Patents Examined by Deanna Baxam
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Patent number: 5980783Abstract: Stabilizer mixture comprising, for example, a compound of the formula ##STR1## and, for example, a compound of the formula ##STR2##Type: GrantFiled: April 5, 1996Date of Patent: November 9, 1999Assignee: Ciba Specialty Chemicals CorporationInventor: Fran.cedilla.ois Gugumus
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Patent number: 5898004Abstract: Novel sensor devices composed of a crystalline colloidal array (CCA) polymerized in a hydrogel are disclosed. The hydrogels are characterized as being capable of shrinking and swelling in response to specific stimuli applied thereto. As the hydrogels shrink or swell, the lattice structure of the CCA embedded therein changes, thereby changing the wavelength of light diffracted by the CCA. Thus by monitoring the change in diffracted wavelength, the concentration of a stimulus is determined. The gels can be modified to sense numerous different stimuli. The sensor devices are specific in that they are modified to react with only one species or family of species. These sensors have various applications in areas including, for example, environmental and chemical systems, chemomechanical systems, sensor devices and medical diagnostic tools. Various methods for making and using these devices are also disclosed.Type: GrantFiled: November 6, 1996Date of Patent: April 27, 1999Assignee: University of Pittsburgh of the Commonwealth System of Higher EducationInventors: Sanford A. Asher, John H. Holtz
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Patent number: 5891362Abstract: A sol having dispersed in a liquid medium particles of a hydrated zinc stannate having a primary particle diameter of from 2 to 200 nm and represented by the formula xZnO.ySnO.sub.2.zH.sub.2 O wherein the molar ratio of x:y:z is 1:0.83 to 1.43:1.00 to 5.00.Type: GrantFiled: June 6, 1996Date of Patent: April 6, 1999Assignee: Nissan Chemical Industries, Ltd.Inventors: Yoshitane Watanabe, Keitaro Suzuki, Yoshinari Koyama, Motoko Iijima
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Patent number: 5874017Abstract: A defoaming agent composition containing: (a) from about 10 to about 25% by weight of a microcrystalline wax having a melting point of from about 75 to about 95.degree. C.; and (b) from about 1 to about 5% by weight of an emulsifier selected from the group consisting of alkoxylated sorbitan mono/di/trioleate, alkoxylated sorbitol hexaoleate, sorbitan mono/di/trioleate, polyethylene glycol dioleate, polyethylene glycol distearate, block copolymers of ethylene oxide and propylene oxide, and mixtures thereof; and (c) remainder, water, all weights being based on the weight of the composition.Type: GrantFiled: August 12, 1996Date of Patent: February 23, 1999Assignee: Geo Specialty Chemicals, Inc.Inventors: John J. Palmer, Mary L. Lightsey, Lynn A. Lavender, Zhentaro He
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Patent number: 5871691Abstract: A method and compounds for inhibiting and controlling corrosion is disclosed. The method is particularly effective at inhibiting or preventing corrosion of ferrous-based metals in contact with aqueous systems such as cooling water systems. The method comprises introducing into the aqueous system a compound of the general formula: ##STR1## wherein R is hydrogen, alkyl, aryl, substituted alkyl or substituted aryl; R' and R" are each independently hydrogen, C.sub.1-4 alkyl or C.sub.1-4 substituted alkyl; Z is O, S, NH, or NR, where R is as described above; n is a positive integer greater than 1; f is a positive integer; and M is hydrogen, a water soluble cation (e.g., NH.sub.4.sup.+, alkali metal), or a C.sub.1 -C.sub.3 alkyl group.Type: GrantFiled: September 27, 1995Date of Patent: February 16, 1999Assignee: BetzDearborn Inc.Inventors: William S. Carey, William C. Ehrhardt, Andrew Solov
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Patent number: 5871667Abstract: Aqueous ammoniate solutions made during the manufacture of N-hydrocarbyl thiophosphoric triamides, consisting essentially of aqueous solutions of ammonium chloride and ammonia containing a water-soluble impurity normally tending to engender corrosion of ferrous metal are rendered corrosion-resistant by dissolving therein a small corrosion-inhibiting amount (e.g., up to about 5000 ppm (wt/wt) of a water-soluble salt or oxide of zinc, aluminum, arsenic, antimony or bismuth.Type: GrantFiled: January 21, 1997Date of Patent: February 16, 1999Assignee: Albemarle CorporationInventors: Chi Hung Cheng, Gerald M. Sulzer
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Patent number: 5867549Abstract: Methods are provided to at least slow the dissolution of silica in an aqueous environment. In the subject methods, the silica surface is contacted with a multivalent metal cation capable of complexing with oxygen atoms present on the silica surface, where contacting is preferably accomplished by introducing a source of the multivalent metal cation into the aqueous environment. The subject methods find particular use in the inhibition of the dissolution of silica comprising neutron poisoning materials employed in the storage of spent nuclear fuel.Type: GrantFiled: September 18, 1996Date of Patent: February 2, 1999Assignee: Electric Power Research Institute, Inc.Inventors: Kenneth O. Lindquist, Thomas C. Haley
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Patent number: 5863415Abstract: Corrosion of iron-containing metal surfaces in a hydrocarbon fluid having a temperature of from about 175.degree. C. to about 400.degree. C. and containing a corrosive amount of naphthenic acid is inhibited by adding to the fluid or to a feed therefor, in a total additive amount sufficient to effect corrosion inhibition in said fluid, one or more thiophosphorus compound, a salt thereof, an alkyl or aryl ester thereof, an isomer thereof, or some combination of the foregoing, thereby to effect inhibition of naphthenic acid induced corrosion in the fluid.Type: GrantFiled: August 28, 1997Date of Patent: January 26, 1999Assignee: Baker Hughes IncorporatedInventor: Michael J. Zetlmeisl
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Patent number: 5853620Abstract: The subject matter of this invention is directed to compositions and compounds to minimize hydrogen charging and hydrogen induced cracking of steels comprising, in one embodiment, a propylene diamine compound and in another a carrier and propylene diamines. Preferably, the composition of that embodiment is comprised of a hydrocarbon carrier and 1,3 propylene diamines. Alternatively, compositions of the present invention may be comprised of a carrier and octadecyl trimethyl ammonium bromide. In addition, where the environment dictates, the composition of the present invention may be comprised of a carrier, at least one 1,3 propylene diamine and octadecyl trimethyl ammonium bromide.Type: GrantFiled: February 28, 1995Date of Patent: December 29, 1998Assignee: InterCorr-CLI International, Inc.Inventors: Russell D. Kane, Michael S. Cayard
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Patent number: 5843339Abstract: Phosphites represented by the general formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.4 and R.sup.5 independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, an alkylcycloalkyl group having 6 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms or a phenyl group; R.sup.3 and R.sup.6 independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms; X.sub.1 is a dihydric alcohol residue, wherein HO--X.sub.1 --OH defines the corresponding dihydric alcohol from which residue X.sub.1, is obtained; and X.sub.2 is a direct bond or an alkylene group having 1 to 8 carbon atoms; and the phosphites are useful as stabilizers for organic materials.Type: GrantFiled: October 1, 1996Date of Patent: December 1, 1998Assignee: Sumitomo Chemical Company, LimitedInventors: Kanako Fukuda, Naoki Inui
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Patent number: 5843373Abstract: The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a thiodialkanol. The thiodialkanol is useful for inhibiting the corrosion of metals in both the acid gas rich and lean portions of the acid gas removal unit.Type: GrantFiled: August 22, 1997Date of Patent: December 1, 1998Assignee: BetzDearborn Inc.Inventors: Ljiljana V. Minevski, Sydia B. Anderson, Michael A. Cady
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Patent number: 5843299Abstract: The corrosion of metals in contact with an aqueous alkanolamine solution in an acid gas removal unit is inhibited by adding a corrosion inhibiting amount of an alkanemonothiol or alkanedithiol compound to the aqueous alkanolamine solution. The alkanemonothiol and alkanedithiol compounds are useful for inhibiting the corrosion of metals in both the acid gas rich and lean portions of the acid gas removal unit.Type: GrantFiled: August 22, 1997Date of Patent: December 1, 1998Assignee: BetzDearborn Inc.Inventors: Ljiljana V. Minevski, Ann L. Lambousy
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Patent number: 5843338Abstract: A composition for water-repellent treatment of zinc and zinc alloys which comprises a non-ionic polymeric compound having both hydrophilic and hydrophobic groups in the molecule, a polyacrylic acid salt and a balance of water. The composition can be used in a method for water-repellent treatment of zinc and zinc alloys which comprises the steps of immersing zinc or zinc alloys which has been subjected to a conversion treatment, then washing it with water and drying the same. The use of the water-soluble composition for water-repellent treatments permits considerable reduction of the contact area between the repellent-treated metal material and moisture which becomes a cause of corrosion under the corrosive environment in which water and oxygen coexist and this accordingly results in the improvement in the corrosion-resistance of the metal material.Type: GrantFiled: October 22, 1996Date of Patent: December 1, 1998Assignee: Dipsol Chemicals Co., Ltd.Inventors: Manabu Inoue, Tadahiro Ohnuma, Tomitaka Yamamoto, Go Sato
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Patent number: 5840213Abstract: A method of improving the storage life of goods by storing the goods in an environment comprising heptafluoropropane at pressures of between about 0.1 atmospheres and about 2.0 atmospheres. Foods, pharmaceuticals, and other goods adversely affected by oxygen and/or moisture are effectively stored by the claimed method. The method is particularly effective for goods stored in plastic containers, and for goods stored in containers stoppered by rubber stoppers.Type: GrantFiled: March 14, 1997Date of Patent: November 24, 1998Assignee: Great Lakes Chemical CorporationInventors: Charles J. Mazac, John S. Rubacha
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Patent number: 5840658Abstract: A process for fixing of a scale inhibitor in a subterranean formation, which comprises:a) injecting into the formation a solution comprising a polymeric scale inhibitor, a metal cation, a precursor and a weak organic acid, wherein the polymeric scale inhibitor and metal cation are slightly soluble in water in the formation and wherein the precursor reacts in the formation to produce an alkaline compound which causes the polymeric scale inhibitor to precipitate in the formation; andb) allowing the polymeric scale inhibitor to precipitate in the formation in an amount which is effective in inhibiting scale formation for a given period of time.Type: GrantFiled: December 27, 1996Date of Patent: November 24, 1998Assignee: Petroleo Brasilerio S.A.- PetrobrasInventors: Francisca Ferreira Do Rosario, Carlos Nagib Khalil, Maria Carmen Moreira Bezerra, Sandra Botelho Rondinini
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Patent number: 5840207Abstract: The addition of an effective amount of a liquid modified diethanolamide which is suitably a reaction product of cocoamide and phthalic anhydride to a calcium chloride composition, which can be a brine solution or a solid, reduces the amount of corrosion of metals by the resulting composition. The calcium chloride/diethanolamide composition can be used as a deicer composition.Type: GrantFiled: August 22, 1996Date of Patent: November 24, 1998Assignee: General Chemical CorporationInventors: John Scott Beazley, William Edward Sadar, Douglas Robert Maynes, Mark G. Jantzen
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Patent number: 5837159Abstract: A chemical composition is disclosed herein for performing a complex neutralization and fixation of embalming fluids, providing a method for the rapid neutralization of formaldehyde vapors, the control of incidental releases, detoxification and disposal of unused or spent embalming fluids, and of any unused or spent aqueous or non-aqueous formaldehyde solutions. The composition includes alkanolamines for rapid reaction with formaldehyde vapors, aqueous and non-aqueous solutions of formaldehydes, for absorbing hydrogen sulfide and carbon dioxide from the air, and cyclodextrins for inclusion complexation of all the components of spent and/or unused embalming fluids.Type: GrantFiled: September 23, 1996Date of Patent: November 17, 1998Inventors: Gabriel J. Farkas, Michel Iskarous
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Patent number: 5833882Abstract: A detecting agent for detecting at least one member selected from the group consisting of halogen gases and acidic gases which is contained in a gas, wherein the detecting agent comprises a discoloring component which comprises a hydroxide of a transition metal and Congo Red. Halogen gases and acidic gases which are contained in hydrogen, nitrogen, argon, or helium can be detected under a dry condition with a high sensitivity in accordance with the present invention.Type: GrantFiled: June 2, 1997Date of Patent: November 10, 1998Assignee: Japan Pionics Co., Ltd.Inventors: Takashi Shimada, Youji Nawa
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Patent number: 5833874Abstract: Fire-extinguishing compositions of low ozone depletion potential comprise dry particles of fire-extinguishing agents dispersed in a gel of liquified volatile perfluorocarbons, chlorofluorocarbons or hydrofluorocarbons. The dry particles are compatibilized with the carrier gel by the presence of a surfactant system composed of a non-ionic surfactant, a film forming fluorocarbon surfactant and a phosphorus containing antiflocculent.Type: GrantFiled: December 5, 1995Date of Patent: November 10, 1998Assignee: Powsus Inc.Inventors: Harry E. Stewart, Donald B. MacElwee
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Patent number: 5833881Abstract: A stable aqueous solution comprising a water soluble salt of a magnesium compound, a surfactant and a calcium salt inhibitor is used to reduce deposits in kilns or furnaces used to make iron ore agglomerates, known as pellets, during iron ore calcination.Type: GrantFiled: April 22, 1997Date of Patent: November 10, 1998Assignee: BetzDearborn Inc.Inventor: Donald C. Roe