Patents by Inventor Raymond H. Hughes

Raymond H. Hughes 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).

  • Transporting heavy fuel oil as a slurry
    Patent number: 4050742
    Abstract: Heavy fuel oil having an average pour point above the average minimum temperature of a transporting system is effectively transported by first physically separating the heavy fuel oil into two portions, fractionating the first portion into a relatively low pour point fraction and a relatively high pour point fraction, recombining the relatively low pour point fraction with the second portion, congealing the second portion to form particles, coating the congealed particles with the relatively high pour point fraction and thereafter slurrying the coated, congealed particles in a carrier liquid, preferably water, and transporting the slurry in a transportation system, preferably a pipeline.
    Type: Grant
    Filed: November 4, 1976
    Date of Patent: September 27, 1977
    Assignee: Marathon Oil Company
    Inventors: Raymond H. Hughes, Carl D. Clay