Patents by Inventor Clarence I. Justheim

Clarence I. Justheim 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 retorting oil shale by velocity flow of super-heated air
    Patent number: 4384614
    Abstract: Oil shale is retorted, preferably in situ, by passing velocity flow of super-heated air through one or more conduit-like passages in direct contact with exposed surfaces of oil shale. Kerogen pyrolysis products are recovered by condensation of the vapors and collection of the condensate and by collection of the gases and separation of the valuable gases from the normally waste gases. Some of the waste gases may be recycled with the air for controlling combustion of the kerogen content of the shale.
    Type: Grant
    Filed: May 11, 1981
    Date of Patent: May 24, 1983
    Assignee: Justheim Pertroleum Company
    Inventor: Clarence I. Justheim