    Abstract: The invention relates to a biocatalytic process for the oxidation of substituted polycyclic aromatic compounds to the corresponding carboxylic acids and related compounds. In a preferred embodiment the invention describes a method to produce 6-methyl-2-hydroxymethylnaphthalene, 6-methyl-2-naphthoic acid, 2,6-bis(hydroxymethyl)naphthalene and 2,6-naphthalenedicarboxylic acid from 2,6-dimethylnaphthalene. These compounds have been prepared by oxidizing 2,6-dimethylnaphthalene with a single recombinant microorganism containing the enzyme xylene monooxygenase.
    Type: Application
    Filed: August 7, 2002
    Publication date: April 24, 2003
    Inventors: Michael G. Bramucci, Vasantha Nagarajan, Stuart M. Thomas