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).

  • Publication number: 20090092569
    Abstract: This invention relates to deodorant compositions containing polytrimethylene ether glycol homo- and copolymers and/or polytrimethylene glycol ester(s) in a variety of physical forms. In at least one embodiment, the polytrimethylene ether glycol homo- and copolymers and/or polytrimethylene glycol ester(s) are derived predominantly from monomers (e.g., 1,3-propanediol) obtained from renewable resources, and are thus more environmentally friendly in terms of manufacture, use and disposal.
    Type: Application
    Filed: October 9, 2007
    Publication date: April 9, 2009
    Inventors: Hari Babu Sunkara, Raja Hari Poladi
  • Publication number: 20090054283
    Abstract: This invention relates to lubrication oil compositions comprising (i) a base fluid stock comprising (a) a PO3G fluid (a polytrimethylene ether glycol that is a fluid at ambient temperature) and (b) a PO3G ester fluid (an ester of a polytrimethylene ether glycol that is a fluid at ambient temperature), and (ii) one or more fuel oil additives.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 26, 2009
    Applicant: E.I. duPont de Nemours and Company
    Inventors: Matthew Arthur Page, Hari Babu Sunkara, Kanthi S. Wijesekera
  • Publication number: 20090054280
    Abstract: This invention relates to compositions comprising (i) a base fluid stock comprising (a) a PTEEG fluid (a poly(trimethylene-ethylene ether)glycol that is a fluid at ambient temperature) and (b) an additive package comprising certain specified additive combinations, and lubrication oils containing the compositions.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 26, 2009
    Applicant: E.I. duPont de Nemours and Company
    Inventors: Hari Babu Sunkara, Kanthi S. Wijesekera
  • Publication number: 20090054282
    Abstract: This invention relates to lubrication oil compositions comprising (i) a base fluid stock comprising an acid ester of a polytrimethylene ether glycol that is a fluid at ambient temperature, and (ii) one or more lube oil additives.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 26, 2009
    Applicant: E.I. duPont de Nemours and Company
    Inventor: Hari Babu Sunkara
  • Publication number: 20090054284
    Abstract: This invention relates to lubrication oil compositions comprising (i) an acid ester (monoester and/or diester) of polytrimethylene ether glycol; and (ii) a vegetable oil lubricant.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 26, 2009
    Applicant: E. I. duPont de Nemours and Company
    Inventor: Hari Babu Sunkara
  • Patent number: 7476332
    Abstract: Heat transfer systems are provided. The heat transfer systems comprise an object in contact with a heat transfer fluid comprising (a) polytrimethylene homo- or copolyether glycol where from about 50 to 100 mole percent of the repeating units are trimethylene ether units, and (b) a blending component selected from the group consisting of ethylene glycol, diethylene glycol, polyalkylene glycol copolymers of ethylene oxide and propylene oxide, vegetable oils, aromatic compounds, mineral oil, silicone fluids, and mixtures thereof. Objects in contact with a heat transfer fluid in the heat transfer systems include automotive radiators, industrial heat exchangers, heat recovery units, refrigeration units, solar panels, cooling towers, transformers, and heating radiators.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: January 13, 2009
    Assignee: E.I. Du Pont De Nemours & Company
    Inventor: Hari Babu Sunkara
  • Patent number: 7476344
    Abstract: Electrical apparatuses and a method for their production, the apparatuses containing electrical insulation fluids comprising polytrimethylene homo- or copolyether glycol having a dielectric breakdown voltage greater than about 30 kV, wherein from about 50 to 100 mole percent of the repeating units of the polytrimethylene homo- or copolyether glycol are trimethylene ether units. An electrical insulation fluid comprising (a) polytrimethylene homo- or copolyether glycol having trimethylene ether units at about 50 to 100 mole percent of the repeating units and (b) a blending component selected from the group consisting of vegetable oils, mineral oil, poly alpha olefins, synthetic esters, and silicone fluids, and mixtures thereof, wherein the electrical insulation fluid has a dielectric breakdown voltage of greater than about 30 kV.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: January 13, 2009
    Assignee: E.I. Du Pont de Nemours
    Inventors: Hari Babu Sunkara, Ray W. Miller, Joseph V. Kurian
  • Publication number: 20080255300
    Abstract: Polytrimethylene ether ester elastomer flexible films are provided. The films have desirable physical properties, including tenacity, that enable their use in making robust packaging from relatively thin films.
    Type: Application
    Filed: June 20, 2008
    Publication date: October 16, 2008
    Applicant: E. I. duPont de Nemours and Company
    Inventors: Marc B. Goldfinger, Bryan Benedict Sauer, Hari Babu Sunkara
  • Publication number: 20080245993
    Abstract: Heat transfer systems are provided. The heat transfer systems comprise an object in contact with a heat transfer fluid comprising (a) polytrimethylene homo- or copolyether glycol where from about 50 to 100 mole percent of the repeating units are trimethylene ether units, and (b) a blending component selected from the group consisting of ethylene glycol, diethylene glycol, polyalkylene glycol copolymers of ethylene oxide and propylene oxide, vegetable oils, aromatic compounds, mineral oil, silicone fluids, and mixtures thereof. Objects in contact with a heat transfer fluid in the heat transfer systems include automotive radiators, industrial heat exchangers, heat recovery units, refrigeration units, solar panels, cooling towers, transformers, and heating radiators.
    Type: Application
    Filed: May 14, 2008
    Publication date: October 9, 2008
    Applicant: E. I. duPont de Nemours and Company
    Inventor: HARI BABU SUNKARA
  • Patent number: 7422795
    Abstract: Polytrimethylene ether ester elastomer flexible films are provided. The films have desirable physical properties, including tenacity, that enable their use in making robust packaging from relatively thin films.
    Type: Grant
    Filed: June 21, 2004
    Date of Patent: September 9, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Hari Babu Sunkara, Marc B. Goldfinger, Bryan B. Sauer
  • Patent number: 7413677
    Abstract: A process for transferring heat from a heat generating source to a heat transfer fluid, comprising contacting the heat generating source with a heat transfer fluid for a time sufficient to effect heat transfer between the source and the fluid, wherein the heat transfer fluid comprises polytrimethylene homo- or copolyether glycol where at least about 50 mole percent of the repeating units are trimethylene ether units. In preferred embodiments the polytrimethylene homo- or copolyether glycol is selected from the group consisting of (i) polytrimethylene ether glycol, (ii) poly(trimethylene-ethylene ether)glycol, and (iii) random polytrimethylene ether ester.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: August 19, 2008
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Hari Babu Sunkara
  • Publication number: 20080175875
    Abstract: This invention relates to cosmetic compositions containing aqueous nanodispersions of polyurethane ionomers based on polytrimethylene ether glycol (“PO3G”), and an active cosmetic ingredient. In a particularly preferred embodiment, the PO3G 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: Application
    Filed: September 21, 2007
    Publication date: July 24, 2008
    Inventor: Hari Babu Sunkara
  • Publication number: 20080177024
    Abstract: Processes for preparing random polytrimethylene ether ester are provided. The processes include contacting 1,3-propanediol with a suitable polymerization catalyst, wherein the 1,3-propanediol comprises about 10 microg/g or less peroxide compounds, based on the weight of 1,3-propanediol, and about 100 microg/g or less carbonyl compounds based on the weight of the 1,3-propanediol.
    Type: Application
    Filed: December 4, 2007
    Publication date: July 24, 2008
    Inventors: Howard C. Ng, Hari Babu Sunkara
  • Publication number: 20080143009
    Abstract: A bicomponent fiber wherein (a) the first component comprises from about 90 to 100 wt. % poly(trimethylene terephthalate) and (b) the second component is a polymer composition comprising (i) poly(trimethylene terephthalate) and (ii) polymer containing polyalkylene ether repeating units. Yarn, fiber, fabrics and carpets comprising the bicomponent fiber, as well as the process of making the bicomponent fiber, yarn, fabric, and carpet.
    Type: Application
    Filed: February 21, 2008
    Publication date: June 19, 2008
    Inventors: Joseph V. Kurian, Gyorgyi Fenyvesi, Hari Babu Sunkara
  • Patent number: 7388115
    Abstract: The present invention relates to a process of manufacture of polytrimethylene ether glycol, in which one or more inorganic compounds selected from alkali metal carbonates are utilized during certain purification steps to reduce phase separation time.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: June 17, 2008
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Hari Babu Sunkara, Howard C. Ng
  • Publication number: 20080135662
    Abstract: This invention relates to a method of melt-spinning a polyether ester thermoplastic elastomer under commercially viable conditions to produce an elastoester multifilament yarn, wherein the polyether ester thermoplastic elastomer is a polytrimethylene ether ester comprising a polytrimethylene ether dicarboxylate ester soft segment and hard segment selected from a trimethylene dicarboxylate ester and/or a tetramethylene dicarboxylate ester hard segment.
    Type: Application
    Filed: December 6, 2006
    Publication date: June 12, 2008
    Inventors: Jing C. Chang, Hari Babu Sunkara
  • Publication number: 20080108845
    Abstract: Disclosed are monocarboxylic acid esters (mono- and/or diesters) of polytrimethylene ether glycol that are substantially free of residues from the catalyst used to produce the polytrimethylene ether glycol esters, as well as methods for their preparation and end uses thereof.
    Type: Application
    Filed: November 7, 2006
    Publication date: May 8, 2008
    Inventors: Hari Babu Sunkara, Raja Hari Prasad R. Poladi, Gyorgyi Fenyvesi
  • Publication number: 20080103243
    Abstract: This invention relates to thermoplastic elastomer compositions comprising blends of polyether ester elastomers and crosslinkable poly(meth)acrylate rubbers, and the manufacture and use thereof in, for example, shaped or molded rubber articles.
    Type: Application
    Filed: October 31, 2006
    Publication date: May 1, 2008
    Inventors: Hari Babu Sunkara, Herbert Vernon Bendler
  • Publication number: 20080103217
    Abstract: Disclosed are 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 these compositions, particularly molded articles, films and fibers.
    Type: Application
    Filed: October 31, 2006
    Publication date: May 1, 2008
    Inventor: Hari Babu Sunkara
  • Patent number: 7357985
    Abstract: A bicomponent fiber wherein (a) the first component comprises from about 90 to 100 wt. % poly(trimethylene terephthalate) and (b) the second component is a polymer composition comprising (i) poly(trimethylene terephthalate) and (ii) polymer containing polyalkylene ether repeating units. Yarn, fiber, fabrics and carpets comprising the bicomponent fiber, as well as the process of making the bicomponent fiber, yarn, fabric, and carpet.
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: April 15, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Joseph V. Kurian, Gyorgyi Fenyvesi, Hari Babu Sunkara