Patents by Inventor Larry D. Catton

Larry D. Catton 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).

  • Extruder and screw with wear surfaces
    Patent number: 5135378
    Abstract: A twin screw extruder includes screw crests having wear surfaces formed of weld bead, deposited on the edges of the crests and into a groove in the crest to form a plurality of spaced dams or fences across the groove between the edges of the crest, and a molybdenum fitting between the dams. The dams or fences prevent unraveling of the entire molybdenum fitting, in the event of separation between the fitting and the screw.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: August 4, 1992
    Inventor: Larry D. Catton