Patents Examined by Valerie D. Fee
  • Patent number: 5597514
    Abstract: A corrosion inhibitor formulation for use in reinforced concrete structures, the inhibitor reducing the rate of corrosion in metallic reinforcing rods placed within the structures. The formulation comprises a mixture of benzoic acid, aldonic acid, and a triazole such as benzotriazole or tolyltriazole.
    Type: Grant
    Filed: January 24, 1995
    Date of Patent: January 28, 1997
    Assignee: Cortec Corporation
    Inventors: Boris A. Miksic, Christophe Chandler, Margarita Kharshan, Alla Furman, Barry Rudman, Larry Gelner
  • Patent number: 5587109
    Abstract: A method of treating an aqueous system is described which comprises incorporating in the system a hydroxylamine derivative of the general formula: ##STR1## wherein each of R.sub.1, R.sub.2 and R.sub.3 which may be the same or different represents hydrogen, alkyl of 1 to 8 carbon atoms or aryl or a water soluble salt thereof or a precursor thereof, and a tannin in a weight ratio of at least 2:1. This is particularly useful for boiler water systems.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: December 24, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Brian Greaves, Stephen C. Poole, Chih M. Hwa, Joseph C. Fan
  • Patent number: 5565139
    Abstract: A vapor extraction apparatus includes a gel sorbent capable of absorbing vapor directly into the liquid state and capable of disgorging the absorbed liquid in a phase-transition. The apparatus includes a housing adapted for movement from a first position, where it is exposed to a vapor-containing gas stream and a first environmental condition, and capable of moving to a second position, where it is exposed to a second environmental condition. A gel sorbent is disposed on at least one surface of the housing. The gel sorbs vapor from the gas stream as liquid when the sorbent is in its first position. The sorbent disgorges the liquid during phase-transition collapse when it is in the second position. A method of extracting vapor from a process gas stream includes contacting a phase transition gel sorbent with vapor under conditions sufficient for the gel sorbent to undergo a phase transition and absorb vapor as liquid inside the gel sorbent.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: October 15, 1996
    Assignee: Gel Sciences, Inc.
    Inventors: David H. Walker, Harris Gold, George W. McKinney, III, John F. McCoy, III, Xiaohong Yu
  • Patent number: 5543388
    Abstract: Elemental iodine is used to improve the performance of conventional corrosional inhibitors in oil field acidizing operations. The iodine, because of its solubility, may be used in a formulation which includes a corrosion inhibitor and surfactants dissolved in a suitable organic solvent.
    Type: Grant
    Filed: August 5, 1993
    Date of Patent: August 6, 1996
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Dennis A. Williams, Lee A. McDougall, James R. Looney
  • Patent number: 5540861
    Abstract: This invention relates to a blend of different isomers of a compound represented by structure I ##STR1## wherein R is C.sub.9 -C.sub.20 alkyl; wherein Y is NO.sub.2 or SO.sub.3 R' or H; wherein R' is C.sub.1 -C.sub.20 alkyl; wherein X is NO.sub.2 or C.sub.1 -C.sub.20 alkyl; and wherein R" is H or C.sub.1 -C.sub.20 alkyl, m is 2 or 3, and n is 0, 1, 2, 3, with the provisos: (1) that Y may not be H and X may not be NO.sub.2 when n=0 and (2) that when R is C.sub.9 and n=0, X and Y may not both be NO.sub.2.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: July 30, 1996
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Anthony V. Grossi, Paul E. Stott, John M. DeMassa, Howard S. Friedman, Gerald J. Abruscato
  • Patent number: 5460751
    Abstract: Aqueous wood treating compositions, containing compounds which contain elements selected from copper, chromium and arsenic and oxyalkylene polymer additives, provide improved stability to CCA solutions containing additives. In addition, the compositions of the present invention have been found to retard hardening effects associated with wood treated with commercial CCA solutions.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: October 24, 1995
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Frank M. S. Ma, Marcel Ayotte
  • Patent number: 5415805
    Abstract: A composition and method for inhibiting corrosion of iron and iron-containing metals in contact with aqueous systems containing sulfide compounds. The composition comprises (A) an aqueous solution of an alcohol, an acid, a fatty imidazoline, and an ethoxylated fatty diamine, and (B) an aqueous solution of a molybdate compound or salt thereof.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: May 16, 1995
    Assignee: Betz Laboratories, Inc.
    Inventors: J. Michael Brown, James R. Ohlsen, Richard D. McBride
  • Patent number: 5389302
    Abstract: A chemiluminescent dye penetrant composition is provided for detecting cracks and other defects in the surface of an object, which comprises a carrier, preferably in the form of a nonionic surfactant, a small amount of a fluorescent dye soluble in the surfactant and a minor amount of hydrogen peroxide. The dye penetrant is applied to the surface of the object and excess dye penetrant is removed therefrom. An oxalate ester or oxalate amide is then applied to the treated surface and reacts with the dye penetrant in the cracks and defects to luminesce, and produces self illuminated penetrant indications at the location of the cracks and defects. Oxalate esters such as bis(2,4,6 trichlorophenyl) oxalate are preferred. The oxalate ester or oxalate amide can be mixed with inert conventional developer materials such as talc or fumed silica.
    Type: Grant
    Filed: October 4, 1993
    Date of Patent: February 14, 1995
    Assignee: Rockwell International Corporation
    Inventor: Leslie F. Warren, Jr.
  • Patent number: 5368774
    Abstract: The present invention provides compositions and methods which are effective to prevent corrosion of metal surfaces involved in refining solutions having relatively high partial pressures of carbon dioxide. The compositions of the present invention comprise mixtures of a pyridinium quaternary salt and an organic compound, such as thiourea, which contains at least one sulfur atom double bonded to a carbon atom. The compositions are added substantially continuously to the solution to be treated to result in a final concentration of at least about 30 ppm of pyridinium quaternary salt, preferably between about 56-70 ppm, and at least about 5 ppm double bonded sulfur containing compound, preferably between about 10-13 ppm.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: November 29, 1994
    Assignee: Baker Hughes Incorporated
    Inventors: Bradley G. Borgard, Jack B. Harrell, Jr., John Link
  • Patent number: 5354507
    Abstract: Compounds of general formula ##STR1## wherein: R is a linear or branched C.sub.1 -C.sub.20 alkyl radical, m is either 0 or 1; n has a value of from 1 to 10, are corrosion inhibitors, suitable for inhibiting the general corrosion and the stress brittlening caused by hydrogen sulfide (SSC), in an acidic environment, in the presence, or absence of carbon dioxide, of medium-and high-strength manganese steels and low-alloy steels, commonly used in petrochemical facilities and in bore drilling, transport and processing systems for natural gas or petroleum.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: October 11, 1994
    Assignee: Eniricerche S.p.A
    Inventors: Viviana De Malde, Luigi Rivola, Arnaldo Roggero, Alberto Gandini
  • Patent number: 5354924
    Abstract: Aromatic nitration reactions and, more specifically, a process for nitrating toluene to produce dinitrotoluene in the absence of any dipolar aprotic solvent.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: October 11, 1994
    Assignee: Olin Corporation
    Inventor: Robert W. Mason
  • Patent number: 5312952
    Abstract: This invention relates to a vinyl aromatic. Compounds of Structure (I): ##STR1## wherein R is C.sub.9 -C.sub.20 alkyl, Y is NO.sub.2, SO.sub.3 R' or H, R' is C.sub.1 -C.sub.20 alkyl, X is NO.sub.2 or C1-C.sub.20 alkyl, and R" is H or C.sub.1 -C.sub.20 alkyl, m is 2 or 3 and n is 0,1,2,3, with the proviso that when R is C.sub.9 and n=O, X and Y may not both be NO.sub.2.
    Type: Grant
    Filed: April 23, 1992
    Date of Patent: May 17, 1994
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Anthony V. Grossi, Paul E. Stott, John M. DeMassa, Howard S. Friedman, Gerald J. Abruscato
  • Patent number: 5250225
    Abstract: An ammonium salt of an alkenylsuccinic half-amide of formula (I) below ##STR1## in which R.sup.1 denotes H or a C.sub.6 -C.sub.18 -alkenyl radical, provided that the radicals R.sup.1 are not both H or both C.sub.6 -C.sub.18 -alkenyl,X denotes a group of the formula --NHR.sup.2 or --NR.sup.2 R.sup.3, in whichR.sup.2 and R.sup.3 denote C.sub.1 -C.sub.6 -alkyl, cycloalkyl or a heterocyclic ring attached to the nitrogen atom via an alkylene chain,andA denotes XH or a different primary, secondary, or tertiary amine, for example an alkanolamine or a polyamine,and the use thereof as a corrosion inhibitor in oil and/or gas production technology.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: October 5, 1993
    Assignee: BASF Aktiengesellschaft
    Inventors: Knut Oppenlaender, Brigitte Wegner, Wilhelmus Slotman
  • Patent number: 5223172
    Abstract: The present invention provides a hardner for epoxide resin masses based on dicyandiamide, wherein it containsa) dicyandiamide with a particle size of .gtoreq.90% .ltoreq.10 .mu.m. andb) 0.1 to 30% by weight of silicon dioxide and/or of an oxide of a metal of Group IIA or IIB of the Periodic Table with a large specific surface area.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: June 29, 1993
    Assignee: SKW Trostberg Aktiengesellschaft
    Inventors: Joachim V. Seyerl, Horst Michaud
  • Patent number: 5221498
    Abstract: Methods and compositions are provided for inhibiting the polymerization of a vinyl monomer during elevated processing thereof or during storage or shipment of the monomer containing product. The compositions comprise a combination of a dihydroxybenzene compound and an organic amine compound.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: June 22, 1993
    Assignee: Betz Laboratories, Inc.
    Inventors: Dwight K. Reid, Rosalie B. Hart
  • Patent number: 5176850
    Abstract: The present invention provides a composition in contact with a corrodable metal surface, comprising a functional fluid and, as corrosion inhibitor, a compound having the formula 1A ##STR1## as well as salts or esters thereof, wherein R.sup.3 is C.sub.9 -C.sub.20 linear or branched alkyl, phenyl or C.sub.7 -C.sub.20 alkylphenyl;R.sup.4 is C.sub.1 -C.sub.3 alkyl;X is CH.sub.2, O or S;Y is O or S; andZ is--(CH.sub.2).sub.n -in which n is 1,2,3,4 or 5, or Z is--CH.sub.2 --CH(CH.sub.3)-.
    Type: Grant
    Filed: February 15, 1991
    Date of Patent: January 5, 1993
    Assignee: Ciba-Geigy Corporation
    Inventor: Robert M. O'Neil
  • Patent number: 5176849
    Abstract: A composition and method of inhibiting corrosion in boiler-steam condensate systems comprising adding to the system N,N-dihydrocarbylhydroxylamine and N-hydrocarbylhydroxylamine in amounts effective to inhibit corrosion.
    Type: Grant
    Filed: April 15, 1992
    Date of Patent: January 5, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Chih M. Hwa, Dionisio G. Cuisia, Ronald L. Oleka
  • Patent number: 5174922
    Abstract: The invention provides a process of reducing the copper corrosiveness of dihydrocarbyl polysulfides by treating them with an alkali metal-containing or alkaline earth metal-containing substance capable of dissolving elemental sulfur (e.g., sodium hydroxide, sodium sulfide, etc.). The process is conducted in a liquid reaction medium composed of a mixture of water and at least one water-soluble alcohol. Experiments have shown that it is possible by use of this process to reduce the copper corrosiveness to a level below that exhibited by a product formed by treating the same initial dihydrocarbyl polysulfide in the same way but in a liquid medium composed solely of water.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: December 29, 1992
    Assignee: Ethyl Petroleum Additives, Inc.
    Inventors: Edmund F. Perozzi, Andrew G. Papay
  • Patent number: 5139701
    Abstract: A composition and method for controlling corrosion of steel in aqueous systems such as cooling and boiler systems. The combination of a nonionic surfactant and an anionic oxygen containing group such as one or more alkali metal salts of borate, molybdate and nitrate/nitrite provide improved corrosion inhibition of steel in aqueous systems. The magnetite layers formed in the presence of this combination exhibit decreased porosity and increased corrosion resistance to acidic solutions. This combination also inhibits entry of hydrogen into steel when exposed to acidic solutions thereby inhibiting hydrogen embrittlement. The preferred nonionic surfactant is phenol/polyethylene oxide nonionic surfactant and the preferred alkali metal salt is Na.sub.2 MoO.sub.4.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: August 18, 1992
    Assignee: Betz Laboratories, Inc.
    Inventor: Alexander C. McDonald
  • Patent number: 5130053
    Abstract: Concentrated solutions of hydrogen peroxide tend to decompose on storage, thereby losing their effectiveness, amongst other reasons by virtue of interaction with contaminating transition metals.Peroxygen compounds are stabilized by contact with a stabilizing amount of compound of general formula: ##STR1## in which X represents a methylene phosphonic acid group of formula --CH.sub.2 --(--PO.sub.3 H.sub.2) or salt thereof, R represents a tetra methylene diradical, optionally alkyl-substituted, that completes a cyclo-aliphatic ring and thereby establishes the two NX.sub.2 groups in a substantially fixed configuration and Y represents a hydrogen or lower alkyl group.Preferably, the solutions contain additionally one or more co-stabilizers, including stannate, phosphates, hydroxybenzoic acid, citric acid and nitrate.The stabilizer system can enable the solution to be diluted, even with municipal water.
    Type: Grant
    Filed: July 17, 1990
    Date of Patent: July 14, 1992
    Assignee: Interox Chemicals Limited
    Inventors: Neil D. Feasey, Gareth W. Morris