Patents Represented by Attorney Ralph C. Medhurst

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  • Tailored laser system
    Patent number: 5062117
    Abstract: A laser system comprising: a holder having one end which is adapted to receive pumping light from a source and having an opposite end which transmits laser light to an optical fiber, the holder defining a predetermined axis of propagation which extends between its ends; and a lasant material which is carried by the holder between the ends of the holder and which is located by the holder at an angle which is measured between at least one optical axis and the axis of propagation and which has a magnitude from zero to ninety degrees.
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: October 29, 1991
    Assignee: Amoco Corporation
    Inventors: Douglas W. Anthon, Alan T. Eggleston, Gregory R. Ristau
  • Oil stabilization
    Patent number: 5059303
    Abstract: A method for stabilizing oil is provided. An oil fraction having hydrocarbons with an initial boiling point of about 200.degree. F. to about 1050.degree. F. is hydrotreated to reduce the nitrogen content of the oil fraction to be stabilized. Subsequently, condensed aromatic compounds are selectively extracted from the hydrotreated oil fraction to yield a stable oil fraction.
    Type: Grant
    Filed: June 16, 1989
    Date of Patent: October 22, 1991
    Assignee: Amoco Corporation
    Inventors: James L. Taylor, Albert L. Hensley, John M. Forgac, David F. Tatterson
  • Tin-containing composition and use
    Patent number: 5059740
    Abstract: A tin-containing composition is provided, the composition having a tin Auger line transition wherein the ratio of the area of the M.sub.5 N.sub.4,5 N.sub.4,5 transition peak at 424.5 eV.+-.1 eV, having a 6 eV FWHM, to the area of M.sub.4 N.sub.4,5 N.sub.4,5 transition peak at 430.5 eV.+-.1 eV is at least 10 to 1. Additional such tin-containing compositions, including catalyst compositions are also provided as are methods for converting feedstock alkanes containing from 1 to 4 carbon atoms to higher molecular weight hydrocarbons using such catalyst compositions.
    Type: Grant
    Filed: June 25, 1990
    Date of Patent: October 22, 1991
    Assignee: Amoco Corporation
    Inventors: Mark P. Kaminsky, Mark S. Kleefisch, Gerry W. Zajac
  • Solids-liquid separation
    Patent number: 5059331
    Abstract: A method and a system for separating solids from a solids-containing liquid feed is disclosed wherein ultrasonic energy is applied to a fouled separation element in situ in the separator unit associated with the element while the element is immersed in a liquid to effect removal therefrom of solids fouling the elements and wherein the separation element is backflushed with a backflush liquid.
    Type: Grant
    Filed: March 6, 1990
    Date of Patent: October 22, 1991
    Assignee: Amoco Corporation
    Inventor: Shri K. Goyal
  • Manufacture of AMS-18 crystalline borosilicate molecular sieve
    Patent number: 5053211
    Abstract: AMS-1B crystalline borosilicate molecular sieve is prepared by reacting under crystallization conditions, in substantial absence of a metal or ammonium hydroxide, an aqueous mixture containing an oxide of silicon, an oxide of boron, an alkylammonium cation or a precursor of an alkylammonium cation, and ethylenediamine, and the product formed from such method.
    Type: Grant
    Filed: June 15, 1987
    Date of Patent: October 1, 1991
    Assignee: Amoco Corporation
    Inventor: Muin S. Haddad
  • Multistage ethylbenzene dehydrogenation process with split-flow hydrocarbon feed
    Patent number: 5053572
    Abstract: An improved multistage ethylbenzene dehydrogenation process comprising feeding steam and a major fraction of a hydrocarbon feed to a first reactor and feeding a remaining minor fraction of the hydrocarbon feed and a product of the first reactor to a second reactor.
    Type: Grant
    Filed: September 18, 1990
    Date of Patent: October 1, 1991
    Assignee: Amoco Corporation
    Inventors: Dae K. Kim, George M. Longland, Jr.
  • Lower alkane conversion
    Patent number: 5053578
    Abstract: A method for converting a feedstock alkane containing from 1 to 3 carbon atoms to a higher molecular weight hydrocarbon comprising contacting a feedstock with an oxygen-containing gas in the presence of a catalytic composition is disclosed. The catalytic composition includes a Group IA metal, a Group IIA metal and a third component, the precursor of which is a sol such as an aqueous suspension of a metal such as aluminum, silicon, titanium, zinc, zirconium, cadmium or tin with which the other components of the composition are thoroughly dispersed.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: October 1, 1991
    Assignee: Amoco Corporation
    Inventors: Glenn O. Michaels, Michael J. Spangler
  • Electric field induced quantum well waveguides
    Patent number: 5048907
    Abstract: The invention is directed to laterally confined optical waveguide devices in semiconductors using quantum-well structures. An optical waveguide having a core comprising at least one quantum-well structure is interposed between first and second cladding regions such that an optical beam inserted into the core region spreads laterally with respect to a primary direction of the beam. Contacts are fabricated on the surface of the top cladding region and serve as means for applying an electric field to the core of the waveguide. The electric field induces a change in the refractive index of the portion of the quantum-well structure within the field. The change in the refractive index functions to laterally confine the propagation of the optical beam to the region of the core within the electric field, while maintaining a low loss transmission.
    Type: Grant
    Filed: February 23, 1990
    Date of Patent: September 17, 1991
    Assignee: Amoco Corporation
    Inventors: Randy W. Wickman, Anthony L. Moretti
  • Integrated process for the preparation of polycarbonate and/or polyarylate block copolymers with poly(aryl ethers)
    Patent number: 5047486
    Abstract: A process for the preparation of poly(aryl ether) block copolymers with polycarbonates and/or polyarylates comprising the steps ofa) reacting a hydroxy-terminated poly(aryl ether) with a high molecular weight aromatic polycarbonate, or a high molecular weight polyarylate, or a high molecular weight poly(arylatecarbonate) to yield a block copolymer; followed byb) coupling the material obtained in step a) under poly(aryl ether) forming conditions via the hydroxyl/activated dihalobenzenoid compound, or the hydroxyl/activated dinitrobenzenoid compound polycondensation processis described.The polymerization is preferably performed in an integrated manner starting with the poly(aryl ether)-forming monomers and using a polar aprotic solvent. Materials with an overall excellent combination of properties are obtained.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: September 10, 1991
    Assignee: Amoco Corporation
    Inventor: Selvaraj Savariar
  • Process for producing tubular film from thermoplastic molten material
    Patent number: 5045254
    Abstract: A process for producing tubular film from a thermoplastic molten material, including supplying an annular stream of thermoplastic material through a passageway substantially free of flow interurptions having a plurality of axially aligned-annularly spaced feed ports, funneling and recombining the annular stream of thermoplastic material after being supplied through the feed ports to evenly recombine the thermoplastic material, and forming a tubular stream of thermoplastic film having a substantially uniform thickness throughout.
    Type: Grant
    Filed: March 6, 1990
    Date of Patent: September 3, 1991
    Assignee: Amoco Corporation
    Inventors: Paul L. Peelman, Edward A. Malosh
  • Process for deodorizing isobutylene polymer
    Patent number: 5043420
    Abstract: A process to hydrogenate and deodorize a polyisobutylene polymer of from 100 to 4000 molecular weight and cosmetic dermatological compositions containing the hydrogenated, deodorized polyisobutylene polymers are disclosed.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: August 27, 1991
    Assignee: Amoco Corporation
    Inventors: Egils Vitands, Kelley R. Lane
  • Crystalline rare earth aluminum borates
    Patent number: 5043308
    Abstract: The preparation, structure, and properties of solid inorganic materials containing at least one rare earth element, aluminum, boron and oxygen are described. Also described is the use of such materials in catalytic compositions for the conversion of organic compounds. In particular, new materials comprising crystalline LnAl.sub.1.67+0.67X (B.sub.4 O.sub.10)O.sub.X where Ln is at least one Group IIIB element ion having effective ionic radii less than about 0.98 Angstroms at valence 3+ and coordination number VI, and X is a number ranging from 0 to 1, having a characteristic X-ray diffraction pattern are described as well as the use of such materials in various catalyzed processes including oxidative dehydrogenation of hydrocarbons and oxygen-containing hydrocarbons, dehydrogenation to functionalize alkylaromatic compounds, and ammoxidation of alkylaromatic compounds.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: August 27, 1991
    Assignee: Amoco Corporation
    Inventors: Melvin L. Luetkens, Jr., Larry C. Satek
  • Catalysts for upgrading light paraffins
    Patent number: 5043306
    Abstract: The present invention relates to a process for producing aromatic compounds from a hydrocarbon gas containing C.sub.3 through C.sub.5 paraffinic hydrocarbons under conversion conditions in the presence of a catalyst comprising a borosilicate molecular sieve, a platinum metal component and a gallium metal component.
    Type: Grant
    Filed: April 13, 1990
    Date of Patent: August 27, 1991
    Assignee: Amoco Corporation
    Inventor: Victor K. Shum
  • Quenching downstream of an external vapor catalyst separator
    Patent number: 5043058
    Abstract: Effective quenching is provided in a catalytic cracking process to increase product yield and decrease thermal cracking. To this end, the quench is injected at special locations and a special quench is used. In the illustrated embodiment, the quench is injected into the oil product immediately downstream of an external gross cut separator before the product enters a disengaging vessel and the quench comprises cycle oil.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: August 27, 1991
    Assignee: Amoco Corporation
    Inventors: John M. Forgac, F. William Hauschildt, George P. Quinn, Douglas N. Rundell, John G. Schwartz, Mark S. Camp
  • Oxygen addition to a coking zone and sludge addition with oxygen addition
    Patent number: 5041207
    Abstract: A process is disclosed wherein at least two separate gaseous oxygen streams are passed into a coker transfer line to effect oxidation of a portion of the feed passing through the transfer line. Another aspect of the process is disclosed wherein gaseous oxygen is passed into a coking process and sludge is also passed into the coking process.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: August 20, 1991
    Assignee: Amoco Corporation
    Inventors: Joseph A. Harrington, Ciro D. Sorrentino, Dean G. Venardos, Shri K. Goyal, Irwin Ginsburgh
  • Process for synthesizing 4,4'-dihydroxydiphenyl sulfone
    Patent number: 5041677
    Abstract: Process for synthesizing 4,4' bisphenol sulfone involving reacting phenol and sulfuric acid in an inert reaction solvent, and maintaining the reaction solvent at temperatures of about 160 to 200.degree. C. and at a predetermined level sufficient to maintain a saturated 4,4' isomer solution and an unsaturated 2,4' isomer solution, thereby selectively yielding 4,4' bisphenol sulfone with minimal amounts of 2,4' isomer by-product.
    Type: Grant
    Filed: March 28, 1990
    Date of Patent: August 20, 1991
    Assignee: Amoco Corporation
    Inventors: Bernard Cooker, Fred Zemlanicky
  • Process for the production of an aromatic polycarboxylic acid
    Patent number: 5041633
    Abstract: A method for producing an aromatic polycarboxylic acid by oxidizing an aromatic feed compound having at least 3 oxidizable ring substituents, wherein, after initiation of the oxidation water from an external source is added and the reaction temperature is raised.
    Type: Grant
    Filed: April 28, 1987
    Date of Patent: August 20, 1991
    Assignee: Amoco Corporation
    Inventors: Walter Partenheimer, Gregory P. Hussmann, Juergen K. Holzhauer, Stephen V. Hoover
  • Polypropylene with improved impact properties
    Patent number: 5041491
    Abstract: A modified propylene polymer composition of improved low temperature impact resistance comprising about 55 to about 80 weight percent polypropylene homopolymer, about 15 to about 30 weight percent linear low density polyethylene and about 5 to about 15 weight percent polybutene.
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: August 20, 1991
    Assignee: Amoco Corporation
    Inventors: Richard M. Turke, Robin M. Gryziecki, David V. Howe
  • Copolyesters
    Patent number: 5039717
    Abstract: Injection-moldable copolyesters of terephthalate units, ethylene units and a high proportion (e.g. 82-87) mole %) of oxybenzoate units, and cookware made of such copolyesters. Process for making such copolyesters by reacting polyethylene terephthalate with p-acetoxybenzoic acid in a solvent, first at a temperature below 240.degree. C. to product a fragmented polyester, raising the temperature to split off acetic acid, then adding more acetoxybenzoic acid to raise the oxybenzoate content to more than 80 mole %.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: August 13, 1991
    Assignee: Amoco Corporation
    Inventors: James H. Kawakami, Lloyd M. Robeson, Bernard Cooker, Lee P. McMaster, Louis M. Maresca
  • Single baffle tile for fixed heater for oil refineries
    Patent number: D320848
    Type: Grant
    Filed: June 17, 1988
    Date of Patent: October 15, 1991
    Assignee: Amoco Corporation
    Inventors: Ronald L. Cutshall, Frank L. Groenewold, Martin F. Brennan