Patents Represented by Attorney Robert A. Kulason
  • Patent number: 5189073
    Abstract: A process for the production of expanded polyurea elastomers which comprises reacting:a) an aliphatic polyetheramine having primary amino functions and essentially no free hydroxyl groups;b) carbon dioxide in the form of carbamate, obtained by reacting carbon dioxide with a portion of the aliphatic polyetheramines;c) a polyisocyanate;d) water; ande) a catalyst having a tertiary amino group;in the presence off) an inert, halogen-free blowing agent.
    Type: Grant
    Filed: March 19, 1992
    Date of Patent: February 23, 1993
    Assignee: Texaco Chemical Co.
    Inventors: Heiko Humbert, Werner Klockemann, Dudley J. Primeaux, II
  • Patent number: 5183482
    Abstract: Mixture of gases such as hydrogen/carbon dioxide may be separated by use of membrane formed by reaction of an aluminum alkoxide with steam at high temperatures and pressures.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: February 2, 1993
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Martin D. Hilmar
  • Patent number: 5183478
    Abstract: Quenched slag discharged from a gasification process such as a coal gasification process can be continually dewatered and removed without disrupting operations by alternately discharging the quenched slag from means such as lockhoppers and directing the slag to one of two disengagement zones symmetrically arranged on either side of a clear water pit. The slag settles along a sloping active disengagement zone, allowing water to separate and drain into an adjacent slag pit. The accumulated water is drained into the clear water pit through vertically-spaced drains in the walls separating the slag pits from the clear water pit and pumped away after solids have settled. After an active disengagement zone-slag pit is used for a period of time, perhaps 24 hours, the discharge of slag is redirected to the other such area while dewatered slag is removed from the first slag pit.
    Type: Grant
    Filed: December 15, 1991
    Date of Patent: February 2, 1993
    Assignee: Texaco Inc.
    Inventors: Douglas K. Holland, Edward W. Dillingham
  • Patent number: 5182022
    Abstract: Charge aqueous solution containing 85 w % ethylene glycol is concentrated by pervaporation across a sulfonated polyethylene membrane to yield retentate containing 95 w % ethylene glycol.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: January 26, 1993
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, John Reale, Jr.
  • Patent number: 5182247
    Abstract: Normal olefins such as n-butene can be converted to branched species by skeletal isomerization over catalysts containing solid acids prepared by sulfating catalyst precursors containing hydrous metal oxides--e.g., aluminas, silica-aluminas or clays treated with sulfuric acid, metal sulfates, sulfur trioxide or organic sulfates. The catalyst precursors are sulfated sufficiently to produce the desired skeletal isomerization without substantial cracking under suitable isomerization conditions.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: January 26, 1993
    Assignee: Texaco Inc.
    Inventors: Erven J. Kuhlmann, James R. Pascoe, James E. Browne, Kevin J. Martin
  • Patent number: 5181941
    Abstract: A novel membrane system, including a layer of platinum or palladium on graphite, is used to separate hydrogen from a hydrocarbon stream.
    Type: Grant
    Filed: December 16, 1991
    Date of Patent: January 26, 1993
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Carl A. Hultman
  • Patent number: 5182041
    Abstract: An additive composition comprising a graft and amine-derivatized polymer having an average molecular weight ranging from about 300 to 3500 which has been reacted with at least one olefinic carboxylic acid acylating agent to form one or more acylating reaction intermediates characterized by having a carboxylic acid acylating function within their structure and reacting said reaction intermediate with an amino-aromatic polyamine compound from the group consisting of an N-arylphenylenediamine, an aminothiazole, an aminocarbazole, an amino-indazolinone, an aminomercaptotriazole and an aminoperimidine to form said graft and amine-derivatized copolymer, and a lubricating oil composition containing same are provided.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: January 26, 1993
    Assignee: Texaco Inc.
    Inventors: Nicholas Benfarmeo, Theodore E. Nalesnik
  • Patent number: 5182038
    Abstract: A lubricating oil composition having improved dispersancy and a low nitrogen content. The dispersant additive contained in the oil composition being prepared by first forming mono- and/or bis-alkenyl succinimides, with, respectively, an amidoamine, and a phenol and an aldehyde. Then, the succinimides are combined to provide the desired dispersant additive product.
    Type: Grant
    Filed: April 24, 1991
    Date of Patent: January 26, 1993
    Assignee: Texaco, Inc.
    Inventors: Shailaja M. Shirodkar, George P. Speranza
  • Patent number: 5176896
    Abstract: An apparatus and method for the generation of a control signal for the optimization of sulfur removal in a Claus process unit comprises oxidizing a portion of the tail gas stream exiting the Claus unit by contacting a portion of the tail gas with an oxygen-containing gas in the presence of a catalyst which oxidizes H.sub.2 S to SO.sub.2, measuring the temperature rise associated with the oxidation reaction, converting the measurement to an appropriate control signal, and using the signal to control the rate of air flow into the Claus unit.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: January 5, 1993
    Assignee: Texaco Inc.
    Inventor: Frank A. Bela
  • Patent number: 5174380
    Abstract: A gas venting apparatus for an offshore installation which vents excess gas produced from a liquid producing well. Said apparatus, including a flame extinguishing feature comprised of an elongated tube which depends from the flow tip of a gas venting conductor. To extinguish an accidentally ignited gas-fed flame, and to concurrently cool the flow tip, a weighted closure plate assembly is maintained in open position at the conductor flow tip. A high velocity stream of water directed against the closure assembly urges a closure plate into sealing engagement with the gas conductor, thereby choking off the flame, and terminating the gas flow.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: December 29, 1992
    Assignee: Texaco Inc.
    Inventor: Jerry J. Marcotte
  • Patent number: 5171449
    Abstract: Charge compositions containing aqueous mixtures of organic nitrogen compounds may be separated by pervaporation through a membrane assembly containing a porous ceramic support bearing as separating layer, polyvinyl alcohol which has been cross-linked as with glutaraldehyde.
    Type: Grant
    Filed: January 6, 1992
    Date of Patent: December 15, 1992
    Assignee: Texaco Inc.
    Inventors: Mordechai Pasternak, Uygur Kokturk
  • Patent number: 5171462
    Abstract: Mixtures of block alkoxy co- or terpolymer hydrocarboxylates and aminopolyazole increase the oxidation and corrosion resistance of lubricants, particularly diesel engine oil.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: December 15, 1992
    Assignee: Texaco Inc.
    Inventors: Thomas F. DeRosa, Rodney L. Sung, Benjamin J. Kaufman, Ronald L. O'Rourke
  • Patent number: 5171819
    Abstract: A polyurea elastomer is disclosed. The elastomer includes an isocyanate, an amine terminated polyoxyalkylene polyol, and a chain extender. The isocyanate is preferably a quasi-prepolymer of an isocyanate and a material selected from at least one polyol, a high molecular weight polyoxyalkyleneamine or a combination thereof. The chain extender includes at least an alkyl substituted piperazine.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: December 15, 1992
    Assignee: Texaco Chemical Company
    Inventors: Wei-Yang Su, Dudley J. Primeaux, II, Donald H. Champion
  • Patent number: 5169546
    Abstract: An additive, a lubricating oil composition which incorporates the additive, and a concentrate for a lubricating oil are disclosed. The additive includes (a) a halogenated copolymer prepared from ethylene, a C.sub.3 to C.sub.18 alpha-olefin, preferably a C.sub.3 to C.sub.8, or mixtures thereof, and at least one halogen, and (b) an amino-aromatic polyamine compound. Most preferably, the copolymer is prepared from ethylene, propylene and at least one polyene.The lubricating oil composition comprises a major amount of an oil of lubricating viscosity and a minor amount, effective to impart viscosity index improvement, dispersancy and antioxidant properties to the oil, of the prescribed additive.The concentrate comprises a diluent oil of lubricating oil viscosity and from about 1 to about 50 weight percent of the prescribed additive based on the total weight of the concentrate.
    Type: Grant
    Filed: July 2, 1990
    Date of Patent: December 8, 1992
    Assignee: Texaco Inc.
    Inventors: Theodore E. Nalesnik, Sheldon Herbstman
  • Patent number: 5169822
    Abstract: A catalyt composition for removal of sulfur and nitrogen in the hydroprocessing refinery of hydrocarbon streams. The composition comprises supported molybdenum or tungsten and containing cobalt or nickel. In addition, the presence of a third metal selected from the group consisting of titaniun, zirconium, and hafnium, deposited in a non-aqueous fashion, is provided.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: December 8, 1992
    Assignee: Texaco Inc.
    Inventors: Jeffrey G. Weissman, Gerald G. Sandford, Max R. Cesar
  • Patent number: 5167845
    Abstract: A polymeric lubricant additive that behaves as a viscosity index improver and imparts enhanced anti-oxidancy, dispersnacy, and anti-wear properties to said lubricant oil has been prepared. The polymeric substrate is a random co- or terpolyer of ethylene propylene and a third monomer onto which an ethylenically unsaturated carboxylic acid or acid anhydride has been grafted. The polymer is imidized with aminoheterocyclics and hydroxylalkylated using an aldehyde or ketone an alkylation; than alkylated using mercaptoheterocyclics.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: December 1, 1992
    Assignee: Texaco Inc.
    Inventors: Thomas F. DeRosa, Rodney L. Sung, Benjamin J. Kaufman, Rosemary J. Jennejahn
  • Patent number: 5166905
    Abstract: A marine seismic system includes a streamer cable which is towed by a vessel in a body of water. The streamer cable includes a plurality of hydrophones located at predetermined positions in the streamer cable which receives vibrations resulting from a seismic event occurring in the water, and provides signals corresponding to the received vibrations. The streamer cable also includes a plurality of receivers located at predetermined position in the streamer cable. Each receiver receives acoustical signals provided by acoustical sources and provide electrical signals corresponding to the received acoustical signals. A seismic event source provides a seismic event in the water. A plurality of acoustical sources cooperating with the seismic event source also provides encoded acoustical signals into the water when the seismic event source provides a seismic event.
    Type: Grant
    Filed: October 21, 1991
    Date of Patent: November 24, 1992
    Assignee: Texaco Inc.
    Inventor: William S. Currie
  • Patent number: 5165450
    Abstract: Valve means includes a first pipe which receives a signal fluid stream. The stream is separated into two substreams in accordance with a control signal. A second and third pipe are connected to the separating apparatus provides the substreams external to the valve.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: November 24, 1992
    Assignee: Texaco Inc.
    Inventor: John D. Marrelli
  • Patent number: 5163290
    Abstract: Method and apparatus for initiating electrical preheating of the catalytic converter the exhaust gas system of an internal combustion engine. The latter includes an ignition system having a battery as the engine starting medium, which is provisionally connected to the catalytic converter's heater element to raise the catalytic converter from ambient temperature, to an intermediate temperature, and subsequently to a temperature at which the catalytic converter will most effectively function.
    Type: Grant
    Filed: March 11, 1992
    Date of Patent: November 17, 1992
    Assignee: Texaco Inc.
    Inventor: James W. Kinnear
  • Patent number: 5162268
    Abstract: Vanadium garnet materials and a method for their preparation. The vanadium garnet material has a trivalent vanadium cation and a composition that falls within a specific prismatic-shaped volume in a quaternary composition diagram of MnO, CaO, V.sub.2 O.sub.3, and SiO.sub.2. In the process, specific amounts of separately pre-heated V.sub.2 O.sub.3, MnO, CaO and SiO.sub.2 powders are ground and mixed together, pelletized, heated at a temperature in the range of about 1100.degree. C. to 1400.degree. C. for 12 to 48 hours in an atmosphere of carefully selected oxygen pressure comprising a gas mixture of high purity CO.sub.2 and H.sub.2 to produce a liquid melt, and cooling, crystallizing out and separating said vanadium garnet material. A typical vanadium garnet material has the formula Mn.sub.1.3 Ca.sub.1.7 V.sub.2 Si.sub.3 O.sub.12. The vanadium garnet materials may be used in laser applications.
    Type: Grant
    Filed: August 12, 1991
    Date of Patent: November 10, 1992
    Assignee: Texaco Inc.
    Inventors: Arnulf Muan, Mitri S. Najjar