Patents by Inventor Subramaniam Sabesan

Subramaniam Sabesan 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: 20160021879
    Abstract: The invention provides compounds, formulations and methods for improving plant emergence, growth and yield. More specifically, the present invention relates to compositions comprising the synthetic lipoamino acid glucosamine compounds of Formula I. These compounds may be applied to plant propagating materials, including seeds and other regenerable plant parts, including cuttings, bulbs, rhizomes and tubers. They may also be applied to foliage, or soil either prior to or following planting of plant propagating materials. Such applications may be made alone or in combination with fungicides, insecticides, nematicides and other agricultural agents used to improve plant growth and crop yield. The compounds of Formula I can improve the agronomic performance of a variety of crops including barley, canola, corn, potato, soybean and wheat.
    Type: Application
    Filed: March 12, 2014
    Publication date: January 28, 2016
    Applicant: E. I. Du Pont De Nemours and Company
    Inventors: Zheng-Zheng Huang, Subramaniam Sabesan, Zuohong Yin
  • Publication number: 20160007600
    Abstract: Compounds that are related to natural synthetic lipochitooligosaccharide analogs were chemically synthesized and found to be effective as plant performance enhancers. The compounds are amine-oligosaccharides with a substituent aryl-containing aliphatic carboxylic acid attached at the amine to the terminal amine-sugar unit. The aryl containing aliphatic carboxylic acid terminates with an aromatic ring structure.
    Type: Application
    Filed: March 6, 2014
    Publication date: January 14, 2016
    Inventors: Zheng-Zheng Huang, Anilkumar Raghavanpillai, Subramaniam Sabesan, Christina Jacy Spado, Zuohong Yin
  • Publication number: 20150366195
    Abstract: The invention provides formulations and methods for improving plant growth and crop yield. More specifically, the present invention relates to compositions comprising the synthetic LCO compound tetra-N-acyl-beta-D-methyl-glycoside (TAMG) and the related compounds of Formula I. TAMG may be applied to plant propagating materials, including seeds and other regenerable plant parts, including cuttings, bulbs, rhizomes and tubers. TAMG may also be applied to foliage, or soil either prior to or following planting of plant propagating materials. Such applications may be made alone or in combination with fungicides, insecticides, nematicides and other agricultural agents used to improve plant growth and crop yield. TAMG can improve the agronomic performance of a variety of crops including barley, canola, corn, potato, soybean and wheat.
    Type: Application
    Filed: January 29, 2014
    Publication date: December 24, 2015
    Applicant: Pioneer Hi-Bred International, Inc.
    Inventors: Keith A. O'Bryan, France Rochette, SUBRAMANIAM SABESAN
  • Publication number: 20150305333
    Abstract: The invention provides compositions and methods for improving plant growth and crop yield. More specifically, the present invention relates to compositions comprising the glucosamine amide N-palmitoleyl-D-glucosamine (NPG) and other substituted glucosamine compounds. NPG and its substituted analogs may be applied to plant propagating materials, including seeds and other regenerable plant parts, including cuttings, bulbs, rhizomes and tubers. NPG and its analogs may also be applied to foliage or soil either prior to or following planting of plant propagating materials. Such applications may be made alone or in combination with fungicides, insecticides, nematicides and other agricultural agents used to improve plant growth and crop yield. NPG and its analogs can improve the agronomic performance of a variety of crops including barley, canola, corn, potato, soybean and wheat.
    Type: Application
    Filed: October 25, 2013
    Publication date: October 29, 2015
    Applicant: PIONEER HI-BRED INTERNATIONAL, INC.
    Inventors: Keith A. O'Bryan, France Rochette, Subramaniam Sabesan
  • Patent number: 9090644
    Abstract: Processes for the synthesis of lipochitooligosaccharides were developed. A fully acylated oligoglucosamine precursor is prepared and reacted with a glucosamine monomer that has an amine protecting phthaloyl group. With removal of the phthaloyl group, a fatty acid may be added on the terminal glucosamine unit, forming a lipochitooligosaccharide. The processes can be adapted for use on a commercial scale.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: July 28, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventor: Subramaniam Sabesan
  • Publication number: 20150203461
    Abstract: Processes for producing 5-(hydroxymethyl)furfural are provided. 5-(hydroxymethyl)furfural is a potential platform intermediate in the conversion of biomass to renewable chemicals. The processes use hexoses in an aqueous solution comprising a halide-containing salt, a water-miscible organic solvent, acid, and water providing an aqueous solution comprising a halide-containing salt, a water-miscible organic solvent, acid, and water. The use of small amounts of halide-containing salt results in significant increases in yield.
    Type: Application
    Filed: October 26, 2012
    Publication date: July 23, 2015
    Inventors: Subramaniam Sabesan, Christina S. Stauffer
  • Patent number: 9024047
    Abstract: Furfural is obtained selectively and in good purity from non-fermentable branched sugars found in soluble waste streams of lignocellulosic biomass. In a monophasic method, stillage or syrup is contacted with water and an acid catalyst under suitable reaction conditions to convert the branched non-fermentable branched sugars to furfural. Additionally, the stillage or syrup can be treated with a water-immiscible organic solvent to form a biphasic mixture comprising an aqueous phase and an organic phase. The furfural that is produced preferentially partitions into the organic phase, from which it may be recovered.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: May 5, 2015
    Assignee: E I du Pont de Nemours and Company
    Inventors: Rahul B Kasat, Subramaniam Sabesan
  • Publication number: 20140303361
    Abstract: Processes for the synthesis of lipochitooligosaccharides were developed. A fully acylated oligoglucosamine precursor is prepared and reacted with a glucosamine monomer that has an amine protecting phthaloyl group. With removal of the phthaloyl group, a fatty acid may be added on the terminal glucosamine unit, forming a lipochitooligosaccharide. The processes can be adapted for use on a commercial scale.
    Type: Application
    Filed: June 19, 2014
    Publication date: October 9, 2014
    Inventor: Subramaniam Sabesan
  • Patent number: 8715969
    Abstract: A method for the production of a saccharification product is provided, the method comprising: a) providing a cellulosic feedstock comprising lignin; b) contacting, in water, the feedstock of (a) with at least one metal carbonate at time 0 hour under suitable initial reaction conditions to produce a first delignification slurry; c) contacting the first delignification slurry with a nucleophilic base at time (0+n) hour, where n represents a number greater than zero, under suitable secondary reaction conditions to form a second delignification slurry comprising a lignin-containing liquid fraction and a polysaccharide-enriched solid fraction; d) separating the lignin-containing liquid fraction from the polysaccharide-enriched solid fraction; and e) contacting at least a portion of the polysaccharide-enriched solid fraction with an enzyme consortium to produce a saccharification product comprising xylose and glucose monomers wherein the overall yield of xylose and glucose monomers in the saccharification produc
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: May 6, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Subramaniam Sabesan, Christina Jacy Spado
  • Publication number: 20140051873
    Abstract: Furfural is obtained selectively and in good purity from non-fermentable branched sugars found in soluble waste streams of lignocellulosic biomass. In a monophasic method, stillage or syrup is contacted with water and an acid catalyst under suitable reaction conditions to convert the branched non-fermentable branched sugars to furfural. Additionally, the stillage or syrup can be treated with a water-immiscible organic solvent to form a biphasic mixture comprising an aqueous phase and an organic phase. The furfural that is produced preferentially partitions into the organic phase, from which it may be recovered.
    Type: Application
    Filed: December 20, 2011
    Publication date: February 20, 2014
    Applicant: E I Du Pont de Nemours and Company
    Inventors: Rahul B. Kasat, Subramaniam Sabesan
  • Patent number: 8524474
    Abstract: Methods for obtaining concentrated sugar solution from polysaccharide enriched biomass by contacting biomass with water and at least one nucleophilic base to produce a polysaccharide enriched biomass comprising a solid fraction and a liquid fraction and then contacting the solid fraction with saccharification enzyme consortium to produce a saccharification product comprising at least about 7 percent by weight sugars in 24 hours. The methods include optionally adding at least one additive selected from the group consisting of polyethylene glycols, fatty acid esters, fatty acid ethoxylates, nonionic surfactants derived from polyethoxylated sorbitan and a fatty acid, sodium lauriminodipropionate, sodium cocoamphoacetate, sodium tridecyl ether sulfate and a combination of these, such that enzyme loading of the saccharification enzyme consortium can be reduced.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: September 3, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Subramaniam Sabesan, Christina Jacy Spado
  • Patent number: 8524925
    Abstract: Processes for producing furfural from biomass are provided. The processes use a metal halide in aqueous solutions of water-miscible and can provide a furfural yield of greater than 70%.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: September 3, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Subramaniam Sabesan, Christina Jacy Spado
  • Patent number: 8524924
    Abstract: Furfural is produced from a lignocellulosic feedstock comprising glucan and xylan. The feedstock is contacted with water in the presence of an acid catalyst. The resulting mixture is contacted with at least one water-immiscible organic solvent to form a mixture comprising an aqueous phase and an organic phase. Under suitable reaction conditions, furfural is produced and preferentially partitions into the organic phase, from which it may be recovered.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: September 3, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Christopher Burket, Subramaniam Sabesan
  • Patent number: 8454921
    Abstract: This invention relates to adsorbents useful for storing hydrogen and other small molecules, and to methods for preparing such adsorbents. The adsorbents are produced by heating carbonaceous materials to a temperature of at least 900° C. in an atmosphere of hydrogen.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: June 4, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mark Brandon Shiflett, Subramaniam Sabesan, Steven Raymond Lustig, Pratibha Laxman Gai
  • Publication number: 20130109869
    Abstract: Processes for producing furfural from biomass are provided. The processes use a metal halide in aqueous solutions of water-miscible and can provide a furfural yield of greater than 70%.
    Type: Application
    Filed: October 31, 2011
    Publication date: May 2, 2013
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Subramaniam Sabesan, Christina Jacy Spado
  • Patent number: 8372609
    Abstract: Concentrated sugar solutions obtained from polysaccharide enriched biomass by contacting biomass with water and at least one nucleophilic base to produce a polysaccharide enriched biomass comprising a solid fraction and a liquid fraction and then contacting enriched biomass with a dilute mineral acid selected from the group consisting of sulfuric acid, phosphoric acid, hydrochloric acid, nitric acid, or a combination thereof, to produce an intermediate saccharification product, which is contacted with an enzyme consortium to produce a final saccharification product comprising fermentable sugars.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: February 12, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventor: Subramaniam Sabesan
  • Patent number: 8304535
    Abstract: Sugar solutions are obtained from polysaccharide enriched biomass by contacting biomass with water and at least one nucleophilic base to produce a polysaccharide enriched biomass comprising a solid fraction and a liquid fraction. The solid fraction is separated from the lignin-containing liquid fraction and contacted with an acid solution, the acid solution comprising about 70 weight percent to about 100 weight percent sulfuric acid or an acid mixture comprising phosphoric acid and sulfuric acid, at a temperature and for a reaction time sufficient to produce a decrystallized biomass mixture. Water is added and the diluted biomass mixture is then hydrolyzed to produce a saccharification product comprising sugars.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: November 6, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Mark Andrew Harmer, Subramaniam Sabesan
  • Publication number: 20120157697
    Abstract: Furfural is produced from a lignocellulosic feedstock comprising glucan and xylan. The feedstock is contacted with water in the presence of an acid catalyst. The resulting mixture is contacted with at least one water-immiscible organic solvent to form a mixture comprising an aqueous phase and an organic phase. Under suitable reaction conditions, furfural is produced and preferentially partitions into the organic phase, from which it may be recovered.
    Type: Application
    Filed: December 21, 2010
    Publication date: June 21, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: CHRISTOPHER L. BURKET, SUBRAMANIAM SABESAN
  • Patent number: 8092815
    Abstract: Provided are articles containing a solid surface material with an antimicrobial agent in a thermoset and/or thermoplastic resin matrix, wherein the antimicrobial agent comprises a chitosan-metal complex.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: January 10, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Subramaniam Sabesan
  • Patent number: 8049002
    Abstract: Processes for the synthesis of lipochitooligosaccharides were developed. A fully acylated oligoglucosamine precursor is prepared and reacted with a glucosamine monomer that has an amine protecting phthaloyl group. With removal of the phthaloyl group, a fatty acid may be added on the terminal glucosamine unit, forming a lipochitooligosaccharide. The processes can be adapted for use on a commercial scale.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: November 1, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Subramaniam Sabesan