Patents by Inventor Robert J. Feldman

Robert J. Feldman 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).

  • Catalyst regeneration in a dehydrogenation process
    Patent number: 5315056
    Abstract: In a dehydrogenation process wherein catalyst is regenerated off-stream by use of heated air, at least two reactors are in the regeneration cycle, with regeneration air being heated to regeneration catalyst temperature for introduction into the first reactor, and thereafter being reheated to catalyst regeneration temperature and introduced into the second reactor. Such air may also be employed for preheating feed to the dehydrogenation reactor and/or for steam generation by heating such air to the temperature required for such procedure.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: May 24, 1994
    Assignee: ABB Lummus Crest Inc.
    Inventors: Robert J. Feldman, Joseph M. Dufallo, William A. Schwartz, Theodore S. Williams
  • High severity visbreaking with recycle
    Patent number: 4846958
    Abstract: The severity of a visbreaking operation is increased by treating product to remove a heavier phase in an amount of less than 15 weight percent and recycling treated product.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: July 11, 1989
    Assignee: Lummus Crest, Inc.
    Inventors: Robert J. Feldman, Andrei Rhoe, Roger P. Van Driesen, Joseph F. Puzio, Vincent A. Strangio
  • High severity visbreaking
    Patent number: 4773986
    Abstract: The severity of a visbreaking operation is increased by treating product to remove a heavier phase in an amount of less than 15 weight percent and provide a remaining product having a Shell Hot Filtration number of less than 0.25.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: September 27, 1988
    Assignee: Lummus Crest, Inc.
    Inventors: Robert J. Feldman, Andrei Rhoe, Roger P. Van Driesen, Joseph F. Puzio, Vincent A. Strangio
  • 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