Organic Sulfur Compound Patents (Class 106/725)
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Patent number: 5667581Abstract: The present invention relates to a quick-hardening hydraulic bonding agent consisting of calcium silicate cement, particularly Portland cement, as well as additives and/or common admixtures which is characterized by a content of: 94.70 to 99.79% in weight of calcium silicate cement; 0.01 to 2.0% in weight of an organic and/or inorganic accelerator for the hydration of the calcium silicates; 0.1 to 3.0% in weight of an organic and/or inorganic retarding agent which inhibits the hydration of the calcium silicates, possibly having a liquefying effect; 0.01 to 0.30% in weight of an inhibiting agent with respect to the formation of the calcium aluminate sulfate hydrates.Type: GrantFiled: June 10, 1996Date of Patent: September 16, 1997Assignee: Heidelberger Zement AGInventors: Joachim Unsin, Hans Peter Braunbach, Manfred Tax
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Patent number: 5658380Abstract: An oil and gas well cementing composition and method are shown utilizing hydraulic cement, water a cement hydration retarder and an additive which is effective over a selected time period degrade the retarder. The additive is a controlled release oxidizer which releases nascent oxygen over time to gradually oxidize the cement hydration retarder, thereby providing a single cement slurry design for cementing pipes for oil and gas wells where wide temperature differentials exist between the two ends of the pipe.Type: GrantFiled: February 13, 1996Date of Patent: August 19, 1997Inventor: Robert Lee Dillenbeck, III
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Patent number: 5641352Abstract: An early strength-enhancing admixture and cement composition is disclosed. The admixtures incorporate strength-enhancing components selected from the group consisting ofa. a nitrogenous compound of the formula ##STR1## wherein R.sub.1 =R.sub.5 A;R.sub.2 =R.sub.5 A, R.sub.5 OH, --OR.sub.6, --R.sub.6, --H, or Z;R.sub.3 =R.sub.5 A, R.sub.5 OH, --OR.sub.6, --R.sub.6, --H, or Z;A=--COOH or --SO.sub.3 H (or salts thereof)Z= ##STR2## R.sub.4 =an alkylene linking group; R.sub.5 =C.sub.1 -C.sub.10 alkylene;R.sub.6 =C.sub.1 -C.sub.10 alkyl;and at least one of R.sub.2 or R.sub.3 is R.sub.5 A, andb. a nitrogenous compound of the formula ##STR3## wherein R.sub.7 =R.sub.5 OH;R.sub.8 =R.sub.5, --R.sub.5 OH;R.sub.9 =--H, R.sub.5 OH.Type: GrantFiled: October 25, 1995Date of Patent: June 24, 1997Assignee: W.R. Grace & Co.-Conn.Inventors: Ara A. Jeknavorian, Leslie Jardine
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Patent number: 5626663Abstract: A concrete composition capable of inhibiting shrinkage of structural concrete structures is disclosed. The concrete is formed with an admixture composed of at least one secondary/tertiary alkanediol.Type: GrantFiled: August 23, 1995Date of Patent: May 6, 1997Assignee: W. R. Grace & Co.-Conn.Inventors: Neal S. Berke, Michael P. Dallaire, Awdhoot V. Kerkar
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Patent number: 5613558Abstract: An oil and gas well cementing composition and method are shown utilizing hydraulic cement, water a cement hydration retarder and an additive which is effective over a selected time period to degrade the retarder. The additive is a controlled release oxidizer which releases nascent oxygen over time to gradually oxidize the cement hydration retarder, thereby providing a single cement slurry design for cementing pipes for oil and gas wells where wide temperature differentials exist between the two ends of the pipe.Type: GrantFiled: June 2, 1995Date of Patent: March 25, 1997Assignee: BJ Services CompanyInventor: Robert L. Dillenbeck, III
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Patent number: 5609681Abstract: A process for modifying the slump of a concrete or mortar by the addition at different times of a water-soluble poly(alkylene oxide) and a .beta.-naphthalene sulphonate-formaldehyde condensate, a plasticizer or superplasticizer which is selected from lignosulphonates, melamine sulphonate formaldehyde condensates, carboxylates and selected styrene-maleic anhydride copolymers. The poly(alkylene oxide) is preferably partially replaced by a (hydroxy)alkyl cellulose. The process is advantageously used in shotcreting.Type: GrantFiled: June 6, 1995Date of Patent: March 11, 1997Assignee: Sandoz Ltd.Inventors: Josef F. Drs, Tom Melbye, Odd M. Tjugum, Salvatore Valenti
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Patent number: 5605571Abstract: The invention relates to a setting- and hardening-accelerator for hydraulic binders containing at least a nitrate- or sulfite component, at least a thio-cyanate component, at least an alkanolamine component and at least a carboxylic acid component, as well as a method of setting- and hardening-acceleration of hydraulic binders or mixtures containing hydraulic binders.Type: GrantFiled: March 2, 1995Date of Patent: February 25, 1997Assignee: Sika Ag, vorm. Kaspar Winkler & Co.Inventors: Theodor A. Buerge, Urs Maeder, Franz Wombacher, Beat Marazzani
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Patent number: 5595596Abstract: The present invention relates to a cement composition containing water, hydraulic cement, inert products and a foaming agent obtained by reacting ethylene oxide with a substrate deriving from the production of synthetic alcohols by the oxosynthesis of normal-olefins, sulfating the ethoxylate compound thus obtained with sulfuric anhydride and neutralizing the sulfated acid product with a base of an alkaline, earth-alkaline metal or ammonia.The cement composition can optionally contain conventional additives such as stabilizers, set retarders or accelerators and disperding agents suitable for lowering the viscosity of the composition.This cement composition has improved processability characteristics and enables the production of lightweight concretes having greater mechanical resistance and durability and lower thermal conductivity particularly appropriate for the building industry.Type: GrantFiled: December 29, 1995Date of Patent: January 21, 1997Assignee: Eniricerche S.p.A.Inventors: Armando Marcotullio, Massimo Santori
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Patent number: 5584920Abstract: A process is described for preparing a water-soluble sulphonated dispersant from a petroleum hydrocracking residue comprising: contacting a petroleum hydrocracking residue boiling above 524.degree. C. with concentrated sulphuric acid, oleum or sulphur trioxide to form a sulphonated mixture containing water soluble and water insoluble products, and separating the water soluble sulphonated product from the mixture. The mixture of water soluble and water insoluble sulphonated products is neutralized with alkali and evaporated to dryness, after which the dried mixture is extracted with alcohol to leave a water soluble product. The product can be used as a water reducer or superplasticizer in concrete.Type: GrantFiled: April 20, 1995Date of Patent: December 17, 1996Assignee: Natural Resources CanadaInventors: Henry Sawatzky, Noel P. Mailvaganam, Ian F. Clelland, Jean Houde, Jr., Brian A. Farnand
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Patent number: 5571318Abstract: The present invention provides well cementing methods and compositions for use in cold environments which are particularly suitable for cementing conductor strings in deep water offshore wells. The cement compositions are basically comprised of a relatively coarse particulate hydraulic cement mixed with an ultra fine particulate hydraulic cement, sufficient water to form a pumpable slurry and a fluid loss control additive.Type: GrantFiled: August 31, 1995Date of Patent: November 5, 1996Assignee: Halliburton CompanyInventors: James E. Griffith, Patty L. Totten, Bobby L. King, Jiten Chatterji
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Patent number: 5569324Abstract: The present invention provides improved cementitious compositions which can include drilling fluid as a component thereof and methods of cementing wells utilizing such compositions. The compositions are basically comprised of a cementitious material, water, a hardenable resinous material and optionally, drilling fluid in an amount up to about 70% by volume of the cementitious material in the composition.Type: GrantFiled: June 2, 1995Date of Patent: October 29, 1996Assignee: Halliburton CompanyInventors: Patty L. Totten, Bobby J. King, Jiten Chatterji
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Patent number: 5551976Abstract: A solidified waste is formed from a difficult-to-compact hydraulic cement slurry for use in the disposal of hazardous waste. The slurry contains inorganic non-compactible hydraulic cement particles, a concrete superplasticizer compound, water, and filler particles containing radionuclide and/or toxic contaminants. The slurry is then transferred to a storage vessel, such as a subterranean formation, to cast a stronger, denser solidified waste than a comparable solidified waste containing no superplasticizer.Type: GrantFiled: December 21, 1994Date of Patent: September 3, 1996Assignee: Union Oil Company of CaliforniaInventor: William C. Allen
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Patent number: 5536311Abstract: The present invention provides set retarding additives, set retarded hydraulic cement compositions including such additives and methods of using the cement compositions for cementing zones in wells. The set retarding additives are copolymers or terpolymers containing monomer units formed from one of maleic acid, itaconic acid, fumaric acid, citraconic acid and mesaconic acid along with other monomer units.Type: GrantFiled: August 2, 1995Date of Patent: July 16, 1996Assignee: Halliburton CompanyInventor: Klein A. Rodrigues
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Patent number: 5531823Abstract: A Low Heat High Performance Concrete (LHHPC) composition having a very low cement content and high W/CM ratio offers high strengths, low heat of hydration, excellent volumetric stability, low chloride permeability and low pH. To reduce the cement content while maintaining high performance, silica fume and silica flour are used in large quantities. The LHHPC composition can be used for high mass concrete structures and other applications which require low heats of hydration yet offers compressive strength comparable to Standard High Performance Cement (SHPC).Type: GrantFiled: February 6, 1995Date of Patent: July 2, 1996Assignee: Atomic Energy Of Canada LimitedInventor: Dannys Breton
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Patent number: 5525155Abstract: A concrete pipe liner is formed from a difficult-to-compact hydraulic cement slurry applied to a pipe interior. The slurry contains inorganic non-compactible hydraulic cement particles, a concrete superplasticizer component, water, and optionally and preferably filler particles. The pipe is then spun to centrifugally cast a stronger, denser pipe liner than a comparable liner containing no superplasticizer.Type: GrantFiled: May 5, 1994Date of Patent: June 11, 1996Assignee: Union Oil Company of CaliforniaInventor: William C. Allen
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Patent number: 5507867Abstract: The present invention relates to a concrete-forming composition comprising:(a) a base component consisting of a combination of cement and silica,(b) water, as a carrier, and(c) from about 0.01% to about 25% by weight based on the weight of the composition of a wetting agent selected from the group consisting of piperazine-substituted organosulfonates, piperazinone-substituted organosulfonates, and combinations thereof, and optionally(d) a polycarboxylated alcohol alkoxylate.Type: GrantFiled: May 5, 1995Date of Patent: April 16, 1996Assignee: Olin CorporationInventors: Murray A. Ruggiero, Bruce A. Marien, Shoaib Arif, Robert P. Roth, Joseph T. Farrell, A. R. Vanover
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Patent number: 5490877Abstract: Disclosed is a low-viscosity cement composition, useful in the field of oil drilling, comprising cement, water and an additive obtained by salifying into the alkali-metal, alkali-earth metal, or ammonium salt, the sulphonated and oxidated products derived from the reaction between sulphur trioxide and cookery tar or sulphur trioxide and fuel oil from steam cracking; the cement composition is endowed with improved rheological characteristics such as a low-viscosity value without substantial changes in the pumping times, even at high temperatures and pressures.Type: GrantFiled: August 17, 1994Date of Patent: February 13, 1996Assignees: Eniricerche S.p.A., Snamprogetti S.p.A.Inventors: Aldo Prevedello, Goffredo Romano
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Patent number: 5478391Abstract: The cementitious material comprises an initial mixture of portland cement clinker and a modifier ranging in weight from approximately 0.5% to 5%, preferably 1%, of the weight of the clinker. The modifier is selected from a group comprising (a) a melamine formaldehyde-sodium bisulfite copolymer, and (b) sodium naphthalene sulfonate. The portland cement clinker and the modifier are intimately mixed and caused to react together in a solid state reaction by energetically grinding them together in a highly energetic ball-and-tube grinding mill to a high degree of fineness of at least approximately 5000 Blaine. Modified cementitious materials are produced by providing an additional constituent in the initial mixture comprising a hard, dense, substantially inert mineral material ranging up to 70% of the mixture by weight. The percentages of the portland cement clinker and the modifier are correspondingly reduced. The modified initial mixture is ground as before.Type: GrantFiled: March 26, 1993Date of Patent: December 26, 1995Assignee: Cement Technology CorporationInventors: Shahviran T. Babaev, Nikolay F. Bashlykov, Sergey A. Zubehin, Valery N. Serduk, Roman L. Serykh, Vicheslav R. Falikman, Boris E. Yudovetch, Vladimir P. Trambovetsky, Jaime Moreno, Claudio A. Eberhardt, Alfonso Cadaval
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Patent number: 5454867Abstract: A dry, agglomerated cement material, a method of preparing the dry, agglomerated cement material, a method of cementing, and an apparatus for agglomerating particulate materials. The dry, agglomerated cement material comprises a plurality of particles of a cement bonded together by a water-soluble binder material. The dry, agglomerated cement material is prepared by depositing the water-soluble binder material on the particles such that the binder material bonds the particles together. The inventive agglomerated cement material can be conveniently transported by both pneumatic and non-pneumatic means. The method of cementing comprises the step of mixing the agglomerated cement material with water to form a cement slurry.Type: GrantFiled: April 5, 1994Date of Patent: October 3, 1995Assignee: Halliburton CompanyInventors: Lance E. Brothers, J. Erlan Longendelpher, Donald W. Lindsey, Frank L. Sands, Kevin D. Edgley
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Patent number: 5447198Abstract: Improved hydraulic cement compositions and methods for cementing wells drilled through low temperature earth formations wherein the cement is subjected to freeze-thaw cycling are provided. The compositions are comprised of a hydraulic cement, gypsum cement, fly ash, an alkali metal halide, water, and an alcohol freezing point depressant.Type: GrantFiled: June 10, 1994Date of Patent: September 5, 1995Assignee: Halliburton CompanyInventors: Robert A. Kunzi, Edward F. Vinson, Patty L. Totten, Bobby G. Brake
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Patent number: 5427617Abstract: A method of reclaiming leftover ready-mix concrete comprising the steps of:(1) retarding the hydration of the unused portion of concrete returned from a job site; and(2) after the desired retarded period adding a hydration acceleration agent to restore the concrete to a settable state.Type: GrantFiled: August 23, 1993Date of Patent: June 27, 1995Assignee: Sandoz Ltd.Inventors: Gregory S. Bobrowski, Gregory C. J. Guecia, David A. Lupyan, Frederick D. Kinney
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Patent number: 5355955Abstract: The present invention provides set retarding additives, set retarded hydraulic cement compositions including such additives and methods of using the cement compositions for cementing zones in wells. The set retarding additives are graft copolymers or terpolymers comprised of the condensation polymer product of a ketone, aldehyde and a compound which introduces acid groups into the polymer having grafted thereto a monomer selected from the group consisting of acrylic acid, vinyl phosphonic acid, methacrylic acid, maleic acid and itaconic acid or one of the foregoing monomers and a second monomer of 2-acrylamido-2-methylpropane sulfonic acid.Type: GrantFiled: July 2, 1993Date of Patent: October 18, 1994Assignee: Halliburton CompanyInventors: Klein A. Rodrigues, Jiten Chatterji
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Patent number: 5348582Abstract: The invention relates to mineral building materials which contain binders, optionally aggregates and at least one additive, characterized in that the additives used are compounds which are condensation products of substituted or unsubstituted diphenyl sulphones, formaldehyde and compounds from the group consisting of mononuclear or polynuclear, substituted or unsubstituted aromatic compounds, acid amides, urea, urea derivatives, substituted or unsubstituted aromatic ethers and imines.Type: GrantFiled: May 20, 1993Date of Patent: September 20, 1994Assignee: Bayer AGInventors: Joachim Herzig, Kurt Bredtmann, Birger Knickel, Cornelia Dorzbach-Lange
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Patent number: 5348584Abstract: This invention relates to a dry, fine particle size hydraulic cement composition, which is directly dispersable in both water and a hydrocarbon liquid and to the use of said composition in oil well cementing operations and methods of terminating water flow in subterranean hydrocarbon producing formations.Type: GrantFiled: November 23, 1993Date of Patent: September 20, 1994Assignee: Halliburton CompanyInventors: Lance E. Brothers, Jeffrey A. Dahl
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Patent number: 5339903Abstract: A method of cementing a wellbore which penetrates a subsurface gas-containing formation is provided whereby gas migration is reduced. The method features the use of an additive consisting of a tannin backbone having grafted thereto at least two different vinylamide derivatives. The additive causes the cement slurry employed in the method to exhibit a Zero Gel Time of greater than about one hour, a Transition Time of less than about one hour and controls fluid loss from the slurry.Type: GrantFiled: November 12, 1993Date of Patent: August 23, 1994Assignee: Halliburton CompanyInventors: Larry S. Eoff, Bill W. Loughridge
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Patent number: 5340397Abstract: Set retarded ultra fine cement compositions which remain pumpable for a predictable period of time at temperatures up to about 240.degree. F. are provided. The compositions are basically comprised of an ultra fine hydraulic cement, sufficient water to form a pumpable slurry and a set retarder comprised of a methylenephosphonic acid derivative.Type: GrantFiled: August 30, 1993Date of Patent: August 23, 1994Assignee: Halliburton CompanyInventor: Lance E. Brothers
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Patent number: 5322556Abstract: A process for preparing a sulfonated dispersant from a petroleum asphalt fraction, comprising:establishing contact between the asphalt fraction dissolved in an inert solvent and liquid or gaseous sulfur trioxide at a temperature equal to or less than 60.degree. C., to obtain a sulfonated asphalt fraction;salifying the sulfonated asphalt fraction thus obtained by contact with an aqueous solution of a hydroxide of an alkaline metal, alkaline earth metal or ammonium and recovering the sulfonated salt from the reaction mixture.This process provides water-soluble sulfonated salts of petroleum asphalt fractions, which can be used as fluidifying and stabilizing agents for aqueous dispersions of solids, such as aqueous dispersions of coal or cement.Type: GrantFiled: March 8, 1993Date of Patent: June 21, 1994Assignees: Eniricerche S.p.A., Snamprogetti S.p.A.Inventors: Aldo Prevedello, Edoardo Platone, Elio Donati
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Patent number: 5292367Abstract: A dispersant for spacer fluids, cement slurries, completion fluids and mixtures of drilling fluids and cement slurries used for drilling and cementing subterranean wells.Type: GrantFiled: November 24, 1992Date of Patent: March 8, 1994Assignee: Atlantic Richfield CompanyInventors: James B. Bloys, William N. Wilson, Edward Malachosky, Robert B. Carpenter, Roger D. Bradshaw
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Patent number: 5275654Abstract: Cement-to-casing sealing in a wellbore is improved through addition of surfactant to the cement.Type: GrantFiled: April 13, 1992Date of Patent: January 4, 1994Assignee: Shell Oil CorporationInventor: Kenneth M. Cowan
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Patent number: 5273580Abstract: Improved set retarded cement compositions and methods of using such compositions which are substantially non-thinning at high temperatures and which can include fresh or salt water are provided. The compositions are comprised of hydraulic cement, sufficient water to form a pumpable slurry, a set retarder and a delayed viscosifying agent which yields viscosity at high temperatures comprised of a treated depolymerized galactomannan gum.Type: GrantFiled: November 9, 1992Date of Patent: December 28, 1993Assignee: Halluburton CompanyInventors: Patty L. Totten, Donald W. Lindsey, Bobby J. King
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Patent number: 5256199Abstract: Cement and aggregates are mixed with each other by the use of a dispersant to the effect of water reduction and prevention of slump loss, the dispersant comprising (1) (I), (IIa), and an amine reaction terminator of (IIb), (IIc), (IVg) and/or (IVh); (2) (I), (IIb) and/or (IIc) and (IIIe) and/or (IIIf); or (3) (I), (IIa) and (IIIe) and/or (IIIf), in which formulae, R is hydrogen or an alkyl having 1 to 6 carbon atoms; X is an alkali metal; X.sub.1 is hydrogen, an alkyl having 1 to 6 carbon atoms, carboxylic acid group, an alkali metal salt carboxylate, sulfonic acid group, an alkali metal salt sulfonate, hydroxy or methoxy; Y.sub.1 is carboxylic acid or an alkali metal salt carboxylate, sulfonic acid or an alkali metal salt sulfonate; Y is hydrogen or an alkali metal; Z is hydrogen, an alkyl having 1 to 6 carbon atoms or --CH.sub.2 SO.sub.3 M; and M is hydrogen or an alkali metal.Type: GrantFiled: July 30, 1991Date of Patent: October 26, 1993Assignee: Kao CorporationInventors: Fuzio Yamato, Shuichi Fujita, Tatsuo Izumi, Yoshiaki Tanisho, Kazushige Kitagawa
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Patent number: 5245001Abstract: The present invention relates to aminoarylsulfonic acid-phenol-formaldehyde condensate useful for incorporation into cementing compositions, for example, mortar, cement paste and the like, for improving slumping characteristics.Type: GrantFiled: October 9, 1991Date of Patent: September 14, 1993Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Takahiro Furuhashi, Kazushige Kawada, Susumu Tahara, Toru Takeuchi, Yuji Takahashi, Toshikazu Adachi, Tsutomu Teraji
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Patent number: 5244498Abstract: The present invention relates to a method of retarding the set of residual concrete in a concrete holding vessel comprising uniformly directing an aqueous solution containing an effective amount of a set retarding agent against the residual concrete on the inner surface of said concrete holding vessel with sufficient pressure to retard concrete set with less than about 3 gallons of aqueous solution per every 10 lbs. of residual concrete. The present invention also relates to an apparatus which utilizes a minimal amount of wash water.Type: GrantFiled: April 9, 1991Date of Patent: September 14, 1993Assignee: W. R. Grace & Co. of Canada Ltd.Inventor: Lloyd E. Steinke
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Patent number: 5234754Abstract: Shaped articles with a coherent matrix which comprises homogeneously arranged inorganic solid particles (A) of a size of from about 50 .ANG. to about 0.5 micron, such as silica dust particles, and densely packed solid particles (B) having a size of the order of 0.5-100 micron and being at least one order of magnitude larger than the respective particles A, such as Portland cement particles, the particles A being homogeneously distributed, especially densely packed, in the void volume between the particles B, are made from an easily flowable composite material containing a very low amount of liquid and an extremely high amount of a dispersing agent, such as a concrete superplasticiser.Type: GrantFiled: September 9, 1988Date of Patent: August 10, 1993Inventor: Hans H. Bache
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Patent number: 5233012Abstract: Novel condensates comprising bisphenols and aromatic aminosulfonic acids, in particular, novel 4-aminobenzenesulfonic acid-2,2-bis (hydroxyphenyl)propaneformaldehyde condensates, and methods for their production are disclosed. The novel condensates are useful as a dispersant for disperse dyes, an additive for carbonaceous fine powder-water slurries and as a water reducing agent for cement.Type: GrantFiled: June 8, 1992Date of Patent: August 3, 1993Assignee: Sanyo-Kokusaku Pulp Co., Ltd.Inventors: Masanobu Kawamura, Shinji Hamada, Takashi Date, Toshihiro Sugiwaki, Nobuhiro Hanada
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Patent number: 5221344Abstract: A concrete composition contains hydraulic cement, inerts, water and superfluidifying additive obtained by salifying, in the form of an alkaline metal, alkaline earth metal or ammonium salt, the sulphonated and oxidised products resulting from the reaction between sulphur trioxide and fuel oil deriving from steam cracking. This concrete composition has improved workability characteristics and enables concretes to be obtained generally possessing greater strength and durability.Type: GrantFiled: May 1, 1992Date of Patent: June 22, 1993Assignees: Eniricerche S.p.A., Snamprogetti S.p.A.Inventors: Aldo Prevedello, Edoardo Platone, Dario Ercolani, Elio Donati
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Patent number: 5203919Abstract: Method and compositions for the stabilization (prevention of hardening) of concrete residues in Ready-Mix truck drums.Type: GrantFiled: March 27, 1992Date of Patent: April 20, 1993Assignee: Sandoz Ltd.Inventors: Gregory S. Bobrowski, Robert J. Ryan
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Patent number: 5176753Abstract: A chloride-free admixture for use as a cold weather (e.g., 13.degree. F. to 40.degree. F.) concrete set accelerator. The admixtures comprise;1) at least one soluble inorganic salt having freezing point depressant properties,2) at least one water reducing dispersant, e.g., superplasticizer,3) at least one inorganic early set and strength accelerator, and optionally,4) at least one inorganic set accelerator.Type: GrantFiled: November 12, 1991Date of Patent: January 5, 1993Inventor: John W. Brook
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Patent number: 5133806Abstract: There is disclosed a softy mud solidifying agent which comprises cement, and at least two members selected from the group consisting of pozzolanic substances, inorganic compounds and organic compounds. The solidifying agent is capable of solidifying dredged earth, sand, softy mud, etc. in such a manner that their mixture can be re-cast into water to form submerged banks, artificial fish-gathering places, etc., without causing water pollution.Type: GrantFiled: January 6, 1992Date of Patent: July 28, 1992Assignees: Fujita Corporation, Onoda Chemico Co., Ltd.Inventors: Hiroyuki Sakamoto, Masao Sagara, Masao Shimoda, Kitsugi Kyoichi
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Patent number: 5127955Abstract: Chloride-free set accelerated cement compositions and methods of using the compositions for cementing conduits in well bores are provided. The compositions are comprised of hydraulic cement, sufficient water to form a pumpable slurry and a chloride-free set accelerator selected from trihydroxybenzoic acid, disodium dihydroxybenzenedisulfonate or derivatives of such compounds.Type: GrantFiled: October 17, 1990Date of Patent: July 7, 1992Assignee: Halliburton CompanyInventors: Slaton E. Fry, Patty L. Totten, Jerry D. Childs, Donald W. Lindsey
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Patent number: 5125976Abstract: A method for milling Portland clinker for the production of gypsumless Portland cements is provided. The method comprises milling the Portland clinker in the presence of 0.01 to 0.05 weight % of a synthetic, organic, surface-active substance with wetting properties that is stable in an alkaline medium of pH 9-12, with the exception of the triethanolamide of dodecylbenzylsulphonic acid, to produce gypsumless Portland cements with specific surfaces of 350-750 m.sup.2 /kg.Type: GrantFiled: March 30, 1990Date of Patent: June 30, 1992Assignee: Ceskoslovenska Akademie VedInventors: Frantisek Skvara, Jaroslav Hrazdira, Tomas Vsetecka
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Patent number: 5120367Abstract: A device comprising a solid or powdered concrete admixture contained in a water-soluble container such that when the container and its contents are introduced into a wet mixer and agitated for a period of time, the water-soluble container is dissolved and the contents are released into the wet mixer. A separate water-insoluble receptacle is used to house and store the water-soluble container and its contents. In addition, there is disclosed a method for modifying the properties of a concrete by introducing a pre-weighed amount of solid admixture contained in a water-soluble container into a wet mixer and thereafter agitating the resulting mix.Type: GrantFiled: October 4, 1990Date of Patent: June 9, 1992Assignee: Fritz Chemical CompanyInventors: Dwight Smith, Jack L. Edwards
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Patent number: 5112405Abstract: Compositions for lightweight, waterproof, cementitious materials comprise portland cement, aggregates, two admixtures, and water. A first admixture comprises a major portion of calcium chloride and minor portions of sodium silicate and a wetting agent. A second admixture comprises an emulsion of ammonium stearate. Methods for producing cementitious materials include a process for manufacturing strong, lightweight, waterproof building products such as roofing tile, imitation bricks, and the like.Type: GrantFiled: November 16, 1990Date of Patent: May 12, 1992Inventor: Michael A. Sanchez
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Patent number: 5099922Abstract: This invention involves cementing compositions for the oil industry and their use in cementing wells. More specifically, this invention involves the control of the gas migration or gas channeling phenomenon that occurs during the setting of a cement slurry. A cementing composition, capable of inhibiting gas channeling, comprised of gaseous fluid, hydraulic cement, and a gas channeling inhibiting additive comprised of a copolymer 2-acrylamido-2 methylpropane-3-sulphonic acid, N-vinylacylamide and acrylamide, is provided.Type: GrantFiled: March 26, 1991Date of Patent: March 31, 1992Assignee: The Western Company of North AmericaInventor: Kalyan K. Ganguli
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Patent number: 5092934Abstract: The present invention relates to aminoarylsulfonic acid-phenol-formaldehyde condensate and concrete admixture comprising the same for incorporation in cementing compositions, for example, mortar, cement paste and the like, for improving slumping characteristics.Type: GrantFiled: March 26, 1990Date of Patent: March 3, 1992Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Takahiro Furuhashi, Kazushige Kawada, Susumu Tahara, Toru Takeuchi, Yuji Takahashi, Toshikazu Adachi, Tsutomu Teraji
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Patent number: 5087648Abstract: Fluidizing property is provided to a hyraulic cement composition by adding a cement dispersion agent to the composition by 0.01-2 weight % with respect to its solid cement component. The cement dispersion agent contains a water-soluble vinyl copolymer which is obtainable by copolymerization of at least first monomer shown by Formula A given below, second monomer shown by Formula B given below and third monomer shown by Formula C given below at copolymerization rate of 10-50/3-25/80-40 by weight: ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are H or CH.sub.3, R.sup.5 is alkyl group with 1-3 carbon atoms, M.sup.1 and M.sup.2 are alkali metal, alkali earth metal, ammonium or organic amine, and n is an integer in the range 5-25. Such a dispersion agent is produced by aqueous solution polymerization of monomers of these kinds at a weight ratio within the range given above in the presence of a radical polymerization initiating agent.Type: GrantFiled: May 24, 1990Date of Patent: February 11, 1992Assignee: Takemoto Yushi Kabushiki KaishaInventors: Mitsuo Kinoshita, Toshihide Shimono, Shozo Yamaguchi, Tsuneo Yamamoto
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Patent number: 5076852Abstract: A cement method and composition for cementing a well penetrating subterranean formations and aqueous based drilling fluid containing at least one cement retarder characterized by a major proportion of the drilling fluid from the well as it was drilled; water; a lesser proportion of dry cementitious material; a minor amount of a dispersant that does not effect satisfactory set cement within an acceptable time interval; and an accelerator selected from the class consisting of acetic acid; the first 4 carbon esters thereof; acetamide; monoethanolamine; and diethanolamine. The first 4 carbon esters are the methyl; ethyl; propyl, both normal and isopropyl; and butyl ester, normal, isobutyl and tertiary butyl.Type: GrantFiled: April 29, 1991Date of Patent: December 31, 1991Assignee: Atlantic Richfield CompanyInventors: James B. Bloys, William N. Wilson, Roger D. Bradshaw
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Patent number: 5069721Abstract: Disclosed is a mortar.concrete composition comprising a polymer emulsion, a portland cement material and an aggregate, which is characterized in that the polymer emulsion is one prepared by neutralizing a seed polymer with an acid or a salt or by quaternizing it with a quaternizing agent, the surfaces of the emulsion grains being thereby highly densely cationated, where the seed polymer is formed by adding a monomer as represented by the following formula (I) or a mixture of the monomer (I) and copolymerizable ethylenic unsaturated monomer(s) to a seed latex of a carboxyl-modified synthetic rubber latex or synthetic resin emulsion and polymerizing them: ##STR1## The polymer of the invention may noticeably reinforce the strength of the shaped product even when the amount of the polymer added is small.Type: GrantFiled: March 22, 1990Date of Patent: December 3, 1991Assignee: Mitsui-Cyanamid, Ltd.Inventors: Akira Tamura, Naotaka Watanabe, Hitoshi Fujiyoshi, Masako Shirota
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Patent number: 5016711Abstract: Cement-to-casing sealing in a wellbore is improved through addition of surfactant to the cement.Type: GrantFiled: February 24, 1989Date of Patent: May 21, 1991Assignee: Shell Oil CompanyInventor: Kenneth M. Cowan
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Patent number: RE35194Abstract: The present invention is a specific combination of components having unique properties both in composition and benefits. Such a combination has been found in alkali or alkaline earth metal nitrates, alkanolamines and alkali or alkaline earth metal thiocyanates. In such combinations it has also been found that alkaline and alkali earth thiosulfates and chlorides below the concentration level where corrosion is promoted may advantageously be substituted for all or part of the thiocyanates and that diethanolamine, N,N-di(hydroxyethyl)glycine (bicine) and N,N-di(hydroxyethyl)-.beta.-aminopropionic acid (DAPA) and certain alkanolamines and alkanolamino acids and derivatives may advantageously be substituted for all or part of the triethanolamine.Type: GrantFiled: January 12, 1994Date of Patent: April 2, 1996Assignee: Sandoz Ltd.Inventor: Arthur H. Gerber