Patents by Inventor Victor D. Allred

Victor D. Allred 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).

  • Process for suppressing carbonate decomposition in vapor phase water retorting
    Patent number: 4243511
    Abstract: Oil shale containing relatively large quantities of alkaline carbonate minerals is retorted utilizing superheated water vapor at temperatures of from about 425.degree. C. to about 510.degree. C. Retorting with a sufficient carbon dioxide partial pressure effectively suppresses decomposition of the alkaline carbonates to obtain an environmentally acceptable retorted shale.
    Type: Grant
    Filed: March 26, 1979
    Date of Patent: January 6, 1981
    Assignee: Marathon Oil Company
    Inventor: Victor D. Allred
  • Vapor phase water process for retorting oil shale
    Patent number: 3960702
    Abstract: Oil shale is retorted using vapor phase water at about 850.degree.-950.degree.F, at a superficial gas velocity of about 20 feet per minute and at a pressure in the range of from about 1 to about 150 p.s.i.a.
    Type: Grant
    Filed: August 8, 1974
    Date of Patent: June 1, 1976
    Assignee: Marathon Oil Company
    Inventor: Victor D. Allred