Patents by Inventor Lance W. Johnson

Lance W. Johnson 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).

  • Coupling apparatus for repairing asbestos cement pipe
    Patent number: 5029905
    Abstract: A coupling apparatus for connecting a pair of asbestos-cement pipes in fluid communication with a replacement pipe, the coupling apparatus including a coupling assembly having a bore which is dimensioned telescopingly to receive the spigot ends of the asbestos-cement pipe, and the replacement pipe, and a pair of sealing members are mounted in the bore and are individually adapted to sealingly engage the spigot end of the asbestos-cement pipe and the replacement pipe respectively.
    Type: Grant
    Filed: April 20, 1989
    Date of Patent: July 9, 1991
    Inventor: Lance W. Johnson