Patents by Inventor John J. Helstrom

John J. Helstrom 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).

  • Open-bottomed cyclone with gas inlet tube and method
    Patent number: 5362379
    Abstract: An open-bottomed cyclone separator with gas inlet tube is disclosed which minimizes the entrainment of separated solids in a process gas entering the separator. In some embodiments, the gas inlet tube directs the process gas into a solids-depleted region within a cyclonic separation chamber. In other embodiments, a gas inlet tube directs the process gas into a stream of solids-depleted gas withdrawn from the chamber. Methods for practicing the invention are also disclosed.
    Type: Grant
    Filed: December 27, 1991
    Date of Patent: November 8, 1994
    Assignee: Amoco Corporation
    Inventor: John J. Helstrom
  • Open-bottomed cyclone with solids separation tube and method
    Patent number: 5279727
    Abstract: Open-ended cyclone separators are disclosed which employ catalyst separation tubes to prevent separated solids discharged through an open cyclone end from being entrained in a countercurrently moving flow of process gas entering the separator through the open end. In several preferred embodiments, generally conical tubes are axially located within the cyclone open bottom. Methods for practicing the invention also are disclosed.
    Type: Grant
    Filed: December 27, 1991
    Date of Patent: January 18, 1994
    Assignee: Amoco Corporation
    Inventors: John J. Helstrom, John M. Forgac
  • Methods of tar sand bitumen recovery
    Patent number: 5143598
    Abstract: Methods for the recovery of bitumen from tar sands comprising the steps of mixing tar sand, solvent and a displacing amount of aqueous medium to form a mixture, followed by separating a bitumen-rich solvent phase from the mixture and recovering bitumen from the bitumen-rich solvent phase are disclosed.
    Type: Grant
    Filed: January 14, 1988
    Date of Patent: September 1, 1992
    Assignee: Amoco Corporation
    Inventors: Robert J. Graham, John J. Helstrom, Lawrence B. Peck, Richard A. Stone, Edward J. Bernier, Jr.
  • Method for solvent treating of tar sands with water displacement
    Patent number: 4722782
    Abstract: A method for the recovery of bitumen from tar sand comprises slurrying tar sand with about 0.5 to about 4.0 pound of a organic solvent per pound of tar sand, then adding greater than about 0.50 pound water per pound of tar sand, and separating a bitumen rich solvent phase. The method has the advantage of permitting separation of sand from the bitumen rich solvent extract without formation of a stable emulsion.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: February 2, 1988
    Assignee: Standard Oil Company
    Inventors: Robert J. Graham, John J. Helstrom, Lawrence B. Peck, Richard A. Stone
  • Hydrocarbon conversion method
    Patent number: 4526675
    Abstract: A method for recovering upgraded liquid products by the hydroconversion of coal, coke, lignite, petroleum fractions, biomass, tar sands bitumen and shale oil are disclosed. In particular, the catalyst composition employed consists of a Group VIB metal component and a highly dispersed tin component.
    Type: Grant
    Filed: May 26, 1983
    Date of Patent: July 2, 1985
    Assignee: Standard Oil Company (Indiana)
    Inventors: John A. Mahoney, Regis J. Pellet, John J. Helstrom
  • Solid hydrocarbon liquefaction with a catalyst having chromium and molybdenum
    Patent number: 4514279
    Abstract: A catalyst containing molybdenum and chromium and method for recovering upgraded liquid products from a solid carbonaceous material using said catalyst are disclosed.
    Type: Grant
    Filed: November 25, 1983
    Date of Patent: April 30, 1985
    Assignee: Standard Oil Company (Indiana)
    Inventors: John A. Mahoney, John J. Helstrom, A. Martin Tait