Patents by Inventor Michael Stephen Wolfe

Michael Stephen Wolfe 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: 10403770
    Abstract: A conductive paste composition comprises (i) an inorganic powder comprising at least a conductive powder, (ii) at least one microgel polymer, and (iii) a solvent. The paste composition may be used in a process for manufacturing an electrical device comprising: preparing a substrate; applying the conductive paste onto the substrate in a preselected pattern; and heating the applied conductive paste to form a conductive structure that provides an electrode for connecting the device. The paste composition beneficially permits the formation of narrow, high aspect ratio features in the conductive structure.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: September 3, 2019
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Michael Stephen Wolfe, John Donald Summers, Bryan Benedict Sauer, Hoang Vi Tran, Brian D Mather, Hee Hyun Lee, Esther Kim, Ma Helen Cativo, Yuefei Tao
  • Patent number: 10370549
    Abstract: This invention pertains to aqueous inkjet inks containing self-dispersing pigments. The self-dispersing pigments are modified with multivalent cations.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: August 6, 2019
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Michael Stephen Wolfe, Michael J. Eiseman, Loretta L. Tam, Cullen Kirkpatrick
  • Patent number: 10351708
    Abstract: This invention pertains to self-dispersing pigment dispersions. The self-dispersing pigments are modified with a multivalent cation and an anionic polymer.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: July 16, 2019
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Michael Stephen Wolfe, Charles T. Berge, Loretta L. Tam, Cullen Kirkpatrick
  • Publication number: 20190154345
    Abstract: A heat exchanger and heat exchanger core are provided. The heat exchanger core includes a plurality of columnar passages extending between an inlet plenum of the heat exchanger core and an outlet plenum of the heat exchanger core, the columnar passages formed monolithically in a single fabrication process.
    Type: Application
    Filed: November 17, 2017
    Publication date: May 23, 2019
    Inventors: Ramon Martinez, Nicolas Kristopher Sabo, Curt Edward Hogan, Michael Stephen Popp, Jeffrey Douglas Rambo, Jared Matthew Wolfe
  • Publication number: 20190100641
    Abstract: This disclosure relates to a fine silver particle dispersion comprising: (i) 60 to 95 wt. % of fine silver particles, wherein particle diameter (D50) of the fine silver particles is 50 to 300 nm, (ii) 4.5 to 39 wt. % of a solvent; and (iii) 0.1 to 3 wt. % of a resin, wherein the glass transition temperature (Tg) of the resin is 70 to 300° C., wherein the weight percentages are based on the weight of the fine silver particle dispersion.
    Type: Application
    Filed: October 4, 2017
    Publication date: April 4, 2019
    Applicant: DOWA ELECTRONICS MATERIALS CO., LTD.
    Inventors: Shingo TERAGAWA, Takashi HINOTSU, Dave HUI, Michael Stephen WOLFE, Howard David GLICKSMAN, Haixin YANG
  • Publication number: 20190103200
    Abstract: This disclosure relates to a method of manufacturing an electrically conductive thick film comprising steps of: (a) applying a fine silver particle dispersion on a substrate, wherein the fine silver particle dispersion comprises, (i) 60 to 95 wt. % of fine silver particles, wherein particle diameter (D50) of the fine silver particles is 50 to 300 nm, (ii) 4.5 to 39 wt. % of a solvent; and (iii) 0.1 to 3 wt. % of a resin, wherein the glass transition temperature (Tg) of the resin is 70 to 300° C., wherein the weight percentages are based on the weight of the fine silver particle dispersion; and (b) heating the applied fine silver particle dispersion at 80 to 1000° C.
    Type: Application
    Filed: October 4, 2017
    Publication date: April 4, 2019
    Inventors: Dave Hui, Michael Stephen Wolfe, Howard David Glicksman, Haixin Yang, Takashi Hinotsu, Shingo Teragawa
  • Publication number: 20180258590
    Abstract: The disclosure relates to a coating composition that can be applied to a substrate, especially a cellulose substrate. A layer of the coating composition applied to the substrate provides an excellent ink receptive layer and can be used as a coating on paper. The disclosure also relates to aqueous compositions and method for applying the layer of the coating composition onto the substrate.
    Type: Application
    Filed: October 24, 2016
    Publication date: September 13, 2018
    Inventors: Natnael Behabtu, Xiaoqing Li, Michael Stephen Wolfe
  • Publication number: 20180155560
    Abstract: This invention pertains to aqueous inkjet inks containing self-dispersing pigments. The self-dispersing pigments are modified with multivalent cations.
    Type: Application
    Filed: April 27, 2016
    Publication date: June 7, 2018
    Inventors: Michael Stephen Wolfe, Michael J. Eiseman, Loretta L. Tam, Cullen Kirkpatrick
  • Publication number: 20180134896
    Abstract: This invention pertains to self-dispersing pigment dispersions. The self-dispersing pigments are modified with a multivalent cation and an anionic polymer.
    Type: Application
    Filed: April 27, 2016
    Publication date: May 17, 2018
    Inventors: Michael Stephen WOLFE, Charles T. BERGE, Loretta L. TAM, Cullen KIRKPATRICK
  • Publication number: 20180132350
    Abstract: This invention is directed to substrates and articles utilizing these substrates that provide improved performance of printable electronics on polymer substrates. In particular, the improved substrates relate to polymer films and electrical conductors printed on them. Application of a thin polymeric coating to the polymer film provides the improved performance of the printed conductors.
    Type: Application
    Filed: November 7, 2017
    Publication date: May 10, 2018
    Inventors: MICHAEL STEPHEN WOLFE, H DAVID ROSENFELD, ROBIN KOBREN
  • Publication number: 20180102198
    Abstract: The present invention provides a thick-film paste composition for printing the front side of a solar cell device having one or more insulating layers. The thick-film paste comprises an electrically conductive metal and an oxide composition dispersed in an organic medium that includes microgel particles and an organopolysiloxane.
    Type: Application
    Filed: September 25, 2017
    Publication date: April 12, 2018
    Inventors: Hoang VI Tran, Hee Hyun Lee, Michael Stephen Wolfe
  • Publication number: 20170362453
    Abstract: The present disclosure provides an ink for inkjet printing. The inkjet ink comprises a carbon black pigment dispersion. The carbon black pigment in the dispersion has low oil absorption.
    Type: Application
    Filed: December 8, 2015
    Publication date: December 21, 2017
    Inventors: Waifong Liew Anton, Michael Stephen Wolfe, Anthony W. Kluth
  • Patent number: 9410010
    Abstract: The present invention relates to urea-terminated polyurethanes dispersants based on diols and polyether diols, aqueous dispersions of such polyurethanes, the manufacture of the urea terminated polyurethane dispersions and inks containing pigments and/or disperse dyes dispersed with these urea terminated polyurethane dispersants. The urea termination can have nonionic hydrophilic substituents.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: August 9, 2016
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: C. Chad Roberts, Patrick F. McIntyre, Michael Stephen Wolfe, Xiaoqing Li, Hari Babu Sunkara
  • Publication number: 20160225925
    Abstract: A conductive paste composition comprises (i) an inorganic powder comprising at least a conductive powder, (ii) at least one microgel polymer, and (iii) a solvent. The paste composition may be used in a process for manufacturing an electrical device comprising: preparing a substrate; applying the conductive paste onto the substrate in a preselected pattern; and heating the applied conductive paste to form a conductive structure that provides an electrode for connecting the device. The paste composition beneficially permits the formation of narrow, high aspect ratio features in the conductive structure.
    Type: Application
    Filed: February 4, 2016
    Publication date: August 4, 2016
    Inventors: MICHAEL STEPHEN WOLFE, JOHN DONALD SUMMERS, BRYAN BENEDICT SAUER, HOANG VI TRAN, BRIAN D MATHER, HEE HYUN LEE, ESTHER KIM, MA HELEN CATIVO, YUEFEI TAO
  • Patent number: 9200170
    Abstract: The present disclosure provides an inkjet ink comprising an aqueous vehicle and an encapsulated pigment dispersion. A process for encapsulating pigment dispersions is provided where a pigment is dispersed with a polymeric dispersant in an aqueous solvent system. The free polymer dispersant in the pigment dispersion is limited to less than 0.12 grams per gram of pigment. This dispersed pigment is then encapsulated by adding acrylate monomers and optionally acrylic and vinyl monomers and polymerizing. In the encapsulated pigment dispersion the weight ratio of final free polymer to polymer found to the final encapsulated pigment is less than 0.9. The free polymer dispersant is measured by a centrifugation method and the final free polymer is measured by a density gradient centrifugation method. Such encapsulated pigment dispersions may be used in inkjet inks and are stable to heat, aging test conditions, and solvent challenges. Prints from these inks have better durability.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: December 1, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Hee Hyun Lee, Michael Joseph Otley, Michael Stephen Wolfe, Tristan Williams
  • Publication number: 20150175824
    Abstract: The present disclosure provides an ink for inkjet printing. The ink contains an aqueous vehicle, a pigment and an effective amount of an additive to reduce bronzing. The additive contains a nano-sized uncolored dispersed particle with a refractive index of greater than 1.5.
    Type: Application
    Filed: December 9, 2014
    Publication date: June 25, 2015
    Inventor: MICHAEL STEPHEN WOLFE
  • Patent number: 8957134
    Abstract: A process for encapsulating pigment dispersions is provided where a pigment is dispersed with a polymeric dispersant in an aqueous solvent system. The free polymer dispersant in the pigment dispersion is limited to less than 0.12 grams per gram of pigment. This dispersed pigment is then encapsulated by adding acrylate monomers and optionally acrylic and vinyl monomers and polymerizing. In the encapsulated pigment dispersion the weight ratio of final free polymer to polymer found to the final encapsulated pigment is less than 0.9. The free polymer dispersant is measured by a centrifugation method and the final free polymer is measured by a density gradient centrifugation method. Such encapsulated pigment dispersions may be used in inkjet inks and are stable to heat, aging test conditions, and solvent challenges. Prints from these inks have better durability.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: February 17, 2015
    Assignee: E I du Pont de Nemours and Company
    Inventors: Hee Hyun Lee, Michael Joseph Otley, Michael Stephen Wolfe, Tristan Williams
  • Patent number: 8912249
    Abstract: A process for encapsulating pigment dispersions is provided where a pigment is dispersed with a polymeric dispersant in an aqueous solvent system. An acrylate monomer and a polyurethane dispersion are added and the resultant mixture is polymerized. Optionally, the acrylate monomer/polyurethane mixture may be emulsified in water with an added surfactant or polymeric dispersant and up to 20% acrylic or other vinyl monomers based on the acrylate may be added to the acrylate monomer/polyurethane mixture before polymerization. Such encapsulated pigment dispersions may be used in inkjet inks and are stable to heat, aging test conditions, and solvent challenges. Prints from these inks have better durability.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: December 16, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Waifong Liew Anton, Hee Hyun Lee, Michael Joseph Otley, Michael Stephen Wolfe
  • Patent number: 8888264
    Abstract: A process for preparing dispersions of particles, especially aqueous dispersions is described. The process relates to a dispersion process where a polar solvent is added during the dispersion process such that the hydrogen bonding solubility parameter component, ?h, of the initial dispersion mixture increases at least 1.5 units. When the polar solvent added is water the dispersion process is called a Solvent-to-Water Process.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: November 18, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Harry Joseph Spinelli, Tristan Williams, Michael Stephen Wolfe, Howard Zakheim
  • Patent number: 8859644
    Abstract: Processes for encapsulating pigment dispersions is described and are used in inkjet inks providing stability with regard to heat aging test conditions and solvent challenges. Prints from these inks have better durability than prints made from dispersions that are not encapsulated.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: October 14, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Michael Stephen Wolfe, Waifong Liew Anton, Hee Hyun Lee