Patents by Inventor Ryan F. Washburn

Ryan F. Washburn 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).

  • Process for making refractory shapes
    Patent number: 4150078
    Abstract: This application relates to a process for making ceramic shapes from nonplastic size graded ceramic materials comprising the formulation of a unique batch. The batch is processed in a water-cooled pug mill-extruder to prepare a deaired and densified column. The column is cut into constant volume billets. The billets are then pressed or reformed at low pressures into uniformly sized shapes which are thereafter dried and fired to develop a ceramic bond.
    Type: Grant
    Filed: March 18, 1977
    Date of Patent: April 17, 1979
    Assignee: Lava Crucible Refractories Company
    Inventors: Eldon D. Miller, Ryan F. Washburn
  • Process for making refractory shapes
    Patent number: 4028453
    Abstract: This application relates to a process for making ceramic shapes from nonplastic size graded ceramic materials comprising the formulation of a unique batch. The batch is processed in a water-cooled pug mill-extruder to prepare a deaired and densified column. The column is cut into constant volume billets. The billets are then pressed or reformed at low pressures into uniformly sized shapes which are thereafter dried and fired to develop a ceramic bond.
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: June 7, 1977
    Assignee: Lava Crucible Refractories Company
    Inventors: Eldon D. Miller, Ryan F. Washburn