Patents by Inventor Hari Babu Sunkara

Hari Babu Sunkara 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).

  • LUBRICATION OIL COMPOSITIONS
    Publication number: 20120004152
    Abstract: Provided are lubrication oil compositions. The compositions contain certain acid esters (monoesters and/or diesters) of polytrimethylene ether glycol, certain additives, and optionally a polytrimethylene ether glycol, and the use of such compositions as lubrication oils.
    Type: Application
    Filed: December 21, 2010
    Publication date: January 5, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Matthew Arthur Page, Hari Babu Sunkara, Kanthi S. Wijesekera
  • METHODS AND COMPOSITIONS FOR EXTRACTING FLAVOR AND FRAGRANCE COMPOUNDS AND SOLUBILIZING ESSENTIAL OILS
    Publication number: 20110274630
    Abstract: Provided are methods for extracting flavor and fragrance materials from natural plant materials, using poly(trimethylene ether) glycol homopolymers and copolymers. The poly(trimethylene ether) glycol homopolymers and copolymers act as solubilizers for essential oils, and can be used to provide compositions having a variety of uses in applications such as cosmetics, personal care products, and industrial cleaning products.
    Type: Application
    Filed: November 3, 2010
    Publication date: November 10, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Gyorgyi Fenyvesi, Raja Hari Poladi, Hari Babu Sunkara
  • Personal care compositions
    Patent number: 8029812
    Abstract: This invention relates to personal care compositions containing polytrimethylene ether glycol in a variety of physical forms including solutions, gels, oil-in-water emulsions, water-in-oil emulsions, suspensions and solids. In a particularly preferred embodiment, the polytrimethylene ether glycol is derived predominantly from monomers obtained from renewable resources, making the personal care products of this embodiment of the present invention more environmentally friendly in terms of their manufacture, use and disposal.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: October 4, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Hari Babu Sunkara
  • ANTIMICROBIAL COMPOSITIONS COMPRISING TRIMETHYLENE GLYCOL OLIGOMER AND METHODS OF USING THE COMPOSITIONS
    Publication number: 20110224307
    Abstract: Disclosed are antimicrobial compositions, and methods for killing, inhibiting, or preventing the growth of microbes, using trimethylene glycol oligomers or dimers. The trimethylene glycol oligomers and dimers have the formula R(CH2CH2CH2—O—CH2CH2CH2)nR1 where R and R1 are hydroxyl, amine, or ester functionalitiess, and n is 2 or higher.
    Type: Application
    Filed: March 14, 2011
    Publication date: September 15, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Gyorgyi Fenyvesi, Hari Babu Sunkara
  • WELLBORE FLUIDS COMPRISING POLY(TRIMETHYLENE ETHER) GLYCOL POLYMERS
    Publication number: 20110177981
    Abstract: Wellbore fluids containing poly(trimethylene ether)glycols are provided. The wellbore fluids can provide enhanced functionality, improved cost effectiveness, and reduced environmental impact as compared to conventional wellbore fluids.
    Type: Application
    Filed: March 30, 2011
    Publication date: July 21, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventor: Hari Babu Sunkara
  • METHODS FOR SYNTHESIZING POLYETHER DIOLS AND POLYESTER DIOLS
    Publication number: 20110172360
    Abstract: Processes for synthesizing polyether diols and polyester diols are provided. The processes include reacting diols and/or diacids in the presence of carbon black. The processes can be used to produce polymers of a variety of molecular weights.
    Type: Application
    Filed: July 16, 2010
    Publication date: July 14, 2011
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Edward Budi Muliawan, Hari Babu Sunkara, Tuyu Xie
  • Method for phase separation of polytrimethylene ether glycol in salt solution
    Publication number: 20110112331
    Abstract: Processes are provided for manufacturing polytrimethylene ether glycol, in which water is added to the product polymer to facilitate phase separation.
    Type: Application
    Filed: November 9, 2009
    Publication date: May 12, 2011
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Arthur William Etchells, Frederic Godbille, Hua Liang, Hari Babu Sunkara
  • METHODS FOR IMPROVING PHYSICAL PROPERTIES OF POLYESTERS
    Publication number: 20110105665
    Abstract: Methods and compositions for improving certain physical properties of polyesters are provided. The compositions are based on poly(trimethylene ether)glycol, and can improve properties such as toughness and flexibility in polyesters, providing a balance of desired properties.
    Type: Application
    Filed: November 5, 2009
    Publication date: May 5, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Paul M. Andrusyszyn, Hari Babu Sunkara
  • Electrical insulation fluids for use in electrical apparatus
    Patent number: 7919017
    Abstract: Insulation fluids comprising polytrimethylene ether glycol esters are provided. The insulation fluids can be used in electrical apparatuses.
    Type: Grant
    Filed: November 12, 2007
    Date of Patent: April 5, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Lisa C. Bates, Hari Babu Sunkara
  • Linear amine functionalized poly(trimethylene ether) compositions
    Patent number: 7919656
    Abstract: The present invention relates to linear amine-functionalized poly(trimethylene ether) compositions, and processes to produce these compositions.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: April 5, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Kai Qi, Hari Babu Sunkara
  • Poly(trimethylene-ethylene ether) glycols
    Patent number: 7893158
    Abstract: Block poly(trimethylene-ethylene ether) glycols are disclosed. The block poly(trimethylene-ethylene ether) glycols can be prepared by the polycondensation of 1,3-propanediol reactant and polyethylene glycol reactant. The block poly(trimethylene-ethylene ether) glycols can be used in breathable membranes, synthetic lubricants, hydraulic fluids, cutting oils, motor oils, surfactants, spin-finishes, water-borne coatings, laminates, adhesives, packaging, films and foams, fibers and fabrics.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: February 22, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Hari Babu Sunkara, Hiep Quang Do
  • METHODS FOR PREPARING POLYETHER ESTER ELASTOMER COMPOSITION
    Publication number: 20110021697
    Abstract: Disclosed are methods for preparing polyether ester elastomer compositions having polytrimethylene ether ester soft segments and polyethylene ester hard segments and containing a nucleating agent. Shaped articles can be made from the elastomer compositions, particularly molded articles, films and fibers.
    Type: Application
    Filed: October 6, 2010
    Publication date: January 27, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventor: Hari Babu Sunkara
  • ELECTRICAL INSULATION FLUIDS FOR USE IN ELECTRICAL APPARATUS
    Publication number: 20100308283
    Abstract: Insulation fluids comprising polytrimethylene ether glycol esters are provided. The insulation fluids can be used in electrical apparatuses.
    Type: Application
    Filed: August 20, 2010
    Publication date: December 9, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Lisa C. BATES, Hari Babu SUNKARA
  • POLYTRIMETHYLENE ETHER GLYCOL ESTERS
    Publication number: 20100261932
    Abstract: Disclosed are processes for making polytrimethylene ether glycol esters that are substantially free of residues from the catalyst used to produce the polytrimethylene ether glycol esters.
    Type: Application
    Filed: June 23, 2010
    Publication date: October 14, 2010
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Hari Babu Sunkara, Raja Hari Prasad R. Poladi, Gyorgyi Fenyvesi
  • Copolymers comprising trimethylene carbonate and poly(trimethylene ether) glycols
    Patent number: 7790834
    Abstract: The present invention relates to novel copolymers comprising unsubstituted or R-substituted trimethylene carbonate and poly(trimethylene ether)glycol. The copolymers find use in areas including personal care, coatings and lubricants.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: September 7, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert DiCosimo, Neville Everton Drysdale, Hari Babu Sunkara
  • Processes for the polymerization of trimethylene carbonate to poly(trimethylene glycol carbonate trimethylene glycol ether) diol
    Patent number: 7790833
    Abstract: This invention relates to solventless processes for the polymerization of an unsubstituted or substituted trimethylene carbonate to an unsubstituted or substituted poly(1,3-propanediol carbonate 1,3-propanediol ether)diol, using one or more solid acid catalysts.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: September 7, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Robert DiCosimo, Neville Everton Drysdale, Hari Babu Sunkara
  • Processes for reducing color in polytrimethylene ether glycol polymers
    Patent number: 7745668
    Abstract: Processes for reducing color in PO3G are provided. The processes include contacting PO3G with an activated carbon and then separating the PO3G from the activated carbon by, for example, filtration. The process provides PO3G having an APHA color less than that before contact with the absorbent. The processes are desirably used for polymers having a molecular weight of about 250 to about 5000.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: June 29, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Hari Babu Sunkara, Hiep Quang Do
  • LINEAR AMINE FUNCTIONALIZED POLY(TRIMETHYLENE ETHER) COMPOSITIONS
    Publication number: 20100160688
    Abstract: The present invention relates to linear amine-functionalized poly(trimethylene ether) compositions, and processes to produce these compositions.
    Type: Application
    Filed: December 23, 2008
    Publication date: June 24, 2010
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Kai Qi, Hari Babu Sunkara
  • LINEAR AMINE FUNCTIONALIZED POLY(TRIMETHYLENE ETHER) COMPOSITIONS
    Publication number: 20100160573
    Abstract: The present invention relates to linear amine-functionalized poly(trimethylene ether) compositions, and processes to produce these compositions.
    Type: Application
    Filed: February 12, 2010
    Publication date: June 24, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: KAI QI, HARI BABU SUNKARA
  • PROCESS FOR THE PRODUCTION OF ACRYLIC AND METHACRYLIC ESTERS OF POLY(TRIMETHYLENE ETHER) GLYCOL
    Publication number: 20100160672
    Abstract: Processes are provided for producing novel (meth)acrylic esters of poly(trimethylene ether) glycol. The processes include reacting poly(trimethylene ether) glycol with (meth)acrylic acid or equivalents thereof.
    Type: Application
    Filed: October 28, 2009
    Publication date: June 24, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Gyorgyi Fenyvesi, Raja Hari Poladi, Hari Babu Sunkara