Patents by Inventor Lucius John Fry

Lucius John Fry 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).

  • Scum drag
    Patent number: 3954619
    Abstract: A scum drag for removal of floating scum from a closed methane generator is a float having a fence or rake extending upwardly. Draglines are connected to it to pull the float and fence in a direction transverse to the fence. The pile of scum that accumulates with movement is engaged by the fence and bodily moved to a scum exit, where it is discharged into a truck or otherwise transported away.
    Type: Grant
    Filed: May 6, 1975
    Date of Patent: May 4, 1976
    Inventor: Lucius John Fry