Patents by Inventor Steven R. Larsen

Steven R. Larsen 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: 5709967
    Abstract: Disclosed are curable sealant compositions for coating a conductive bushing for a lead-acid cell or battery having positive and negative plates disposed within a container and a cover, the conductive bushing being molded into the cover and providing electrical communication with at least one of the plates, the bushing presenting an interface with the exterior of the bushing and the cover. The sealant compositions comprise a sealing elastomer in an amount from about 1% to about 15% by weight and a solvent in an amount of up to about 99% by weight. In accordance with the invention, the sealant composition is a terpene solvent, preferably a cyclic terpene and more preferably D-limonene. The sealant compositions preferably further comprise a reinforcing agent in an amount of about 1% to about 15% by weight. In use, at least a portion of a bushing is coated with the sealant composition, and the sealant composition is cured.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: January 20, 1998
    Assignee: GNB Technologies, Inc.
    Inventor: Steven R. Larsen
  • Patent number: 5650242
    Abstract: Automotive SLI lead-acid batteries are disclosed which are characterized by enhanced resistance to intercell connection corrosion, even when exposed to the relatively high under-the-hood service temperatures in use with recent model automobiles. The straps are formed from a lead-based alloy including from about 2.0 to 2.6% or so antimony, from about 0.04 to 0.07% tin, from about 0.04 to about 0.07% arsenic, and from about 0.012 to about 0.030% selenium, the percentages being based upon the weight of the alloy.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: July 22, 1997
    Assignee: GNB Technologies, Inc.
    Inventors: Purushothama Rao, Steven R. Larsen
  • 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
  • Patent number: 5169734
    Abstract: Automotive SLI lead-acid batteries are disclosed which are characterized by enhanced resistance to intercell connection corrosion, even when exposed to the current, relatively high under-the-hood service temperatures in use with recent model automobiles. The straps are formed from a lead-based alloy including from about 3.0 to 3.3% antimony, from about 0.04 to 0.07% tin, from about 0.04 to 0.07% arsenic and from about 0.014 to 0.020% selenium, the percentages being based upon the weight of the alloy.
    Type: Grant
    Filed: March 26, 1991
    Date of Patent: December 8, 1992
    Assignee: GNB Incorporated
    Inventors: Purushothama Rao, Steven R. Larsen