Patents by Inventor John E. Nelsen

John E. Nelsen 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).

  • Flange protector
    Patent number: 4014368
    Abstract: A one piece protector for the machined surface of a flange for pipes and valves which may be installed and removed by finger pressure on integral thimbles which frictionally engage the bores of the bolt holes of the flange.
    Type: Grant
    Filed: February 13, 1976
    Date of Patent: March 29, 1977
    Assignee: Alliance Plastics, Inc.
    Inventor: John E. Nelsen