Patents by Inventor Thomas F. Uhlemann

Thomas F. Uhlemann 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: 6180286
    Abstract: A lead-acid cell or battery includes positive plates made from a lead-based alloy containing calcium, tin, and silver in amounts selected based upon the type of application and the plate fabrication method utilized, starting, lighting and ignition battery grids being directly cast and having calcium present in an amount of 0.03% to 0.050%, tin in an amount of 0.65% to 1.25%, and silver in an amount of from 0.018% to 0.030%, and the grids used in sealed, lead-acid cells comprising, when made by gravity casting, from about 0.035% to 0.055% calcium, 0.95% to 1.45% tin, and 0.018% to 0.030% silver, and, when made by continuous strip casting, calcium in the range of from 0.030% to 0.050%, tin in the range of from 0.95% to 1.25%, and silver in the range of from 0.017% to 0.030%, all of the alloy percentages being based upon the total weight of the grid.
    Type: Grant
    Filed: September 16, 1998
    Date of Patent: January 30, 2001
    Assignee: GNB Technologies, Inc.
    Inventors: Purushothama Rao, Thomas F. Uhlemann
  • Patent number: 5874186
    Abstract: A lead-acid cell or battery includes positive plates made from a lead-based alloy containing calcium, tin, and silver in amounts selected based upon the type of application and the plate fabrication method utilized, starting, lighting and ignition battery grids being directly cast and having calcium present in an amount of 0.03% to 0.050%, tin in an amount of 0.65% to 1.25%, and silver in an amount of from 0.018% to 0.030%, and the grids used in sealed, lead-acid cells comprising, when made by gravity casting, from about 0.035% to 0.055% calcium, 0.95% to 1.45% tin, and 0.018% to 0.030% silver, and, when made by continuous strip casting, calcium in the range of from 0.030% to 0.050%, tin in the range of from 0.95% to 1.25%, and silver in the range of from 0.017% to 0.030%, all of the alloy percentages being based upon the total weight of the grid.
    Type: Grant
    Filed: June 11, 1997
    Date of Patent: February 23, 1999
    Assignee: GNB Technologies, Inc.
    Inventors: Purushothama Rao, Thomas F. Uhlemann
  • Patent number: 5691087
    Abstract: A sealed lead-acid cell or battery includes positive plates made from an alloy consisting essentially of lead, from about 0.025% to about 0.06% calcium, from about 0.3% to about 0.9% tin, and from about 0.015% to about 0.045% silver.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: November 25, 1997
    Assignee: GNB Technologies, Inc.
    Inventors: Purushothama Rao, Thomas F. Uhlemann
  • Patent number: 5569552
    Abstract: A lead-acid storage battery for starting, lighting and ignition applications is disclosed which minimizes convection-induced, heat transfer from the vehicle underhood environment surrounding the battery to the battery itself and comprises an injection-molded, integral plastic container, or a two-piece container, having a multi-wall configuration in which an inner container includes the cell elements of the battery and at least one outer container spaced from the inner container provides at least one fluid compartment for allowing fluid flow through the fluid compartment to achieve the desired thermal regulation, the fluid flow path being created by a series of spaced fluid baffles.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: October 29, 1996
    Assignee: GNB Technologies, Inc.
    Inventors: Purushothama Rao, Thomas F. Uhlemann, William H. Kump
  • Patent number: 5460900
    Abstract: A lead-acid storage battery for starting, lighting and ignition applications is disclosed which minimizes convection-induced, heat transfer from the vehicle underhood environment surrounding the battery to the battery itself and comprises an injection-molded, integral plastic container having a multi-wall configuration in which an inner container includes the cell elements of the battery and at least one outer container spaced from the inner container provides at least one fluid compartment for allowing fluid flow through the fluid compartment to achieve the desired thermal regulation, the fluid flow path being created by a series of spaced fluid baffles.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: October 24, 1995
    Assignee: GNB Battery Technologies Inc.
    Inventors: Purushothama Rao, Thomas F. Uhlemann, William H. Kump
  • Patent number: 5434025
    Abstract: A continuous method for making starting, lighting and ignition lead-acid battery positive plates and the resulting battery is disclosed which utilizes a direct cast alloy strip wherein the alloy consists essentially of lead, from about 0.02 to 0.05% calcium, from about 0.3 to about 0.5% tin, and from about 0.02 to 0.05% silver, the percentages being based upon the weight of the alloy strip, as well as related alloys utilizing calcium and strontium or strontium in place of calcium.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: July 18, 1995
    Assignee: GNB Battery Technologies Inc.
    Inventors: Purushothama Rao, Thomas F. Uhlemann, John Larson, Steven R. Larsen