Patents by Inventor Joseph C. Duddy

Joseph C. Duddy 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).

  • Method of preparing a battery paste containing fibrous polyfluoroethylene for use in the plates of a lead-acid storage battery
    Patent number: 4315829
    Abstract: A method of preparing a battery paste for a lead-acid storage battery comprising: (a) mixing a water dispersion of polyfluoroethylene with lead material, (b) adding an aqueous solution of sulfuric acid to the lead material-dispersion mix and mixing to form a paste having fibrillation developed therein, (c) controlling the amount of fibrillation developed in the paste, and (d) controlling the paste density for use in a battery plate. The method provides an improved paste which permits substantial reduction in plate weights and density and loss of active material in the grid structure due to plate shedding over a conventional lead-acid paste. The saving in active material ranges from 10 to 30% over a conventional lead-acid paste without reduction in battery performance.
    Type: Grant
    Filed: January 27, 1978
    Date of Patent: February 16, 1982
    Assignee: Exide Corporation
    Inventors: Joseph C. Duddy, Francis P. Malaspina, William J. Martini
  • Method for making storage battery grid from lead-tin-zinc alloy
    Patent number: 4109358
    Abstract: A unique alloy comprising lead with small additions of zinc and tin is used to make grids for lead acid cells. The alloy as produced is softer than is desirable. It is hardened by mechanical working. When properly worked, it has a strength and stiffness approaching that of other low alloy lead materials currently in use as storage battery grids.
    Type: Grant
    Filed: April 22, 1977
    Date of Patent: August 29, 1978
    Assignee: ESB Ray-O-Vac Management Corporation
    Inventors: Joseph C. Duddy, Edward R. Hein
  • Lead base alloy for use in a storage battery grid
    Patent number: 4035556
    Abstract: A unique alloy comprising lead with small additions of zinc and tin is used to make grids for lead acid cells. The alloy as produced is softer than is desirable. It is hardened by mechanical working. When properly worked, it has a strength and stiffness approaching that of other low alloy lead materials currently in use as storage battery grids.
    Type: Grant
    Filed: April 7, 1972
    Date of Patent: July 12, 1977
    Assignee: ESB Incorporated
    Inventors: Joseph C. Duddy, Edward R. Hein