Patents Represented by Attorney Joseph J. Dvorak
  • Patent number: 7378452
    Abstract: A method for separating and filtering solid particles from a hydrocarbon slurry liquid includes two or more filter sections in fluid communication with the hydrocarbon slurry. At least one filter section is comprised of one or more filter elements having a mean pore size of less than 10 microns, and at least one other section is comprised of one or more filter elements having a mean pore size of 10 microns or greater. The small pore filter (less than 10 microns) will exclude all or substantially all of the smaller catalyst fines produced by catalyst particle attrition. The liquid product removed from the small pore filters will be substantially free of particulates. The large pore filters (10 microns or greater) will exclude larger catalyst particles, but will allow the smaller fines to pass. The liquid product removed from the large pore filters will contain the fines generated from catalyst particle attrition.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: May 27, 2008
    Assignee: Exxonmobil Research and Engineering Company
    Inventors: David C. Long, Thomas M. Holden, Stephen J. Hsia, Costas A. Coulaloglou
  • Patent number: 7309681
    Abstract: An ashless natural gas engine lubricating composition which has enhanced resistance to oxidation, nitration and viscosity increase employs as additives in a lubricating oil basestock a combination of phenolic and alkylthiocarbamoyl antioxidants and an ashless phosphorous antiwear additive.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: December 18, 2007
    Assignee: ExxonMobil Research and Engineering Company
    Inventor: S. James Cartwright
  • Patent number: 7176168
    Abstract: The present invention describes an improved lubricant composition comprising a particularly effective combination of components comprising ashless antiwear and rust inhibitor additives with an antioxidant liquid mixture formed by reacting an olefin with a mixture of diphenylamines and phenothiozines.
    Type: Grant
    Filed: March 17, 2004
    Date of Patent: February 13, 2007
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Walter D. Vann, Liehpao Oscar Farng, Angela S. Galiano-Roth, Marcia G. Rogers, Paul Dubs, Miles J. Hutchings
  • Patent number: 7124728
    Abstract: A marine diesel engine system includes a diesel engine having a plurality of cylinders. The system also includes, proximate the engine, a primary engine lubricant and an additive selected from certain alkylamine-alkylphosphates, 500 TBN calcium sulfonate and mixtures thereof. A means for blending the lubricant and additives into a mixture for introduction into a cylinder is provided. Thus lubricant properties may be modified depending upon engine conditions.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: October 24, 2006
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Vincent Mark Carey, Kevin John Kelly, Kevin Louis Crouthamel, Keith Preston Saddler
  • Patent number: 7045553
    Abstract: The invention provides a method for producing liquid hydrocarbons by first generating in a pressure swing reformer a synthesis gas stream having a mole ratio of H2:CO greater than 2:1. Then, a portion of the hydrogen is separated to produce a synthesis gas stream having a mole ratio of H2:CO of about 2:1 which steam is then introduced into a hydrocarbon synthesis reactor for conversion to liquid products.
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: May 16, 2006
    Assignee: ExxonMobil Research and Engineering Company
    Inventor: Frank Hershkowitz
  • Patent number: 6942739
    Abstract: The present invention is directed to a process for producing pearlite from an iron containing article comprising the steps of, (a) heating an iron containing article comprising at least 50 wt % iron for a time and at a temperature sufficient to convert at least a portion of said iron from a ferritic structure to an austenitic structure, (b) exposing said austenitic structure, for a time sufficient and at a temperature of about 727 to about 900° C., to a carbon supersaturated environment to diffuse carbon into said austenitic structure and (c) cooling said iron containing article to form a continuous pearlite structure.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: September 13, 2005
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Changmin Chun, Trikur Anantharaman Ramanarayanan, James Dirickson Mumford, Adnan Ozekcin
  • Patent number: 6923949
    Abstract: Pure phase, high activity ZSM-48 crystals having a SiO2/Al2O3 ratio of less than about 150/1, substantially free from ZSM-50 and Kenyaite, and fibrous morphology crystals. The crystals may further have a specific cross morphology. A method for making such crystals using heterostructural, zeolite seeds, other than ZSM-48 and ZSM-50 seeds.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: August 2, 2005
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Wenyih F. Lai, Richard B. Saunders, Machteld M. Mertens, Johannes P. Verduijn
  • Patent number: 6916766
    Abstract: A combination of an ashless dispersant comprising the reaction product of a succinic anhydride and a polyamine and an ashless rust inhibitor comprising a mixture of a succinic anhydride and a oxime substituted aromatic compound in a lubricant base stock along with a poly alkylene alcohol demulsifier provides a circulating oil composition having good demulsibility, deposit control and rust inhibition.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: July 12, 2005
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Kevin Buzdygon, Angela Stefana Galiano-Roth
  • Patent number: 6844298
    Abstract: The present invention relates to a water-soluble aluminium and aluminium alloys hot rolling composition comprising a base stock oil and, based on the total weight of the composition, from 1 to 80% by weight of a combination of: a monoester of a fatty acid with a polyol and a tetraester of a fatty acid with pentaerythritol; the weight monoester:tetraester ratio of said combination ranging from 1:20 to 10:1. The invention also relates to an oil-in-water emulsion, to a hot rolling process and to the use of the oil-in-water emulsion in a hot rolling process.
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: January 18, 2005
    Assignee: Mobil Oil Francaise
    Inventors: Francis Prince, Jean-Yves Henri Claire
  • Patent number: 6843087
    Abstract: The present invention relates to a cold rolling process for rolling hard metal or metal alloys, comprising applying an effective amount of an oil composition comprising a base stock oil and, based on the total weight of the composition, from 1 to 80% by weight of di(2-ethylhexyl)adipate. Example of hard base metals include steel and nickel.
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: January 18, 2005
    Assignee: Mobil Oil Francaise
    Inventors: Francis Prince, Jean-Yves Henri Claire
  • Patent number: 6764610
    Abstract: Phosphate ester based functional fluids containing novel anti-erosion additives provides enhanced results in erosion control.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: July 20, 2004
    Assignee: ExxonMobil Research and Engineering Company
    Inventor: Marc-André Poirier
  • Patent number: 6764611
    Abstract: Phosphate ester based functional fluids containing novel anti-erosion additives provides enhanced results in erosion control.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: July 20, 2004
    Assignee: ExxonMobil Research and Engineering Company
    Inventor: Marc-André Poirier
  • Patent number: 6736867
    Abstract: The present invention relates to emulsion compositions for starting a reformer of a fuel cell system. In particular, the invention includes emulsion compositions comprising hydrocarbon fuel, water and ethoxylated alkyl amine surfactants for starting a reformer of a fuel cell system.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: May 18, 2004
    Assignee: ExxonMobile Research and Engineering Company
    Inventors: Ramesh Varadaraj, Paul Joseph Berlowitz
  • Patent number: 6730138
    Abstract: The present invention relates to emulsion compositions for starting a reformer of a fuel cell system. In particular, the invention includes emulsion compositions comprising hydrocarbon fuel, water and alkyl polyglycerol surfactants for starting a reformer of a fuel cell system.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: May 4, 2004
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Ramesh Varadaraj, Paul Joseph Berlowitz
  • Patent number: 6214776
    Abstract: An oil composition useful as a high stress electrical oil and especially as a transformer load tap changer oil is provided. The composition comprises a major amount of a paraffinic oil having a low viscosity of less than about 20 cSt @ 40° C. and an effective amount of an additive system including at least one hindered phenolic antioxidant and a benzotriazole metal deactivator.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: April 10, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Jacob B. Angelo, Christopher Jeffrey Still Kent, Frederick Michael Gragg
  • Patent number: 6191078
    Abstract: An aviation piston engine lubricant having no metal containing additive is provided. The lubricant contains (a) a base oil consisting essentially of a mixture of (i) at least about 50 wt % based on the total weight of the lubricant of one or more mineral oils having a viscosity in the range of about 5 cSt to about 25 cSt at 100° C. and (ii) about 15 to about 40 wt % based on the total weight of the lubricant of a polyalpha olefin fluid having a viscosity in the range of about 4 cSt to about 40 cSt at 100° C.; (b) at least about 3 wt % based on the total weight of the lubricant of an ashless polyisobutylene succinic anhydride/polyamine (PIBSA/PAM) dispersant; and (c) an effective amount of one or more ashless additives selected from the group consisting of antiwear agents, extreme pressure agents, metal passivators, and antioxidants.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: February 20, 2001
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Antika Shlomo, Frederick W. Girshick, Patrick Edward Godici, Richard A. Skillman
  • Patent number: 6184185
    Abstract: The present invention provides a lubricant oil composition for an automatic and continuously variable transmission with a built-in torque converter equipped with a lock-up clutch, which is incorporated, in the base oil, with a compound containing at least one type of cyclic carboxylic acid imide having boron in the molecule and substituted by an alkyl or alkenyl group, wherein the cyclic carboxylic acid imide is contained at 0.1 to 12 wt % based on the whole composition.
    Type: Grant
    Filed: April 2, 1999
    Date of Patent: February 6, 2001
    Assignee: Tonen Corporation
    Inventors: Shigeko Taguchi, Hiroshi Nakanishi, Takanori Kugimiya
  • Patent number: 6136760
    Abstract: A lubricant composition containing both a dialkyl fumarate-vinyl acetate low temperature flow improver and sorbitan fatty acid ester or a polyoxyalkylene sorbitan fatty acid ester has reduced Gel Index.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: October 24, 2000
    Assignee: Exxon Research and Engineering Company
    Inventors: Bernd A. Koenitzer, Christopher J. May
  • Patent number: 6110358
    Abstract: A method for producing a process oil in which a naphthenic rich distillate is processed through a single hydrotreating stage, the hydrotreated distillate is then solvent extracted to yield a process oil which passes IP-346 and AMES screening test.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: August 29, 2000
    Assignee: Exxon Research and Engineering Company
    Inventors: Keith K. Aldous, Jacob B. Angelo, Joseph P. Boyle
  • Patent number: 5853569
    Abstract: A method for producing a process oil is provided in which a napthenic rich feed is enriched with an aromatic extract oil. The enriched feed is then subjected to a solvent extraction thereby providing a process oil.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: December 29, 1998
    Assignee: Exxon Research and Engineering Company
    Inventors: Keith K. Aldous, Jacob Ben Angelo, Joseph Philip Boyle