Patents by Inventor Rakesh Nambiar

Rakesh Nambiar 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: 20190136153
    Abstract: An enzymatically produced ?-glucan oligomer/polymer compositions is provided. The enzymatically produced ?-glucan oligomer/polymers can be derivatized into ?-glucan ether compounds. The ?-glucan oligomers/polymers and the corresponding ?-glucan ethers are cellulose and/or protease resistant, making them suitable for use in fabric care and laundry care applications. Methods for the production and use of the present compositions are also provided.
    Type: Application
    Filed: November 7, 2016
    Publication date: May 9, 2019
    Inventors: Robert DiCosimo, CHENG Qiong, Rakesh Nambiar, Jayme L. Paullin, Mark S. Payne, Zheng You
  • Patent number: 10260053
    Abstract: Compositions are disclosed herein comprising poly alpha-1,3-1,6-glucan with a weight average degree of polymerization (DPw) of at least 1000. This glucan polymer comprises at least 30% alpha-1,3 linkages and at least 30% alpha-1,6 linkages. Further disclosed are glucosyltransferase enzymes that synthesize poly alpha-1,3-1,6-glucan. Ether derivatives of poly alpha-1,3-1,6-glucan and methods of using such derivatives as viscosity modifiers are also disclosed.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: April 16, 2019
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Jayme L. Paullin, Mark S. Payne, T. Joseph Dennes, Yefim Brun, Rakesh Nambiar, Thomas H Scholz
  • Publication number: 20180355072
    Abstract: Compositions are disclosed herein comprising dextran that comprises (i) 87-93 wt % glucose linked at positions 1 and 6; (ii) 0.1-1.2 wt % glucose linked at positions 1 and 3; (iii) 0.1-0.7 wt % glucose linked at positions 1 and 4; (iv) 7.7-8.6 wt % glucose linked at positions 1, 3 and 6; and (v) about 0.4-1.7 wt % glucose linked at (a) positions 1, 2 and 6, or (b) positions 1, 4 and 6. Aqueous forms of this composition have enhanced viscosity profiles. Further disclosed are methods of using compositions comprising dextran, such as increasing the viscosity of an aqueous composition. Enzymatic reactions for producing dextran are also disclosed.
    Type: Application
    Filed: August 24, 2018
    Publication date: December 13, 2018
    Inventors: RAKESH NAMBIAR, RONG GUAN, QIONG CHENG, ROBERT DICOSIMO, JAYME L. PAULLIN, YUANFENG LIANG, CHARLES R. POWLEY, YEFIM BRUN
  • Publication number: 20180312781
    Abstract: An enzymatically produced ?-glucan oligomer/polymer compositions is provided. The enzymatically produced ?-glucan oligomer/polymers can be derivatized into ?-glucan ether compounds. The ?-glucan oligomers/polymers and the corresponding ?-glucan ethers are cellulose and/or protease resistant, making them suitable for use in fabric care and laundry care applications. Methods for the production and use of the present compositions are also provided.
    Type: Application
    Filed: November 7, 2016
    Publication date: November 1, 2018
    Inventors: Robert DiCosimo, Qiong Cheng, Rakesh Nambiar, Jayme L. Paullin, Mark S. Payne, Jahnavi Chandra Prasad, Zheng You
  • Publication number: 20180291122
    Abstract: A hydrocolloid or aqueous solution comprising a poly alpha-1,3-glucan ether compound is disclosed having a viscosity of at least about 10 centipoise (cPs). The poly alpha-1,3-glucan ether compound in these compositions has a degree of substitution of about 0.05 to about 3.0. Also disclosed is a method for increasing the viscosity of a hydrocolloid or aqueous composition using a poly alpha-1,3-glucan ether compound.
    Type: Application
    Filed: June 13, 2018
    Publication date: October 11, 2018
    Inventors: RAHUL B. KASAT, JAYME L. PAULLIN, ANDREA M. PERTICONE, T. JOSEPH DENNES, RAKESH NAMBIAR, MICHAEL W. COBB
  • Publication number: 20180291311
    Abstract: An enzymatically produced ?-glucan oligomer/polymer compositions is provided. The enzymatically produced ?-glucan oligomer/polymers can be derivatized into ?-glucan ether compounds. The ?-glucan oligomers/polymers and the corresponding ?-glucan ethers are cellulose and/or protease resistant, making them suitable for use in fabric care and laundry care applications. Methods for the production and use of the present compositions are also provided.
    Type: Application
    Filed: November 7, 2016
    Publication date: October 11, 2018
    Inventors: Robert DiCosimo, Qiong Cheng, Rakesh Nambiar, Jayme L. Paullin, Mark S. Payne, Jahnavi Chandra Prasad, Zheng You
  • Publication number: 20180273919
    Abstract: Compositions are disclosed herein comprising poly alpha-1,3-1,6-glucan with a weight average degree of polymerization (DPw) of at least 1000. This glucan polymer comprises at least 30% alpha-1,3 linkages and at least 30% alpha-1,6 linkages. Further disclosed are glucosyltransferase enzymes that synthesize poly alpha-1,3-1,6-glucan. Ether derivatives of poly alpha-1,3-1,6-glucan and methods of using such derivatives as viscosity modifiers are also disclosed.
    Type: Application
    Filed: March 23, 2018
    Publication date: September 27, 2018
    Inventors: JAYME L PAULLIN, MARK S. PAYNE, T. JOSEPH DENNES, YEFIM BRUN, RAKESH NAMBIAR, THOMAS H SCHOLZ
  • Patent number: 10072100
    Abstract: Compositions comprising oxidized poly alpha-1,3-glucan compounds are disclosed herein. Oxidized poly alpha-1,3-glucan compounds are produced by contacting poly alpha-1,3-glucan under aqueous conditions with at least one N-oxoammonium salt.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: September 11, 2018
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Rakesh Nambiar, Jayme L Paullin, Andrea M Perticone, T Joseph Dennes
  • Patent number: 10059779
    Abstract: Compositions are disclosed herein comprising dextran that comprises (i) 87-93 wt % glucose linked at positions 1 and 6; (ii) 0.1-1.2 wt % glucose linked at positions 1 and 3; (iii) 0.1-0.7 wt % glucose linked at positions 1 and 4; (iv) 7.7-8.6 wt % glucose linked at positions 1, 3 and 6; and (v) about 0.4-1.7 wt % glucose linked at (a) positions 1, 2 and 6, or (b) positions 1, 4 and 6. Aqueous forms of this composition have enhanced viscosity profiles. Further disclosed are methods of using compositions comprising dextran, such as increasing the viscosity of an aqueous composition. Enzymatic reactions for producing dextran are also disclosed.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: August 28, 2018
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Rakesh Nambiar, Rong Guan, Qiong Cheng, Robert Dicosimo, Jayme L Paullin, Yuanfeng Liang, Charles R Powley, Yefim Brun
  • Publication number: 20180237816
    Abstract: Compositions are disclosed herein comprising at least one dextran ether compound that comprises uncharged, anionic, and/or cationic organic groups. The degree of substitution of one or more dextran ether compounds is about 0.0025 to about 3.0. Dextran from which the disclosed ether compounds can be derived can have a weight-average molecular weight of about 50-200 million Daltons and/or a z-average radius of gyration of about 200-280 nm. Also disclosed are methods of producing dextran ether compounds, as well as methods of using these ether compounds in various applications.
    Type: Application
    Filed: March 28, 2016
    Publication date: August 23, 2018
    Inventors: Jayme L. Paullin, Rakesh Nambiar
  • Publication number: 20180229214
    Abstract: Compositions are disclosed herein comprising poly alpha-1,3-glucan or poly alpha-1,3-1,6-glucan polymer having an open-cell pore structure with an average pore size of about 100 nm to about 3000 nm in diameter. Such polymers have enhanced aqueous liquid absorption capacity, and can be comprised in various products having aqueous liquid absorption function. Methods of preparing glucan polymers of the compositions provided herein are also disclosed.
    Type: Application
    Filed: April 13, 2018
    Publication date: August 16, 2018
    Inventors: Natnael Behabtu, Rakesh Nambiar
  • Patent number: 10005850
    Abstract: A hydrocolloid or aqueous solution comprising a poly alpha-1,3-glucan ether compound is disclosed having a viscosity of at least about 10 centipoise (cPs). The poly alpha-1,3-glucan ether compound in these compositions has a degree of substitution of about 0.05 to about 3.0. Also disclosed is a method for increasing the viscosity of a hydrocolloid or aqueous composition using a poly alpha-1,3-glucan ether compound.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: June 26, 2018
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Rahul B. Kasat, Jayme L. Paullin, Andrea M. Perticone, T. Joseph Dennes, Rakesh Nambiar, Michael W. Cobb
  • Publication number: 20180155455
    Abstract: Poly alpha-1,3-glucan ester compounds are disclosed herein with a degree of substitution of about 0.001 to about 3.0. Also disclosed are methods of producing poly alpha-1,3-glucan ester compounds using cyclic organic anhydrides.
    Type: Application
    Filed: June 23, 2016
    Publication date: June 7, 2018
    Inventors: Jayme L. Paullin, Rakesh Nambiar, Christian Peter Lenges
  • Patent number: 9968910
    Abstract: Compositions are disclosed herein comprising poly alpha-1,3-glucan or poly alpha-1,3-1,6-glucan polymer having an open-cell pore structure with an average pore size of about 100 nm to about 3000 nm in diameter. Such polymers have enhanced aqueous liquid absorption capacity, and can be comprised in various products having aqueous liquid absorption function. Methods of preparing glucan polymers of the compositions provided herein are also disclosed.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: May 15, 2018
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Natnael Behabtu, Rakesh Nambiar
  • Publication number: 20180127682
    Abstract: Polysaccharides can be used to provide a liquid composition with desirable rheological properties while being compatible with other ingredients, such as enzymes, that may be used in formulating the liquid composition. The polysaccharides can be i) a colloidal dispersion of poly alpha-1,3-glucan, ii) poly alpha-1,3-glucan fibrids, iii) soy polysaccharide; or iv) a combination thereof.
    Type: Application
    Filed: May 19, 2016
    Publication date: May 10, 2018
    Inventors: Rakesh Nambiar, Jayme L. Paullin, Ji Yeon Huh, Natnael Behabtu
  • Patent number: 9926541
    Abstract: Compositions are disclosed herein comprising poly alpha-1,3-1,6-glucan with a weight average degree of polymerization (DPw) of at least 1000. This glucan polymer comprises at least 30% alpha-1,3 linkages and at least 30% alpha-1,6 linkages. Further disclosed are glucosyltransferase enzymes that synthesize poly alpha-1,3-1,6-glucan. Ether derivatives of poly alpha-1,3-1,6-glucan and methods of using such derivatives as viscosity modifiers are also disclosed.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: March 27, 2018
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Jayme L Paullin, Mark S Payne, T Joseph Dennes, Yefim Brun, Rakesh Nambiar, Thomas Scholz
  • Publication number: 20180079832
    Abstract: Compositions comprising oxidized soy polysaccharide compounds are disclosed herein. Oxidized soy polysaccharide compounds are produced by contacting soy polysaccharide under aqueous conditions with at least one N-oxoammonium salt, periodate compound, and/or peroxide compound.
    Type: Application
    Filed: March 28, 2016
    Publication date: March 22, 2018
    Inventors: Jayme L. Paullin, Rakesh Nambiar, Tam H. Tran, Brian C. Pierce
  • Publication number: 20180022834
    Abstract: Compositions comprising oxidized dextran compounds are disclosed herein. Oxidized dextran compounds are produced by contacting dextran under aqueous conditions with at least one N-oxoammonium salt, at least one periodate compound, and/or at least one peroxide compound.
    Type: Application
    Filed: March 28, 2016
    Publication date: January 25, 2018
    Inventors: Jayme L. Paullin, Rakesh Nambiar
  • Publication number: 20180021238
    Abstract: A colloidal dispersion is disclosed comprising poly alpha-1,3-glucan or poly alpha-1,3-1,6-glucan and a solvent. The colloidal dispersion has utility in various applications, including food, oil field, pharmaceutical, personal care and specialty industries.
    Type: Application
    Filed: February 2, 2016
    Publication date: January 25, 2018
    Inventors: Ji Yeon Huh, Natnael Behabtu, Rakesh Nambiar
  • Publication number: 20170267787
    Abstract: Compositions comprising oxidized poly alpha-1,3-glucan compounds are disclosed herein. Oxidized poly alpha-1,3-glucan compounds are produced by contacting poly alpha-1,3-glucan under aqueous conditions with at least one N-oxoammonium salt.
    Type: Application
    Filed: June 1, 2017
    Publication date: September 21, 2017
    Inventors: RAKESH NAMBIAR, JAYME L. PAULLIN, ANDREA M. PERTICONE, T. JOSEPH DENNES