Patents by Inventor Dwight S. Hoffman

Dwight S. Hoffman 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 for purifying alcohol esters
    Patent number: 5424467
    Abstract: Triglycerides, such as vegetable oils and animal fats, are esterified with alcohols to produce alcohol esters which can be used as alternative fuel sources. By-products of the transesterification reaction are stripped from the effluent of the transesterification reactor using a recovery alcohol that can be an isolated by-product of the transesterification reaction.
    Type: Grant
    Filed: July 14, 1993
    Date of Patent: June 13, 1995
    Assignee: Idaho Research Foundation
    Inventors: Narendra Bam, David C. Drown, Roger Korus, Dwight S. Hoffman, Timothy G. Johnson, Jacqueline M. Washam