Patents by Inventor David Sageman

David Sageman 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).

  • Gasification process for carbonaceous materials
    Patent number: 4443229
    Abstract: A coal gasification process is disclosed wherein two portions of heat transfer material are introduced into the reaction vessel at different locations and different temperatures. Steam is passed upwardly through the vessel to react with the carbonaceous material to form a hot char and a gaseous product, wherein the heat necessary for the coal gasification reaction is supplied by both the first portion of heat transfer material and the second portion of heat transfer material. Then the hot char and gaseous product are cooled by contact with the first portion of heat transfer material.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: April 17, 1984
    Assignee: Chevron Research Company
    Inventors: David Sageman, David S. Mitchell