Patents Assigned to Atlantic Richfield Company
  • Lubricant removal system for a cold rolling mill
    Patent number: 4552003
    Abstract: An improved lubricant and coolant removal system for a roll stand includes suction boxes surrounding the sheet formed by the roll stand and a series of pipes connecting the suction boxes to various coolant traps. Special doctor blades and air knives remove coolant from the rolls. An enclosing shroud prevents coolant overspray and mist from escaping.
    Type: Grant
    Filed: April 4, 1985
    Date of Patent: November 12, 1985
    Assignee: Atlantic Richfield Company
    Inventor: Ronald E. Kolecki
  • Decomposition of hydroperoxides in the presence of homogeneous binary catalysts
    Patent number: 4551553
    Abstract: The process of decomposing a hydroperoxide by contacting the hydroperoxide with a catalytic quantity of a catalyst system comprised of chromium and ruthenium. The catalyst system is characterized by its high stability while exhibiting improved activity for hydroperoxide decomposition and selectivity to desired alcohol and ketone products.
    Type: Grant
    Filed: February 22, 1983
    Date of Patent: November 5, 1985
    Assignee: Atlantic Richfield Company
    Inventors: Paul D. Taylor, Michael T. Mocella
  • Acrylic hot melt pressure sensitive adhesive coated sheet material
    Patent number: 4551388
    Abstract: Acrylic pressure sensitive hot melt adhesives having improved creep resistance at ambient temperatures and desirable melt viscosity at elevated application temperatures are prepared by copolymerizing suitable acrylic and methacrylic acids and alkyl esters with 10-40 percent by weight of an acrylate or methacrylate terminated vinyl aromatic monomer based macromolecular monomer. The adhesives are coated onto flexible backing material to form labels, decals, tapes, and other sheet materials.
    Type: Grant
    Filed: June 27, 1983
    Date of Patent: November 5, 1985
    Assignee: Atlantic Richfield Company
    Inventor: James A. Schlademan
  • Surface improvement of semiconductors in high speed casting
    Patent number: 4551291
    Abstract: Apparatus and method for producing semiconductor ribbon directly from the molten state by contact with a moving chill surface wherein water vapor is introduced to improve ribbon top surface smoothness.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: November 5, 1985
    Assignee: Atlantic Richfield Company
    Inventors: G. Felix Wakefield, David L. Bender, Samuel N. Rea
  • Process for converting molybdenite to molybdenum oxide
    Patent number: 4551312
    Abstract: A process for converting molybdenite to molybdenum oxide by a flash roasting process wherein the molybdenum calcine produced in the flash roasting process is subsequently treated with a free chlorine-containing aqueous solution.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: November 5, 1985
    Assignee: Atlantic Richfield Company
    Inventor: William A. Yuill
  • Process for separating molybdenite from a molybdenite-containing copper sulfide concentrate
    Patent number: 4549959
    Abstract: A process for selectively separating molybdenum from a molybdenite-containing copper sulfide concentrate by a flotation process wherein the molybdenite is selectively floated by the use of a sulfite or bisulfite compound as a copper sulfide depressant.
    Type: Grant
    Filed: October 1, 1984
    Date of Patent: October 29, 1985
    Assignee: Atlantic Richfield Company
    Inventors: Raynor O. Armstrong, Daniel A. Norrgran, William A. Yuill
  • Method and apparatus for pre-dilution of drilling mud slurry and the like
    Patent number: 4548525
    Abstract: An aqueous slurry of spent drilling mud and/or produced water is diluted prior to free discharge into a body of receiving water by expelling a jet stream of such slurry into an open-ended submerged mixing conduit. The jet stream aspirates and entrains the surrounding water within the conduit and is then passed through a mixer stage prior to exiting the opposite end of the tube.
    Type: Grant
    Filed: December 13, 1982
    Date of Patent: October 22, 1985
    Assignee: Atlantic Richfield Company
    Inventor: William F. Priebe
  • Methane conversion
    Patent number: 4547611
    Abstract: An improved method for converting methane to higher hydrocarbon products by contacting a gas comprising methane and an oxidative synthesizing agent at synthesizing conditions, the improvement which comprises contacting methane with a solid comprising a promoting amount of alkali metal and/or compounds thereof, said solid being associated with a support selected from the group consisting of alkaline earth metals and compounds thereof. Magnesia is a particularly preferred support.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: October 15, 1985
    Assignee: Atlantic Richfield Company
    Inventors: C. Andrew Jones, John A. Sofranko
  • Method for discharging treated coal and controlling emissions from a heavy oil spray system
    Patent number: 4547198
    Abstract: A method for discharging heavy oil treated particulate coal and controlling emissions from a heavy oil spray contacting vessel is disclosed. In particular, a bed of heavy oil treated coal is maintained in the lower portion of the oil spray contacting vessel. The heavy oil treated coal is withdrawn from the bottom of the bed while maintaining the bed at a sufficient depth to remove a major portion of the heavy oil mist from gaseous materials within the vessel. A major portion of gaseous materials are made to pass downwardly through the bed.
    Type: Grant
    Filed: March 29, 1984
    Date of Patent: October 15, 1985
    Assignee: Atlantic Richfield Company
    Inventor: James L. Skinner
  • Impregnation suspension system for expandable styrene/maleic anhydride particles
    Patent number: 4547527
    Abstract: The absorption of water by styrene/maleic anhydride copolymer particles during the impregnation of the particles in aqueous suspension is greatly reduced by the addition of salt to the impregnation system.This process produces expandable particles of non-equimolar copolymers of styrene and maleic anhydride having considerable less heterogeneity, finer cell structure, greater expandability, less heat sensitivity, less shrinkage, and lower density potential on molding.
    Type: Grant
    Filed: December 10, 1984
    Date of Patent: October 15, 1985
    Assignee: Atlantic Richfield Company
    Inventor: Alvin R. Ingram
  • Process for preparing hydrogen peroxide
    Patent number: 4547354
    Abstract: An improved process for the acid-catalyzed hydrolysis tertiary butyl hydroperoxide to form hydrogen peroxide wherein an organic solvent is added to the hydrolysis zone, which solvent promotes the partitioning of hydrogen peroxide and oxidizable organic material into separate aqueous and organic phases, respectively.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: October 15, 1985
    Assignee: Atlantic Richfield Company
    Inventor: Frances S. Pinault
  • Methane conversion process
    Patent number: 4547607
    Abstract: A method is disclosed for converting methane to higher hydrocarbon product by contacting the methane with a solid which comprises a reducible metal oxide which when contacted with methane at a temperature within the range of about 500.degree. to 1000.degree. C. is reduced and produces higher hydrocarbon products and water, the improvement comprising recycling C.sub.2 + alkanes recovered during subsequent processing of the effluent produced by the contacting to the contacting step.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: October 15, 1985
    Assignee: Atlantic Richfield Company
    Inventors: C. Andrew Jones, John J. Leonard, John A. Sofranko
  • Method and apparatus for production of a metal from metallic oxide ore using a composite anode
    Patent number: 4547272
    Abstract: An anode of a mixture of reducing agent and metal oxide particulates is inserted into an electrolytic solvent bath under compression. In forming the particulate anode, the materials of construction are selected such that there is a minimum number of particle contacts. In such a selection, the contact surface area is important and is determined primarily by particle size. The compression of the anode is maintained to deform the particles during electrolysis.
    Type: Grant
    Filed: December 14, 1983
    Date of Patent: October 15, 1985
    Assignee: Atlantic Richfield Company
    Inventor: Jack Y. Josefowicz
  • Hydrocarbon oils with improved pour points
    Patent number: 4547202
    Abstract: Hydrocarbon oils containing, as a pour point depressant, a copolymer of an alkyl acrylate, the alkyl group of which contains about 12 to 40 carbon atoms and an vinylidene olefin having about at least 16 carbon atoms, the copolymer having a weight average molecular weight of about 1,000 to 100,000.
    Type: Grant
    Filed: December 5, 1983
    Date of Patent: October 15, 1985
    Assignee: Atlantic Richfield Company
    Inventor: Richard F. Miller
  • Methane conversion
    Patent number: 4547610
    Abstract: An improved method for converting methane to higher hydrocarbon products by contacting a gas comprising methane and a reducible metal oxide under synthesis conditions, the improvement which comprises performing the contacting in the presence of oxides of nitrogen. Nitrous oxide is a preferred nitrogen oxide.
    Type: Grant
    Filed: November 8, 1984
    Date of Patent: October 15, 1985
    Assignee: Atlantic Richfield Company
    Inventors: John A. Sofranko, Howard P. Withers, Jr.
  • Unitary plate electrode
    Patent number: 4547443
    Abstract: The unitary electrode (10) comprises a porous sheet (12) of fiberglass the strands (14) of which contain a coating (16) of conductive tin oxide. The lower portion of the sheet contains a layer (18) of resin and the upper layer (20) contains lead dioxide forming a positive active electrode on an electrolyte-impervious layer. The strands (14) form a continuous conduction path through both layers (16, 18). Tin oxide is prevented from reduction by coating the surface of the plate facing the negative electrode with a conductive, impervious layer resistant to reduction such as a thin film (130) of lead or graphite filled resin adhered to the plate with a layer (31) of conductive adhesive. The plate (10) can be formed by casting a molten resin from kettle (60) onto a sheet of glass wool (56) overlying a sheet of lead foil and then applying positive active paste from hopper (64) into the upper layer (68).
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: October 15, 1985
    Assignees: Atlantic-Richfield Company, California Institute of Technology
    Inventors: John J. Rowlette, Thomas J. Clough, Jack Y. Josefowicz, John W. Sibert
  • Methane conversion using a silica/magnesia support
    Patent number: 4547608
    Abstract: An improved method for converting methane to higher hydrocarbon products by contacting a gas comprising methane with a contact agent at a selected temperature, the agent comprising a reducible metal oxide, a support of at least two oxides, and an alkali metal.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: October 15, 1985
    Assignee: Atlantic Richfield Company
    Inventor: Marvin F. L. Johnson
  • Method for staged cooling of particulate solids
    Patent number: 4545132
    Abstract: An improved method for cooling particulate solids in an expanded bed by successively charging the particulate solids to a plurality of expanded beds with the exhaust gas from each of the plurality of expanded beds being discarded.
    Type: Grant
    Filed: April 6, 1984
    Date of Patent: October 8, 1985
    Assignee: Atlantic Richfield Company
    Inventors: Ying H. Li, Bernard F. Bonnecaze
  • Process for the recovery of a mineral
    Patent number: 4545620
    Abstract: The present invention relates to an improved process for the solution mining of a mineral from a subterranean formation. More specifically, the invention relates to an improved process which enhances significantly the recovery of a mineral from a subterranean formation via solution mining. The improvement comprises periodically ceasing injection of leach solution while continuing production to alter the path of flow of the leach solution between an injection well and a production well and subsequently injecting leach solution.
    Type: Grant
    Filed: December 15, 1978
    Date of Patent: October 8, 1985
    Assignee: Atlantic Richfield Company
    Inventor: Daniel J. Curtin
  • Preparative process for supports
    Patent number: 4544787
    Abstract: An improved process for the production of a contact agent comprising digesting a reducible oxide of at least one metal, the oxide of which forms a reduced metal oxide, and a support in the presence of a silicon component, drying the precipitate of the reducible oxide and calcining the precipitate to form the contact agent.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: October 1, 1985
    Assignee: Atlantic Richfield Company
    Inventor: E. William Breder, Jr.