Patents by Inventor Howard V. Leendersten

Howard V. Leendersten 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).

  • Bottle closure
    Patent number: 7426999
    Abstract: A bottle closure including a shell having an open first end, a closed second end, an inner wall and an outer wall, the combination forming conical space and a tapered core having a first end, a second end and conical surface positioned between the first end and second end wherein the tapered is located in the shell conical space.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: September 23, 2008
    Inventors: Howard V. Leendersten, Allen C. Shoup
  • Bottle closure
    Publication number: 20040169001
    Abstract: A bottle closure including a shell having an open first end, a closed second end, an inner wall and an outer wall, the combination forming conical space and a tapered core having a first end, a second end and conical surface positioned between the first end and second end wherein the tapered is located in the shell conical space.
    Type: Application
    Filed: October 14, 2003
    Publication date: September 2, 2004
    Inventors: Howard V. Leendersten, Allen C. Shoup
  • Internal combustion engine preparation composition
    Patent number: 5641729
    Abstract: A composition and method for pretreating the internal metal surfaces an internal combustion engine to remove varnish and to neutralize zinc dialkyldithiophosphate in order to provide for maximum bonding of a fluoropolymer with the surfaces of the internal combustion engine, the composition including tripropylene glycol methyl ether.
    Type: Grant
    Filed: September 5, 1995
    Date of Patent: June 24, 1997
    Assignee: Hilton Oil Corporation
    Inventor: Howard V. Leendersten