Patents Represented by Attorney Arthur E. Oaks
  • Patent number: 5926931
    Abstract: A device adapted to insert or remove a retention knob from a machine tool assembly used in computer controlled machine tools without compromising the use of the retention knob in other tool assemblies.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: July 27, 1999
    Inventor: Daryl G. Collins
  • Patent number: 5200098
    Abstract: A process for upgrading technical low grade cerium/fluorine-containing residues having concentrations of silicon and iron above about 1.0 weight percent produces compositions wherein the combined silicon and iron content is less than about 1.0 weight percent. Typically, the cerium content is raised to above about 50 weight percent and sufficient fluorine is present for the fluorine-to-cerium molar ratio to be 3.0 or above. Lubricating compositions comprising a major part of a lubricant and a minor amount of said upgraded cerium/fluorine-containing residue are useful as anti-wear lubricants.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: April 6, 1993
    Assignee: Union Oil Company of California
    Inventors: Josefina M. Dumdum, Paula J. Bosserman
  • Patent number: 5102635
    Abstract: The long term stability of process solutions used in H.sub.2 S-to-sulfur absorption/oxidation process, wherein the incoming hydrogen sulfide-containing gas stream is contaminated with hydrocarbons and/or organic oxygenated compounds and the process is generating an excessive amount of thiosulfate in the process solution, is improved by a method comprising contacting the gas stream and/or the process solution with charcoal to remove both the contamination and at least a portion of the thiosulfate therefrom.
    Type: Grant
    Filed: September 14, 1988
    Date of Patent: April 7, 1992
    Assignee: Union Oil Company of California
    Inventors: Dennis D. Delaney, Hugh W. Gowdy
  • Patent number: 5082492
    Abstract: A method is disclosed for polishing geothermal brines containing iron-rich silica scale and silica particles suspended therein while removing and recovering copper, silver and other precious metals dissolved therein. The method comprises passing brine having a pH just below about 5.0 through a conduit packed with a metal higher in the electromotive series than silver for a time to sufficient for substantially all of the silver and other precious metals therein to precipitate onto the packing. Preferably, the packing comprises coiled zinc-galvanized steel chicken wire mesh packed in a sufficient density to act as a filter for said suspended particles. Dissolving the packing in a suitable acid will leave a precious metal-rich residue behind for subsequent recovery. When the brine is treated this process, the useful life of injection wells used to return cooled brine back to the geothrmal field is extended by at least about 3 times as compared to that observed with untreated brine.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: January 21, 1992
    Assignee: Union Oil Company of California
    Inventors: Darrell L. Gallup, John L. Featherstone, Jessie P. Reverente, Philip H. Messer
  • Patent number: 5004480
    Abstract: Diesel fuel compositions containing dimethyl carbonate reduce pollution levels resulting when said fuel is combusted in a diesel engine.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: April 2, 1991
    Assignee: Union Oil Company of California
    Inventor: Diane D. Kanne
  • Patent number: 4990273
    Abstract: An extreme pressure, anti-wear additive for lubricating compositions which is the reaction product of a 2,5-dimercapto-1,3,4-thiadiazole, an aldehyde and a primary or secondary, aliphatic or alicyclic amine.
    Type: Grant
    Filed: November 20, 1987
    Date of Patent: February 5, 1991
    Assignee: Union Oil Company of California
    Inventor: Michael C. Croudace
  • Patent number: 4987250
    Abstract: Hydroxy sulfonic acids in general and isethionic acid (2-hydroxy ethyl sulfonic acid) in particular can be prepared at 99+% purity and good yields by the selective oxidation of a precursor hydroxy mercaptan with hydrogen peroxide. The resulting product is pure enough to be used directly in the synthesis of sulfo-acrylic esters which are finding considerable use as stabilizers in producing vinylidene chloride copolymers used for FDA approved packaging films.
    Type: Grant
    Filed: January 19, 1989
    Date of Patent: January 22, 1991
    Assignee: Union Oil Company of California
    Inventors: Dennis E. McGee, Ted S. Hallen
  • Patent number: 4939200
    Abstract: Non-formaldehyde emitting binders for nonwoven cellulosic materials comprise a solution copolymer of an olefinically unsaturated organic compound having at least one carboxylate group, which is reacted with a primary or secondary amide of an olefinically unsaturated carboxylic acid. The produce of said reaction is admixed with a non-formaldehyde containing latex carrier which has been formulated with a non-formaldehyde forming reactive monomer to produce binder compositions which reach substantially fully cured wet strength in 8 seconds or less.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: July 3, 1990
    Assignee: Union Oil Company of California
    Inventors: Dennis P. Stack, Paul J. Steinwand
  • Patent number: 4909951
    Abstract: Additives comprising an adduct of a calcium salt of a thiocarbonic acid and calcium hydroxide are useful in lubricants to enhance both the extreme pressure/anti-wear and anti-oxidation capabilities thereof. The lubricants are preferably oils of lubricating viscosity, which may be thickened to a grease-like consistency with one or more oil thickeners and contain from about 0.1 to about 20 weight percent of said adduct.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: March 20, 1990
    Assignee: Union Oil Company of California
    Inventors: Leah T. Mendelson, Richard L. Pilling
  • Patent number: 4910330
    Abstract: Hydroxy sulfonic acids in general and isethionic acid (2-hydroxy ethyl sulfonic acid) in particular can be prepared at 99+% purity and good yields by the selective oxidation of a precursor hydroxy mercaptan with hydrogen peroxide. The resulting product is pure enough to be used directly in the synthesis of sulfo-acrylic esters which are finding considerable use as stabilizers in producing vinylidene chloride copolymers used for FDA approved packaging films.
    Type: Grant
    Filed: September 25, 1987
    Date of Patent: March 20, 1990
    Assignee: Union Oil Company of California
    Inventors: Dennis E. McGee, Ted S. Hallen
  • Patent number: 4909945
    Abstract: A method is provided for removing elemental sulfur particles from a hydrogen sulfide removal process which employs a regenerable, aqueous washing solution capable of absorbing hydrogen sulfide from an industrial gas stream and converting that hydrogen sulfide to elemental sulfur. The washing solution of such a process is contacted with bubbles of an oxygen-containing gas while in the presence of an effective amount of a cationic sulfur particle-size increasing polymeric flocculent to form a sulfur-containing froth from which the sulfur is recovered.
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: March 20, 1990
    Assignee: Union Oil Company of California
    Inventor: Dennis D. Delaney
  • Patent number: 4908142
    Abstract: Additives containing a salt or complex of trithiocarbonic acid are useful in lubricants to enhance the extreme pressure/anti-wear and anti-oxidation capabilities thereof. The lubricants are preferably oils of lubricating viscosity, which may be thickened to a grease-like consistency with one or more oil thickeners, and contains from about 0.1 to about 20 weight percent of said additives.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: March 13, 1990
    Assignee: Union Oil Company of California
    Inventors: Josefina M. Dumdum, Leah T. Mendelson, Richard L. Pilling
  • Patent number: 4908143
    Abstract: Additives comprising a salt or complex of tetrathiocarbonic acid are useful in lubricants to enhance both the extreme pressure/anti-wear and anti-oxidant capabilities thereof. The lubricants preferably are oils of lubricating viscosity, which may be thickened to grease-like consistency with one or more oil thickeners, and contain from about 0.1 to about 20 weight percent of said additives.
    Type: Grant
    Filed: October 4, 1988
    Date of Patent: March 13, 1990
    Assignee: Union Oil Company of California
    Inventors: Josefina M. Dumdum, Leah T. Mendelson, Richard L. Pilling
  • Patent number: 4905762
    Abstract: A method for inhibiting the deposition of wax in an oil well producing a wax-containing petroleum from a subterranean formation comprises injecting into the oil pool at the base of said well a copolymer comprised of ethylene and vinyl acetate and having an average molecular weight between about 15,000 and about 35,000.
    Type: Grant
    Filed: December 30, 1988
    Date of Patent: March 6, 1990
    Assignee: Union Oil Company of California
    Inventor: Horst E. Zilch
  • Patent number: 4904279
    Abstract: Hydrocarbon fuels heavier than gasoline, especially diesel fuel compositions, contain carbonate additives, preferably non-aromatic, metals-free carbonates, to reduce particulate emissions therefrom when combusted in an internal combustion engine.
    Type: Grant
    Filed: January 13, 1988
    Date of Patent: February 27, 1990
    Assignee: Union Oil Company of California
    Inventors: Diane D. Kanne, Ross Y. Iwamoto
  • Patent number: 4892723
    Abstract: The long term stability of process solutions used in H.sub.2 S-to-sulfur absorption/oxidation process, wherein the incoming hydrogen sulfide-containing gas stream is contaminated with hydrocarbons and/or organic oxygenated compounds and the process is generating an excessive amount of thiosulfate in the process solution, is improved by a method comprising contacting the gas stream and/or the process solution with charcoal to remove both the contamination and at least a portion of the thiosulfate therefrom.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: January 9, 1990
    Assignee: Union Oil Company of California
    Inventors: Dennis D. Delaney, Hugh W. Gowdy
  • Patent number: 4891049
    Abstract: Hydrocarbon fuels heavier than gasoline, especially diesel fuel compositions, contain carbonate additives, preferably non-aromatic, metals-free carbonates, to reduce particulate emissions therefrom when combusted in an internal combustion engine.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: January 2, 1990
    Assignee: Union Oil Company of California
    Inventors: Diane M. Dillon, Ross Y. Iwamoto
  • Patent number: 4888053
    Abstract: A method for removing and recovering toxic heavy metal contaminants from an iron-bearing sludge is provided. The method comprises one or more cycles of a two step, controlled chloride leach comprising a first non-acidic chloride leaching solution and a second acidic chloride leaching solution, wherein said toxic heavy metals are separated from said sludge and said iron-bearing sludge is a substantially non-hazardous material.
    Type: Grant
    Filed: July 7, 1988
    Date of Patent: December 19, 1989
    Assignee: Union Oil Co. of California
    Inventors: Gerard Grayson, Morton M. Wong
  • Patent number: 4829102
    Abstract: Polymer opaque particles and a process for making same are disclosed. These particles comprise an emulsion polymerized core copolymer having, as one constituent thereof, between about 15% and about 40% by weight of a monomer having the general formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.4 are independently selected from hydrogen, nitro, amino nitrile, hydroxyl and halogen groups, and organic radicals such as substituted or unsubstituted alkyl, cycloalkyl or aryl groups, R.sub.3 is selected from hydrogen or substituted or unsubstituted organic radicals such as alkyl, cycloalkyl or aryl groups and A is an organic or inorganic bridge connecting the illustrated atoms, the remainder being a mixture of selected olefinically unsaturated acid and ester monomers, said core particles, in turn being encapsulated with an emulsion polymerized sheath copolymer comprised of one or more nonionic olefinically unsaturated monomers to produce said opague particles.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: May 9, 1989
    Assignee: Union Oil Company of California
    Inventor: John Biale
  • Patent number: 4773916
    Abstract: The octane requirement increase phenomenon in a spark ignition internal combustion engine is controlled by introducing with the combustion charge a fuel composition containing an octane requirement increase-inhibiting amount of a compound selected from the group consisting of fused aromatics having at least 2, preferably between 3 and 5, aromatic rings with no heteroatoms substituted in the rings. The polynuclear aromatics can be either unsubstituted or substituted with groups other than an alkyl group. Usually the polynuclear aromatic is added to the fuel in an amount between about 0.1 and 5.0 weight percent of the fuel. In particular, anthracene and phenanthrene, and their non-alkyl derivatives, provide effective octane requirement increase-inhibiting additives for unleaded gasoline.
    Type: Grant
    Filed: March 11, 1987
    Date of Patent: September 27, 1988
    Assignee: Union Oil Company of California
    Inventors: Michael C. Croudace, Timothy Wusz, Stephen G. Brass