Patents by Inventor Steven Dale Ittel

Steven Dale Ittel 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).

  • Patent number: 9129725
    Abstract: A paste composition contains an electrically conductive silver powder, one or more glass frits or fluxes, and a lithium compound dispersed in an organic medium. The paste is useful in forming an electrical contact on the front side of a solar cell device having an insulating layer. The lithium compound aids in establishing a low-resistance electrical contact between the front-side metallization and underlying semiconductor substrate during firing.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: September 8, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven Dale Ittel, Zhigang Rick Li, Kurt Richard Mikeska, Paul Douglas Vernooy
  • Patent number: 8894888
    Abstract: A conductive paste composition contains a source of an electrically conductive metal, a fusible material, a synthetic clay additive, and an optional etchant additive, dispersed in an organic medium. An article such as a photovoltaic cell is formed by a process having the steps of deposition of the paste composition on a semiconductor substrate by a process such as screen printing and firing the paste to remove the organic medium and sinter the metal and fusible material. The synthetic clay additive aids in establishing a low resistance electrical contact between the front side metallization and underlying semiconductor substrate during firing.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: November 25, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Steven Dale Ittel, John Graeme Pepin
  • Patent number: 8486308
    Abstract: A lead-free paste composition contains an electrically conductive silver powder, one or more glass frits or fluxes, and a lithium compound dispersed in an organic medium. The paste is useful in forming an electrical contact on the front side of a solar cell device having an insulating layer. The lithium compound aids in establishing a low-resistance electrical contact between the front-side metallization and underlying semiconductor substrate during firing.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: July 16, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Steven Dale Ittel, Zhigang Rick Li, Kurt Richard Mikeska, Paul Douglas Vernooy
  • Publication number: 20130161572
    Abstract: A conductive paste composition contains a source of an electrically conductive metal, a fusible material, a synthetic clay additive, and an optional etchant additive, dispersed in an organic medium. An article such as a photovoltaic cell is formed by a process having the steps of deposition of the paste composition on a semiconductor substrate by a process such as screen printing and firing the paste to remove the organic medium and sinter the metal and fusible material. The synthetic clay additive aids in establishing a low resistance electrical contact between the front side metallization and underlying semiconductor substrate during firing.
    Type: Application
    Filed: December 21, 2011
    Publication date: June 27, 2013
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven Dale Ittel, John Graeme Pepin
  • Patent number: 8414757
    Abstract: The disclosure relates to processes for the electrochemical modification of electron emitting materials such as carbon nanotubes. The processes improve the oxidation resistance of the electron emitting materials when they are fired in an oxygen-containing atmosphere such as air. The disclosure also relates to the preparation of cathodes or cathode assemblies, for use in a field emission device, wherein are contained an electron field emitter made from such electron emitting material.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: April 9, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Steven Dale Ittel, Gillian Althea Maria Reynolds, Ming Zheng
  • Patent number: 8367551
    Abstract: The present invention is directed to processes for printing compositions containing etchants or modifiers onto surfaces by spinning a filament from a viscoelastic polymer solution containing an etchant or modifier. The present invention also relates to viscoelastic compositions used in the printing processes, and devices made therefrom.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: February 5, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventor: Steven Dale Ittel
  • Publication number: 20130012675
    Abstract: A lubricant component is an oligomer of a series ?-olefins, made by forming a series of ?-olefins by oligomerization of ethylene using an ethylene oligomerization catalyst, and then oligomerizing the series of ?-olefins using a Lewis acid catalyst. The ?-olefin oligomer, which often has a high Viscosity Index, may be used for example in a lubricant as the base oil or a viscosity index modifier. The ?-olefin oligomer may also be a component of a lubricant additive, meant to be added to an already formulated lubricant to improve the lubricant's properties.
    Type: Application
    Filed: March 28, 2011
    Publication date: January 10, 2013
    Applicant: E.I. Dupont de Nemours and Company
    Inventor: Steven Dale Ittel
  • Publication number: 20130000714
    Abstract: A paste composition contains an electrically conductive silver powder, one or more glass frits or fluxes, and a lithium compound dispersed in an organic medium. The paste is useful in forming an electrical contact on the front side of a solar cell device having an insulating layer. The lithium compound aids in establishing a low-resistance electrical contact between the front-side metallization and underlying semiconductor substrate during firing.
    Type: Application
    Filed: December 9, 2011
    Publication date: January 3, 2013
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: STEVEN DALE ITTEL, Zhigang Rick Li, Kurt Richard Mikeska, Paul Douglas Vernooy
  • Publication number: 20120313198
    Abstract: A lead-free paste composition contains an electrically conductive silver powder, one or more glass frits or fluxes, and a lithium compound dispersed in an organic medium. The paste is useful in forming an electrical contact on the front side of a solar cell device having an insulating layer. The lithium compound aids in establishing a low-resistance electrical contact between the front-side metallization and underlying semiconductor substrate during firing.
    Type: Application
    Filed: December 8, 2011
    Publication date: December 13, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven Dale Ittel, Zhigang Rick Li, Kurt Richard Mikeska, Paul Douglas Vernooy
  • Patent number: 8309376
    Abstract: There is provided a process for forming a contained second layer over a first layer. The process comprises forming the first layer having a first surface energy and then treating the first layer with a photocurable surface-active composition which is a fluorinated ester or fluorinated imide of an ?,?-unsaturated polyacid; exposing the photocurable surface-active composition patternwise with radiation resulting in exposed areas and unexposed areas; developing the photocurable surface-active composition to remove the unexposed areas resulting in a first layer having untreated portions in the unexposed areas and treated portions in the exposed areas, where the treated portions have a second surface energy that is lower than the first surface energy; and forming the second layer on the untreated portions of the first layer. There is also provided an organic electronic device made by the process.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: November 13, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Charles D. Lang, Paul Anthony Sant, Jerald Feldman, Steven Dale Ittel, Stephan James McLain
  • Patent number: 8252385
    Abstract: Processes for printing conductors, insulators, dielectrics, phosphors, emitters, and other elements containing elongated functional particles aligned along the axis of a spun fiber or film that can be for electronics and display applications are provided. Also provided are viscoelastic compositions used in the processes, and devices made therefrom.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: August 28, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Steven Dale Ittel, Jennifer Leigh White
  • Patent number: 8143326
    Abstract: The present invention is directed to viscoelastic compositions useful printing processes, and to devices using the compositions.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: March 27, 2012
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Steven Dale Ittel, Jeffrey G. Crawford
  • Patent number: 8022152
    Abstract: Ethylene and allyl- or vinylsilanes are efficiently copolymerized by certain late transition metal complexes containing selected bidentate or tridentate ligands. The resulting novel polymers may be crosslinked by moisture when vinylsilane contains groups bound to silicon which are hydrolyzable. The polymers are useful for wire coating, crosslinked foams, pipes, and other uses.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: September 20, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Steven Dale Ittel, Lynda Kaye Johnson, Lin Wang, Ying Wang, Elizabeth Forrester McCord, Catherine E. Radzewich, Stephan James McLain, Karl Jeffrey Sweetman, Alison Margaret Anne Bennett, Alex Sergey Ionkin, Rinaldo Soria Schiffino
  • Publication number: 20110092076
    Abstract: An apparatus and method for vapor phase deposition of a reactive surface area (RSA) material onto a substrate of an electronic device. The vapor phase deposition is conducted at ambient pressures in air, and provides capture of residual vapor to minimize environmental release of RSA and other constituents used in the processing.
    Type: Application
    Filed: May 19, 2009
    Publication date: April 21, 2011
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Charles D. Lang, James Daniel Tremel, Paul Anthony Sant, Stephen Sorich, David K. Flattery, Gary A. Johansson, Jerald Feldman, Steven Dale Ittel, George Simpson
  • 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
  • Publication number: 20110073010
    Abstract: Processes are provided for removing metal-based catalyst residues from carbon nanotubes by contacting the carbon nanotubes with an active metal agent and carbon monoxide.
    Type: Application
    Filed: December 2, 2010
    Publication date: March 31, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventor: Steven Dale Ittel
  • Patent number: 7868333
    Abstract: Processes are provided for removing metal-based catalyst residues from carbon nanotubes by contacting the carbon nanotubes with an active metal agent and carbon monoxide.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: January 11, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Steven Dale Ittel
  • Publication number: 20100288980
    Abstract: This invention relates to a composition comprising carbon nanotubes and a protective material that protects the carbon nanotubes from damage or degradation such as by oxidation upon exposure to high temperature.
    Type: Application
    Filed: November 14, 2008
    Publication date: November 18, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventor: Steven Dale Ittel
  • Patent number: 7816467
    Abstract: Processes for forming adducts of hydrazines with acrylic macromonomers are provided. Also provided are processes for using ring-closing reactions of the adducts to form aminolactams. The adducts are useful, for example, for making adhesives, surfactants, viscosity modifiers, processing aids, and other products.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: October 19, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Steven Dale Ittel, Alexei A. Gridnev
  • Patent number: 7803881
    Abstract: Processes for forming adducts of amines with acrylic macromonomers are provided. Also provided are processes for using ring-closing reactions of the adducts to form lactams. The adducts are useful, for example, for making adhesives, surfactants, viscosity modifiers, processing aids, and other products.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: September 28, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Steven Dale Ittel, Alexei A. Gridnev, Jennifer W. Anderson