Patents Represented by Attorney Kimberly L. Muller
  • Patent number: 4950384
    Abstract: A hydrocarbonaceous feedstock is hydrocracked by contacting the feedstock in a first reaction stage at elevated temperature and pressure in the presence of hydrogen with a first hydrocracking catalyst to obtain a first effluent, separating from the first effluent a gaseous phase and a liquid phase at substantially the same temperature and pressure as prevailing in the first reaction stage, contacting the liquid phase of the first effluent in a second reaction stage at elevated temperature and pressure in the presence of hydrogen and a second hydrocracking catalyst to obtain a second effluent, obtaining at least one distillate fraction and a residual fraction from the combination of the gaseous phase and the second effluent by fractionation, and recycling at least a part of the residual fraction to a reaction stage.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: August 21, 1990
    Assignee: Shell Oil Company
    Inventors: Dees J. W. Groeneveld, Swan T. Sie
  • Patent number: D507872
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: August 2, 2005
    Assignee: Shell Oil Company
    Inventor: Patrick D. Watson
  • Patent number: D534322
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: December 26, 2006
    Assignee: Shell Oil Company
    Inventor: Patrick D. Watson
  • Patent number: D576802
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: September 16, 2008
    Assignee: Shell Oil Company
    Inventors: Grant Evans Weidler, Farah Jumshyd, Maximillian Philip Burton, Anthony Dibitonto