Patents by Inventor Roberto Irizarry-Rivera

Roberto Irizarry-Rivera 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).

  • PROCESS FOR MAKING SILVER POWDER PARTICLES WITH VERY SMALL SIZE CRYSTALLITES
    Publication number: 20150266098
    Abstract: The process for making silver powder particles with very small size crystallites uses a combination of gum arabic and maleic acid with the reduction of a silver salt with ascorbic acid. Silver thick film paste containing these silver powder particles can be used in electronic applications to form electrodes for semiconductor devices and, in particular, solar cells.
    Type: Application
    Filed: May 22, 2015
    Publication date: September 24, 2015
    Inventors: ROBERTO IRIZARRY-RIVERA, HAIXIN YANG
  • DOUBLE JET PROCESS FOR PRODUCING NANOSILVER DISPERSIONS
    Publication number: 20140352497
    Abstract: This invention provides a double jet process to produce silver nanoparticles, the process comprising providing a double-jet system to form a reaction mixture in a reactor containing the reactor solution by adding a basic aqueous silver ammonia complex solution and a basic reducing solution to the reactor solution at the same controlled rate with a targeted pH profile for the reactor solution from acidic to basic determined by the addition rate and the initial pH of the reactor solution. Use of this process results in a dispersion comprised of silver nanoparticles that have a specific size and de-agglomeration level that is determined by the process conditions.
    Type: Application
    Filed: April 23, 2014
    Publication date: December 4, 2014
    Applicants: E I DU PONT DE NEMOURS AND COMPANY, CLARKSON UNIVERSITY
    Inventors: ROBERTO IRIZARRY-RIVERA, DANIEL V. GOIA, LU LU
  • PROCESS FOR MAKING SILVER POWDER PARTICLES WITH SMALL SIZE CRYSTALLITES
    Publication number: 20140196772
    Abstract: The process for making silver powder particles with small size crystallites uses a combination of gum arabic and maleic acid with the reduction of a silver salt with ascorbic acid, Silver thick film paste containing these silver powder particles can be used in electronic applications to form electrodes for semiconductor devices and, in particular, solar cells.
    Type: Application
    Filed: March 18, 2014
    Publication date: July 17, 2014
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: ROBERTO IRIZARRY-RIVERA, Haixin Yang
  • Process for making highly dispersible spherical silver powder particles and silver particles formed therefrom
    Patent number: 7648557
    Abstract: Disclosed is an improved process for making highly dispersible, spherical silver particles. In particular, the invention is directed to a process for making silver particles, which are very high solids and highly ordered. The silver particles formed are particularly useful in electronic applications.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: January 19, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Roberto Irizarry-Rivera, Howard David Glicksman, Victor M. Rivera Alvarado
  • Process for making highly dispersible spherical silver powder particles and silver particles formed therefrom
    Publication number: 20080028889
    Abstract: Disclosed is an improved process for making highly dispersible, spherical silver particles. In particular, the invention is directed to a process for making silver particles, which are very high solids and highly ordered. The silver particles formed are particularly useful in electronic applications.
    Type: Application
    Filed: May 31, 2007
    Publication date: February 7, 2008
    Inventors: Roberto Irizarry-Rivera, Howard Glicksman, Victor Alvarado