Patents by Inventor Howard T. Sawhill

Howard T. Sawhill 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).

  • Low temperature fireable thick film silver paste
    Patent number: 8790550
    Abstract: The present invention is directed to an electroconductive thick film paste composition comprising Ag and a Pb-free bismuth-tellurium oxide both dispersed in an organic medium, wherein the paste is fireable at temperatures below 420° C. The paste is especially useful for forming electrodes on substrates such as glass or films, particularly electrochromic glass or films, that would be damaged by higher firing temperatures. The present invention is further directed to a device comprising an electrode formed from the paste composition and, in particular, to an electrochromic device comprising such an electrode.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: July 29, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Kenneth Warren Hang, Hena Pyada, Howard T Sawhill, Michael A. Skurski, Robert Paul Waldrop
  • LOW TEMPERATURE FIREABLE THICK FILM SILVER PASTE
    Publication number: 20120305859
    Abstract: The present invention is directed to an electroconductive thick film paste composition comprising Ag and a Ph-free Bi-based glass frit both dispersed in an organic medium, wherein the paste is fireable at temperatures below 420° C. The paste is especially useful for forming electrodes on substrates such as glass or films, particularly electrochromic glass or films, that would be damaged by higher firing temperatures. The present invention is further directed to a device comprising an electrode formed from the paste composition and, in particular, to an electrochromic device comprising such an electrode.
    Type: Application
    Filed: May 15, 2012
    Publication date: December 6, 2012
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Kenneth Warren Hang, Hena Pyada, Howard T. Sawhill, Michael A. Skurski, Robert Paul Waldrop
  • LOW TEMPERATURE FIREABLE THICK FILM SILVER PASTE
    Publication number: 20120305858
    Abstract: The present invention is directed to an electroconductive thick film paste composition comprising Ag and a Pb-free bismuth-tellurium oxide both dispersed in an organic medium, wherein the paste is fireable at temperatures below 420° C. The paste is especially useful for forming electrodes on substrates such as glass or films, particularly electrochromic glass or films, that would be damaged by higher firing temperatures. The present invention is further directed to a device comprising an electrode formed from the paste composition and, in particular, to an electrochromic device comprising such an electrode.
    Type: Application
    Filed: May 15, 2012
    Publication date: December 6, 2012
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: KENNETH WARREN HANG, HENA PYADA, HOWARD T. SAWHILL, MICHAEL A. SKURSKI, ROBERT PAUL WALDROP
  • Dielectric composition
    Patent number: 4849380
    Abstract: A composition for making low K dielectric layers which is an admixture of finely divided solids consisting essentially of (a) lead-free amorphous borosilicate glass containing Al.sub.2 O.sub.3, a mixture of oxides of alkali metals, alkaline earth metals or mixtures thereof containing Li.sub.2 O, and (b) a ceramic filler selected from mullite, mixtures of mullite with fused silica and mixtures of quartz with fused silica.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Howard T. Sawhill