Patents Represented by Attorney Gail D. Tanzer
  • Patent number: 7955684
    Abstract: The present invention relates to a multilayer protective enclosure for protecting humans, animals or perishables from hazardous agents in the environment. The enclosure contains a porous adaptive membrane structure that has movable membranes with insertable protrusions. The structure can be made to change its gas, liquid or particulate permeability in response to surrounding environmental conditions. Hence, the enclosure is highly breathable in a non-hazardous environment but impermeable or only semipermeable in a hazardous environment.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: June 7, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joseph D. Trentacosta, Vivek Kapur
  • Patent number: 7922940
    Abstract: This invention relates to the synthesis and isolation of colloidal silver particles through the use of thermomorphic polymers and the resulting composition. It further relates to the use of the resulting composition in the preparation of inks for printing with silver-containing inks.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: April 12, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Steven Dale Ittel
  • 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
  • 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
  • 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
  • Patent number: 7842626
    Abstract: Partially fluorinated amino acid derivatives are provided that are useful as organogelators and surface treatment materials to provide oil- and water- repellency properties to substrates. Also provided are composite materials comprising a porous support and a porous nanoweb. The porous nanoweb contains fibrous structures of about 10 nm to about 1000 nm effective average fiber diameter.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: November 30, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Erick Jose Acosta, Anilkumar Raghavanpillai, Sheng Peng, Stefan Reinartz
  • Patent number: 7829188
    Abstract: Epoxy compositions exhibiting low viscosity in the uncured state and low coefficient of thermal expansion in the cured state are provided. Also provided are processes for making the epoxy compositions. The low dielectric constant compositions are well-suited for use in multi-layer printed circuit boards. The desired properties are achieved by employment of a bimodal distribution of nano-scale fillers in the epoxy compositions.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: November 9, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Pui-Yan Lin, Govindasamy Paramasivam Rajendran, George Elias Zahr
  • 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
  • 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
  • Patent number: 7781761
    Abstract: Substituted anthracene compounds and electronic devices containing the substituted anthracene compounds are provided.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: August 24, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Hong Meng
  • Patent number: 7771919
    Abstract: Provided are liquid compositions suitable for use as immersion liquids in immersion lithography, and immersion lithography processes and apparatus using the compositions.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: August 10, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Alex Sergey Ionkin
  • 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
  • Patent number: 7737277
    Abstract: One embodiment of this invention is bis-cyclometalled electroluminescent complexes of iridium (III) according to Formula I. Another embodiment of this invention is electronic devices in which the active layer includes a bis-cyclometalled electroluminescent Ir(III) complex.
    Type: Grant
    Filed: May 8, 2006
    Date of Patent: June 15, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Alex Sergey Ionkin, William J. Marshall, Ying Wang, Viacheslav A. Petrov
  • Patent number: 7728175
    Abstract: The present invention relates to linear amine-functionalized poly(trimethylene ether) compositions, and processes to produce these compositions.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: June 1, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Kai Qi, Hari Babu Sunkara
  • Patent number: 7718997
    Abstract: Tetrasubstituted coronenes are provided. Also provided are electronic devices in which the active layer includes a tetrasubstituted coronene.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: May 18, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Alex Sergey Ionkin, Ying Wang
  • Patent number: 7714174
    Abstract: The present invention relates to a process for preparing lower-color polytrimethylene ether glycol, comprising contacting said polytrimethylene ether glycol, or its precursor reaction-mixture, with a hydride compound during at least one stage of the process of manufacture, or on the polytrimethylene ether glycol resulting form such process, such that the polytrimethylene ether glycol demonstrates a reduced color (as compared to using no hydride compound).
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: May 11, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Yanhui Niu, Zuohong Yin
  • Patent number: 7696264
    Abstract: Processes for preparing silicon-containing polytrimethylene homo- or copolyethers, wherein at least a portion of the polymer end groups are silicon-containing end groups, are provided.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: April 13, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Howard C. Ng
  • Patent number: 7691250
    Abstract: This invention provides membrane-mediated electropolishing (MMEP) processes for polishing and/or planarizing metal work pieces using topographically patterned membranes. The processes can be used for both pure metals and alloys, and provide advantages over conventional electropolishing processes and known MMEP processes using smooth membranes. This invention also provides a cathode half-cell and an apparatus useful in membrane-mediated electropolishing processes. The invention also provides processes for electroengraving and electromachining topographic patterns, holes and/or grooves into the surface of a metal work piece.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: April 6, 2010
    Assignee: E.I. Du Pont de Nemours and Company
    Inventors: Stephen Mazur, Charles E. Jackson, Gary W. Foggin
  • Patent number: 7678350
    Abstract: Provided are processes for the production of titanium dioxide from ilmenite. In these processes, ilmenite is digested with aqueous trimethylammonium hydrogen oxalate. Iron from the ilmenite precipitates as a hydrated iron oxalate and is removed by filtering, leaving a titanium-rich solution. The titanium-rich solution can be further processed to form titanium dioxide.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: March 16, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David Richard Corbin, Scott N. Hutchison
  • Patent number: 7671083
    Abstract: This invention provides phenylene-thiophene compounds that exhibit useful electronic properties such as high mobility and high on/off ratio. The invention also provides electronic devices incorporating these compounds. These devices include field effect transistors (FETs), thin film transistors (TFTs), display devices, light-emitting diodes, photovoltaic cells, photo-detectors, and memory cells. Further, the invention also describes a method for manufacturing these field effect transistors. The invention describes an electronic device comprising one or more compounds represented by Formula: (I) where R is selected from substituents comprising 1-20 carbon atoms, wherein the substituents are selected from substituted or unsubstituted alkyl groups, substituted or unsubstituted alkenyl groups, and substituted or unsubstituted alkynyl groups; n is an integer selected from 2 through 6; and m and m? are integers selected independently from 1 through 3.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: March 2, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Marc B. Goldfinger