Patents Represented by Attorney W. Keith Turner
  • Patent number: 7214307
    Abstract: A composition of white oil having a kinematic viscosity at 100° C. between about 1.5 cSt and 36 cSt, a viscosity index greater than an amount calculated by the equation: Viscosity Index=28×Ln(the Kinematic Viscosity at 100° C.)+105, less than 18 weight percent of molecules with cycloparaffin functionality, a pour point less than zero degrees C., and a Saybolt color of +20 or greater. Also, a composition of white oil having a kinematic viscosity at 100° C. between about 1.5 cSt and 36 cSt, a viscosity index greater than an amount calculated by the equation: Viscosity Index=28×Ln(the Kinematic Viscosity at 100° C.)+95, between 5 and less than 18 weight percent of molecules with cycloparaffin functionality, less than 1.2 weight percent molecules with multicycloparaffin functionality, a pour point less than zero degrees C., and a Saybolt color of +20 or greater.
    Type: Grant
    Filed: July 22, 2004
    Date of Patent: May 8, 2007
    Assignee: Chevron U.S.A. Inc.
    Inventors: Stephen J. Miller, Susan M. Abernathy, John M. Rosenbaum
  • Patent number: 7195706
    Abstract: A process for manufacturing a finished lubricant by: a) performing Fischer-Tropsch synthesis on syngas to provide a product stream; b) isolating from said product stream a substantially paraffinic wax feed having less than about 30 ppm total nitrogen and sulfur, and less than about 1 wt % oxygen; c) dewaxing said feed by hydroisomerization dewaxing using a shape selective intermediate pore size molecular sieve comprising a noble metal hydrogenation component, wherein the hydroisomerization temperature is between about 600° F. (315° C.) and about 750° F. (399° C.), to produce an isomerized oil; and d) hydrofinishing said isomerized oil, whereby a lubricating base oil is produced having specific desired properties; and e) blending the lubricating base oil with at least one lubricant additive.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: March 27, 2007
    Assignee: Chevron U.S.A. Inc.
    Inventors: Susan M. Abernathy, David C. Kramer, John M. Rosenbaum, Stephen J. Miller, Russell R. Krug, James N. Ziemer, Robert J. Farina, Mark L. Sztenderowicz
  • Patent number: 6290922
    Abstract: The present invention relates to new crystalline zeolite SSZ-47 prepared using a bicyclo ammonium cation templating agent and its use in the reduction of oxides of nitrogen.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: September 18, 2001
    Assignee: Chevron U.S.A. Inc.
    Inventors: Gregory S. Lee, Yumi Nakagawa, Stacey I. Zones
  • Patent number: 6150577
    Abstract: The invention includes a process of making a lubricating oil composition including: a process for making a high VI lubricating oil composition including the steps of (1) contacting a waste plastics feed including mainly polyethylene in a pyrolysis zone at pyrolysis conditions, whereby at least a portion of the waste plastics feed is cracked, thereby forming a pyrolysis zone effluent including 1-olefins and n-paraffins; (2) passing the pyrolysis zone effluent, including a heavy fraction and a middle fraction, the pyrolysis effluent middle fraction including 1-olefins, to a separations zone; where the pyrolysis effluent heavy fraction portion is separated from the pyrolysis effluent middle fraction; (3) passing the pyrolysis effluent heavy fraction to a hydrogenation zone; and (4) passing at least a portion of the hydrogenation zone effluent to a catalytic isomerization dewaxing zone, where at least a portion of the hydrogenation zone effluent is contacted with a isomerization dewaxing catalyst at isomerization
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: November 21, 2000
    Assignee: Chevron U.S.A., Inc.
    Inventors: Stephen J. Miller, Gerald P. Huffman, Naresh Shah
  • Patent number: 6143940
    Abstract: The invention includes a process of making a wax composition including: a process for making a heavy wax composition including the steps of (1) contacting a waste plastics feed containing primarily polyethylene in a pyrolysis zone at sub-atmospheric pressure, whereby at least a portion of the waste plastics feed is cracked, thereby forming a pyrolysis zone effluent including 1-olefins and n-paraffins; and (2) passing the pyrolysis zone effluent to a hydrotreating zone, for contacting with a hydrotreating catalyst at catalytic conditions.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: November 7, 2000
    Assignees: Chevron U.S.A. Inc., University of Kentucky Research Foundation
    Inventors: Stephen J. Miller, Gerald P. Huffman, Naresh Shah
  • Patent number: 6136181
    Abstract: The present invention relates to a novel platinum palladium alloy catalyst useful in hydrofinishing and hydrocracking non low sulfur content feedstock and the process of hydrofinishing and hydrocracking such non low sulfur content feedstock feeds. The catalyst maintains the activity of a palladium catalyst with the sulfur tolerance of a platinum catalyst without the need for the higher reaction temperatures normally associated with platinum based catalysts and thus avoid the higher rates of undesirable cracking reactions in the fabrication of a lubricating base oil stock.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: October 24, 2000
    Assignee: Chevron U.S.A. Inc.
    Inventor: James N. Ziemer
  • Patent number: 6111037
    Abstract: An amorphous aluminophosphate composition is provided which exhibits a microstructure of sheets and spheres of silica-modified aluminophosphate. Also provided is a method for preparing the composition comprising mixing an aqueous solution containing aluminum ions, phosphate ions and silica ions, with a neutralizing solution, wherein the mixing is conducted with sufficient shear to produce on a microlevel, sheets of silica-modified aluminophosphate and spheres of silica-modified aluminophosphate. A polymerization catalyst and a polymerization process are also provided.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: August 29, 2000
    Assignee: Chevron Chemical Company LLC
    Inventors: Pamela R. Auburn, Theresa A. Pecoraro, Ignatius Y. Chan
  • Patent number: 6086749
    Abstract: A method and catalyst mixture for hydroprocessing a hydrocarbon feed stream through a moving catalyst bed having a catalyst mixture and contained within a single onstream reactor vessel. The reactor vessel contains the catalyst mixture which includes two or more different and distinct catalyst for any hydroprocessing application. The different and distinct catalyst have different catalyst density and are designed for a different function, such as HDM and HDN. The different and distinct catalysts can also have different average residence times if their densities and physical properties are properly selected.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: July 11, 2000
    Assignee: Chevron U.S.A. Inc.
    Inventors: David C. Kramer, Bruce E. Stangeland
  • Patent number: 6086848
    Abstract: The present invention relates to a process for preparing zeolites having 12-ring pores and having at least one internal pore structure with a cross section measuring greater than 7.5 .ANG. using substituted-piperidinium cations as organic templates.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: July 11, 2000
    Assignee: Chevron U.S.A. Inc.
    Inventors: Yumi Nakagawa, Gregory S. Lee, Stacey I. Zones
  • Patent number: 6080382
    Abstract: The present invention relates to new crystalline zeolite SSZ-48 prepared using a decahydroquinolinium cation templating agent.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: June 27, 2000
    Assignee: Chevron U. S. A. Inc.
    Inventors: Gregory S. Lee, Stacey I. Zones
  • Patent number: 6057272
    Abstract: The present invention relates to synthetic hydrocarbon as the continuous phase of a drilling fluid. These hydrocarbons comprise mostly linear olefins, preferably C.sub.14 to C.sub.18 olefins.
    Type: Grant
    Filed: November 4, 1997
    Date of Patent: May 2, 2000
    Assignee: Chevron Chemical Company LLC
    Inventors: Jeffrey C. Gee, Roger C. Williamson, Christophe J. Lawrie
  • Patent number: 6030921
    Abstract: The present invention relates to a novel platinum palladium alloy catalyst useful in hydrofinishing and hydrocracking non low sulfur content feedstock and the process of hydrofinishing and hydrocracking such non low sulfur content feedstock feeds. The catalyst maintains the activity of a palladium catalyst with the sulfur tolerance of a platinum catalyst without the need for the higher reaction temperatures normally associated with platinum based catalysts and thus avoid the higher rates of undesirable cracking reactions in the fabrication of a lubricating base oil stock.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: February 29, 2000
    Assignee: Chevron U.S.A. Inc.
    Inventor: James N. Ziemer
  • Patent number: 5825024
    Abstract: An apparatus for measuring the density of a subterranean formation from within a wellbore, especially a cased wellbore. The apparatus has an energy source configured to generate 14 MeV of neutrons in pulses of 20 microseconds or less. The apparatus has at least three detectors for detecting gamma rays which are produced as a result of the neutron pulse. The detectors and energy source are aligned along a central axis with the energy source being at one end. Shielding is disposed between each of the three detectors and between the end detector and the energy source adjacent to it. The detectors are configured to measure gamma rays below 700 KeV and generate a signal in response thereto. The signals may then be compared to predetermined characteristic signals or computer simulations to determine the density, and hence porosity, of the formation.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: October 20, 1998
    Assignee: Chevron U.S.A. Inc.
    Inventor: Ahmed Badruzzaman
  • Patent number: 5743334
    Abstract: A method is provided for evaluating the quality of a hydraulic fracture treatment performed in a completed wellbore penetrating a subterranean hydrocarbon-bearing formation. The method is initiated by creating a pressure differential or utilizing an existing pressure differential between the wellbore and the formation and placing a lower packer and an upper packer in the wellbore. The lower and upper packers are positioned in the wellbore at or near the bottom of the producing interval to enclose one or more lower perforations within a wellbore chamber sealed to the remainder of the wellbore. Pressure values of the wellbore chamber are measured for a predetermined time period and then the lower and upper packers are repositioned to enclose the next one or more perforations in sequence within a new wellbore chamber. This procedure is repeated until pressure values have been measured in all wellbore chambers enclosing perforations of interest.
    Type: Grant
    Filed: April 4, 1996
    Date of Patent: April 28, 1998
    Assignee: Chevron U.S.A. Inc.
    Inventor: Donald G. Nelson
  • Patent number: 5690896
    Abstract: A multi-bed, down-flow reactor includes several distributor assemblies, each having a centrally located mixing chamber and an annular collecting and mixing trough surrounding the mixing chamber. The mixing chamber has an inlet at one side thereof, an outlet in its bottom wall, and a quench gas inlet in its top wall above the outlet. A divider wall traverses the annular trough adjacent to the inlet to cause the pool of liquid collected in the trough to flow in a circular pattern around the mixing chamber to the inlet. This ensures that the liquid circulating through the trough is well mixed with the liquid raining down from the catalyst bed. Turbulent and spiraling flow patterns generated within the chamber further mix the liquid and gas and entrain quench gas in the liquid and gas stream.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: November 25, 1997
    Assignee: Chevron U.S.A. Inc.
    Inventors: Bruce E. Stangeland, Krishniah Parimi, Dennis R. Cash
  • Patent number: 5580463
    Abstract: A method for removing residual oil from oily water under pressure is provided. The method comprises flowing a liquid stream of an oily water downward through a vertically extended zone to remove the residual oil. A gas is injected into the lower end of the zone and at a rate sufficient to generate bubbles of a predetermined volume in the liquid stream. A sufficient pressure is maintained in the zone to control the rate of expansion of the bubbles to a volume compatible with oil droplets in the liquid stream during upward migration of the bubbles and the oil droplets. The rate of flow of the liquid stream from the lower end of the zone and the rate of flow of the gas from the upper end of the zone are regulated to collect residual oil from a quiescent volume within the upper portion of the zone.
    Type: Grant
    Filed: October 27, 1994
    Date of Patent: December 3, 1996
    Assignee: Chevron U.S.A. Inc.
    Inventor: Gale L. Hubred
  • Patent number: 5484755
    Abstract: High activity slurry catalysts for hydroprocessing heavy hydrocarbon oils are produced from Group VIB metal compounds by sulfiding an aqueous mixture of the metal compound with from greater than about 8 to about 14 SCF of hydrogen sulfide per pound of Group VIB metal.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: January 16, 1996
    Inventor: Jaime Lopez
  • Patent number: 5430218
    Abstract: Light paraffinic hydrocarbons are catalytically dehydrogenated using a dehydrogenation catalyst and a polymer-porous solid composite membrane capable of separating hydrogen from the effluent of the dehydrogenation reaction. The polymer-porous solid composite membrane may be, e.g., a porous ceramic material coated with a fluorinated dianhydride-diamine, a fluorinated polycarbonate or fluorinated polysulfone.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: July 4, 1995
    Assignees: Chevron U.S.A. Inc., Board of Regents, University of Texas System
    Inventors: Stephen J. Miller, Mary E. Rezac, William J. Koros
  • Patent number: 5274605
    Abstract: A process for depth migration of seismic wave information that has been derived from geological media that causes rapid lateral velocity variations in seismic waves. The process includes the step of decomposing wavefields recorded at the earth's surface using Gaussian beams as basic functions. Then, according to the process, the set of Gaussian beams is extrapolated downward into the earth to obtain the subsurface wavefield. Finally, the wavefield is processed to provide depth-migrated images of subsurface reflectors.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: December 28, 1993
    Assignee: Chevron Research and Technology Company
    Inventor: N. Ross Hill
  • Patent number: H2008
    Abstract: A food flagging device has a flag stem, a time identification means, a magnet support platform, and a magnetic means. The time identification means is either attached to, or is contained within, the flag stem. The magnet support platform is either attached to, or is contiguous with, the flag stem. The magnetic means is attached to the magnet support platform and has a magnetic field that is sufficiently strong to hold the food flagging device to a stainless steel surface. The food flagging device is heat-resistant and is capable of being sanitized.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: January 1, 2002
    Assignee: Chevron Products Company, a division of Chevron U.S.A. Inc.
    Inventor: Mark R. Johnson