Patents by Inventor Carlos R. Schoolcraft

Carlos R. Schoolcraft 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).

  • Compressed air drain opening device
    Patent number: 7340783
    Abstract: An air plunger is described. The air plunger comprises an upper barrel and a lower barrel slidably received by the upper barrel. An air seal is fixed to the lower barrel and slidably engages with the upper barrel. A nozzle is attached to the lower barrel opposite to the upper barrel. A stop mechanism prohibits the upper barrel from disassociating with the lower barrel.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: March 11, 2008
    Inventors: J. Kirk Leaphart, Jr., C. Mark Leaphart, Carlos R. Schoolcraft, Michael L. Ernst
  • Plunger bell
    Patent number: D514760
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: February 7, 2006
    Inventors: Carlos R. Schoolcraft, Michael L. Ernst
  • Drain plunger
    Patent number: D549536
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: August 28, 2007
    Inventors: Carlos R. Schoolcraft, William J. Kraimer, Michael L. Ernst