Patents by Inventor Julian M. Liggett

Julian M. Liggett 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).

  • Formcoke process
    Patent number: 4557733
    Abstract: Green coal is charred in pre- and post- treatment carbonizers, then crushed, mixed with pitch, briquetted, tempered in a tempering oven, recirculated with succeeding green coal to char in a reducing atmosphere through only the latter part of the pre-treatment carbonizer and through the post-treatment carbonizer, cooled, and separated from the as yet unbriquetted char. The pre-treatment carbonization is characterized by having air updrafted through all the airbox zones under the travelling grate.
    Type: Grant
    Filed: November 5, 1984
    Date of Patent: December 10, 1985
    Assignee: Peabody Development Company
    Inventors: Jimmy B. Smith, Julian M. Liggett