Patents by Inventor David W. Guy

David W. Guy 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).

  • Method of producing binderless pellets from low rank coal
    Patent number: 5411560
    Abstract: The invention relates to a method and apparatus of forming pellets and in particular spherical binderless pellets from lower rank coals. The method includes the steps of feeding a pelletizing means 10, with a lower rank feedstock, 1; rotating the coal in said pelletizing means, 10, to form pellets in the absence of any binder, wherein the pellets are formed by compaction and layering of coal fines. The moisture content of the lower rank coal is at a level so as to at least substantially fill the voids within the coal.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: May 2, 1995
    Assignee: Swinburne Limited
    Inventors: David E. Mainwaring, David W. Guy
  • Compartmented serving tray
    Patent number: D316010
    Type: Grant
    Filed: February 16, 1989
    Date of Patent: April 9, 1991
    Inventor: David W. Guy
  • Food dish
    Patent number: D316011
    Type: Grant
    Filed: February 16, 1989
    Date of Patent: April 9, 1991
    Inventor: David W. Guy
  • Beverage mug
    Patent number: D319755
    Type: Grant
    Filed: February 16, 1989
    Date of Patent: September 10, 1991
    Inventor: David W. Guy