Patents by Inventor Steven B. Walker

Steven B. Walker 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).

  • Ink composition for making a conductive silver structure
    Patent number: 9469773
    Abstract: An ink composition for making a conductive silver structure comprises a silver salt and a complex of (a) a complexing agent and a short chain carboxylic acid or (b) a complexing agent and a salt of a short chain carboxylic acid, according to one embodiment. A method for making a silver structure entails combining a silver salt and a complexing agent, and then adding a short chain carboxylic acid or a salt of the short chain carboxylic acid to the combined silver salt and a complexing agent to form an ink composition. A concentration of the complexing agent in the ink composition is reduced to form a concentrated formulation, and the silver salt is reduced to form a conductive silver structure, where the concentrated formulation and the conductive silver structure are formed at a temperature of about 120° C. or less.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: October 18, 2016
    Assignee: The Board of Trustees of The University of Illinois
    Inventors: Steven B. Walker, Jennifer A. Lewis
  • INK COMPOSITION FOR MAKING A CONDUCTIVE SILVER STRUCTURE
    Publication number: 20150004325
    Abstract: An ink composition for making a conductive silver structure comprises a silver salt and a complex of (a) a complexing agent and a short chain carboxylic acid or (b) a complexing agent and a salt of a short chain carboxylic acid, according to one embodiment. A method for making a silver structure entails combining a silver salt and a complexing agent, and then adding a short chain carboxylic acid or a salt of the short chain carboxylic acid to the combined silver salt and a complexing agent to form an ink composition. A concentration of the complexing agent in the ink composition is reduced to form a concentrated formulation, and the silver salt is reduced to form a conductive silver structure, where the concentrated formulation and the conductive silver structure are formed at a temperature of about 120° C. or less.
    Type: Application
    Filed: December 20, 2012
    Publication date: January 1, 2015
    Inventors: Steven B. Walker, Jennifer A. Lewis