Patents by Inventor John E. Boysen

John E. Boysen 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).

  • Inclined fluidized bed system for drying fine coal
    Patent number: 5087269
    Abstract: Coal is processed in an inclined fluidized bed dryer operated in a plug-flow manner with zonal temperature and composition control, and an inert fluidizing gas, such as carbon dioxide or combustion gas. Recycled carbon dioxide, which is used for drying, pyrolysis, quenching, and cooling, is produced by partial decarboxylation of the coal. The coal is heated sufficiently to mobilize coal tar by further pyrolysis, which seals micropores upon quenching. Further cooling with carbon dioxide enhances stabilization.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: February 11, 1992
    Assignee: Western Research Institute
    Inventors: Chang Y. Cha, Norman W. Merriam, John E. Boysen
  • Process for removing heavy metal compounds from heavy crude oil
    Patent number: 5041209
    Abstract: A process is provided for removing heavy metal compounds from heavy crude oil by mixing the heavy crude oil with tar sand; preheating the mixture to a temperature of about 650.degree. F.; heating said mixture to up to 800.degree. F.; and separating tar sand from the light oils formed during said heating. The heavy metals removed from the heavy oils can be recovered from the spent sand for other uses.
    Type: Grant
    Filed: July 12, 1989
    Date of Patent: August 20, 1991
    Assignee: Western Research Institute
    Inventors: Chang Y. Cha, John E. Boysen, Jan F. Branthaver