Patents by Inventor Donald H. Ruge

Donald H. Ruge 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 extruding bark and of forming a solid synthetic fuel
    Patent number: 3947255
    Abstract: A method of extruding bark and of forming a solid article, solid synthetic fuel or fireplace log comprising from about 60 to 95 percent by weight bark, which comprises physically blending pieces of combustible thermoplastic of an extrudable size with pieces of bark also of an extrudable size and having less than 7 percent preferably less than 2 percent moisture, to form a bark thermoplastic mixture of from about 60 to 95 percent by weight bark and about 2.
    Type: Grant
    Filed: January 10, 1973
    Date of Patent: March 30, 1976
    Assignee: American Can Company
    Inventors: William H. Hartman, Raymond E. Mietz, John R. Peschke, Donald H. Ruge