Patents by Inventor C. Bertil Fogman

C. Bertil Fogman 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).

  • Treatment of feed for high severity visbreaking
    Patent number: 4767521
    Abstract: Prior to upgrading a viscous feed by visbreaking, at least a portion of the feed is treated to remove a heavy phase in specified amounts, whereby the severity of the visbreaking may be increased. The Shell Hot Filtration number of the visbreaking product is reduced by at least 75%, compared to visbreaking of untreated feed at some severity.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: August 30, 1988
    Assignee: Lummus Crest, Inc.
    Inventors: Robert J. Feldman, James M. Chen, Andrei Rhoe, Roger P. Van Driesen, C. Bertil Fogman, Donald P. Satchell