Patents Examined by Alicia M. Toscano
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Patent number: 7582590Abstract: Methods of treating a portion of a subterranean formation comprising: providing an aqueous treatment fluid comprising an aqueous fluid and a friction reducing copolymer that comprises acrylamide and 2-(2-ethoxyethoxy)-ethyl acrylate and introducing the aqueous treatment fluid into the portion of the subterranean formation. Methods of fracturing a subterranean formation comprising: providing an aqueous treatment fluid comprising an aqueous fluid and a friction reducing copolymer that comprises acrylamide and 2-(2-ethoxyethoxy)-ethyl acrylate and introducing the aqueous treatment fluid into the subterranean formation at or above a pressure sufficient to create one or more fractures in the subterranean formation. Aqueous treatment fluids comprising: an aqueous fluid and a friction reducing copolymer that comprises acrylamide and an acrylic acid ester.Type: GrantFiled: March 13, 2008Date of Patent: September 1, 2009Assignee: Halliburton Energy Services, Inc.Inventors: Robert E. Hanes, Jr., David E. McMechan, Karen L. King, Jiten Chatterji
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Patent number: 7579405Abstract: The present invention provides a primer for a thermoplastic and/or elastomeric substrate, the primer comprising a film of an epoxy-modified polymer selected from the group consisting of an epoxy-modified-thermoplastic polymer, an epoxy-modified-thermoplastic polymeric composite, an epoxy-modified-elastomeric polymer, an epoxy-modified-elastomeric polymeric composite, a blend thereof, and any mixture thereof. Also provided are methods of repairing, inserting, assembling and coating a thermoplastic or elastomeric substrate using the primer of the present invention.Type: GrantFiled: May 20, 2005Date of Patent: August 25, 2009Assignee: National Research Council of CanadaInventors: Minh-Tan Ton-That, Kenneth C. Cole, Johanne Denault
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Patent number: 7572865Abstract: The present invention is a polyester film obtained by blending 10-90 wt % of polyester (A) containing ethylene terephthalate as a main constituent component and 90-10 wt % of crystalline polyester (B) different from this polyester (A), which has a half value width of a recrystallization peak obtained by a differential scanning calorimeter (DSC) by lowering temperature of not more than 0.25. The crystalline polyester (B) is preferably a polyester selected from polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT) and polyethylene 2,6 naphthalate (PEN).Type: GrantFiled: January 9, 2003Date of Patent: August 11, 2009Assignee: Toyo Boseki Kabushiki KaishaInventors: Katsuya Itoh, Shinya Higashiura, Toru Kotani, Shinji Fujita
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Patent number: 7572756Abstract: A water-base fluid for use in drilling, cementing, workover, fracturing and abandonment of subterranean wells through a formation containing shale which swells in the presence of water. In one illustrative embodiment, the drilling fluid is composed of an aqueous based continuous phase, a weighting agent, and a shale hydration inhibition agent. The shale hydration inhibition agent should have the general formula: in which R and R? independently selected from hydrogen, methyl, ethyl or propyl, and X has a value from 1 to 6. The shale hydration inhibition agent is present in sufficient concentration to substantially reduce the swelling of shale drilling cuttings upon contact with the drilling fluid. The drilling fluid may be formulated to include a wide variety of components of aqueous based drilling fluids, such as weighting agents, fluid loss control agents, suspending agents, viscosifying agents, rheology control agents, as well as other compounds and materials known to one of skill in the art.Type: GrantFiled: November 7, 2007Date of Patent: August 11, 2009Assignee: M-I L.L.C.Inventors: Arvind D. Patel, Emanuel Stamatakis
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Patent number: 7557167Abstract: Crosslinked polymer compositions have backbones with first and second divalent saturated aliphatic moieties, a divalent saturated aliphatic secondary alcohol moiety, and a trivalent saturated aliphatic moiety. Hydrolytically labile ester bonds joined together these moieties. These polyesters may be polycondensation reaction products of a diol, a triol and a diacid. A molar ratio of the first divalent saturated aliphatic moiety, the divalent saturated aliphatic secondary alcohol moiety, and the trivalent saturated aliphatic moiety to the second divalent saturated aliphatic moiety is in the range of about 0.85 to about 1.5. Preferably, these polyesters are non-cytotoxic, biocompatible, bioabsorbable, or exhibit shape memory behavior with at least one transition temperature of greater than about 30° C. and less than about 100° C. and most preferably exhibit each of these qualities. The compositions may be adapted for a wide variety of uses, including medical applications.Type: GrantFiled: September 28, 2006Date of Patent: July 7, 2009Assignee: Gore Enterprise Holdings, Inc.Inventors: Brian J. Swetlin, Kenneth A. Mazich, Shaun Adkins Leone
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Patent number: 7550542Abstract: A synthetic polymer has a water-soluble or water-swellable polymer backbone and terminal groups and/or intermediate groups of blocks of hydrophobes of alkyl- or aryl compounds containing a polymerizable cyclic monomer or a polymerizable double bond (or alkene) group or derivatives thereof. The blocks of hydrophobes are composed of two or more units of the same or different hydrophobes. These synthetic polymers are used as rheology modifiers, especially in latex paints.Type: GrantFiled: January 7, 2005Date of Patent: June 23, 2009Assignee: Hercules IncorporatedInventors: Kirill N. Bakeev, De-Kai Loo, Angie H. Ma, Tuyen T. Nguyen, Jeffrey K. Politis
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Patent number: 7550412Abstract: The invention provides a method for producing guar gum, the method comprising the steps of: (a) sizing husk from guar seed into larger pieces and smaller pieces, (b) washing the larger pieces, (c) soaking the larger pieces, and (d) flaking the larger pieces to obtain guar gum. The invention also provides a method for processing undehusked guar splits, the method comprising the steps of: (a) dehusking undehusked guar splits to obtain dehusked guar splits and husk, and (b) sizing the husk into larger pieces and smaller pieces.Type: GrantFiled: November 30, 2005Date of Patent: June 23, 2009Assignee: Halliburton Energy Services, Inc.Inventors: Ronnie G. Morgan, Lewis R. Norman, Rickey L. Morgan
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Patent number: 7544747Abstract: The present invention relates to fullerene derivatives including a pendant group that may be reacted to prepare a composition including a plurality of covalently bound fullerenes. The pendant group may be a cyclic ether, such as an epoxide. The present invention also relates to compositions including reaction products of these fullerene derivatives and photovoltaic devices including such polymeric compositions.Type: GrantFiled: December 7, 2007Date of Patent: June 9, 2009Assignee: Konarka Technologies, Inc.Inventors: Russell Gaudiana, Savvas Hadjikyriacou, David Waller, Zhengguo Zhu
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Patent number: 7538165Abstract: The invention provides an electrically conductive polyaniline composition comprising polyaniline which contains at least one of novolac resins selected from the group consisting of phenolsulfonic acid novolac resin and naphtholsulfonic acid novolac resin as a dopant. The electrically conductive polyaniline composition is obtained by contacting polyaniline with an aqueous solution of the novolac resin to dope the polyaniline with the novolac resin. The invention further provides an electrically conductive polyaniline film which comprises the polyaniline containing the novolac resin as a dopant. The electrically conductive polyaniline film is obtained by contacting film of polyaniline with an aqueous solution of the novolac resin to dope the polyaniline.Type: GrantFiled: June 26, 2002Date of Patent: May 26, 2009Assignee: Nitto Denko CorporationInventor: Masao Abe
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Patent number: 7521398Abstract: A method of using a water-base wellbore fluid in subterranean wells that penetrate through a subterranean formation containing a shale which swells in the presence of water. The well bore fluid includes, an aqueous based continuous phase, and a shale hydration inhibition agent. One illustrative shale hydration inhibition agent is preferably the reaction product of a hydrogenation reaction of the product of the reaction of an aromatic amine with an aldehyde, preferably formaldehyde. Alternatively the shale hydration inhibition agent may be the reaction product of a hydrogenation reaction of the product of the reaction of aniline and formaldehyde. In one illustrative embodiment, the shale hydration inhibition agent is selected from the class of compounds known as polycycloaliphatic amines. Further the shale hydration inhibition agent may be present in the form of a free-base or in the form of an acid salt of the disclosed amine compounds.Type: GrantFiled: May 6, 2005Date of Patent: April 21, 2009Assignee: M-I L.L.C.Inventors: Arvind D. Patel, Emanuel Stamatakis
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Patent number: 7517937Abstract: The present invention relates a biodegradable resin composition comprising an L-lactic acid unit-containing resin (1) and a D-lactic acid unit-containing resin (2). Also disclosed is a biodegradable resin molded article obtained from the biodegradable resin composition.Type: GrantFiled: February 27, 2004Date of Patent: April 14, 2009Assignee: Nishikawa Rubber Co., Ltd.Inventors: Toru Yano, Nobuyuki Sakuda
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Patent number: 7517924Abstract: According to the present invention there is provided a composition as obtained from a melt comprising esterified starch, preferably having a degree of substitution of at least about 1.5, and preferably an amylose content of at least about 50% by weight with respect to that of the starch, and a linear polyester. The invention further provides the composition in the form of a melt or when shaped into articles.Type: GrantFiled: December 30, 1994Date of Patent: April 14, 2009Assignee: Japan Corn Starch Co., Ltd.Inventors: Stephen Rimsa, Paul Tatarka
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Patent number: 7514392Abstract: A water-base wellbore fluid for use in subterranean wells that penetrate through a subterranean formation containing a shale which swells in the presence of water. The well bore fluid includes, an aqueous based continuous phase, and a shale hydration inhibition agent. One illustrative shale hydration inhibition agent is preferably the reaction product of a hydrogenation reaction of the product of the reaction of an aromatic amine with an aldehyde, preferably formaldehyde. Alternatively the shale hydration inhibition agent may be the reaction product of a hydrogenation reaction of the product of the reaction of aniline and formaldehyde. In one illustrative embodiment, the shale hydration inhibition agent is selected from the class of compounds known as polycycloaliphatic amines. The shale hydration inhibition agent may be present in the form of a free-base or preferably in the form of an acid salt of the disclosed amine compounds.Type: GrantFiled: May 6, 2005Date of Patent: April 7, 2009Assignee: M-I L.L.C.Inventors: Arvind D. Patel, Emanuel Stamatakis
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Patent number: 7507695Abstract: A composition for inhibiting or preventing the formation of emulsions in the presence of treating acids during the acid stimulation of hydrocarbon wells is provided. The composition includes an alkyl aryl sulfonic acid or salt thereof, an acetylenic alcohol, an alkyl diphenyl oxide sulfonic acid or derivative thereof, in an alkyl alcohol solvent. The disclosed compositions can be used in an acid treatment solution, such as 15% hydrochloric acid, to prevent and resolve live acid and spent acid emulsions for a wide range of crude oils.Type: GrantFiled: October 21, 2005Date of Patent: March 24, 2009Assignee: BJ Services CompanyInventor: Malcolm Stuart Knopp
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Patent number: 7504366Abstract: Methods of treating a portion of a subterranean formation, comprising: providing an aqueous treatment fluid comprising water, and a friction reducing copolymer that comprises acrylamide and an acrylic acid ester; and introducing the aqueous treatment fluid into the portion of the subterranean formation. Methods of fracturing a subterranean formation comprising: providing an aqueous treatment fluid comprising water, and a friction reducing copolymer that comprises acrylamide and an acrylic acid ester; and introducing the aqueous treatment fluid into the subterranean formation at or above a pressure sufficient to create one or more fractures in the subterranean formation. Aqueous treatment fluids comprising: an aqueous fluid and a friction reducing copolymer that comprises acrylamide and an acrylic acid ester.Type: GrantFiled: August 16, 2006Date of Patent: March 17, 2009Assignee: Halliburton Energy Services, Inc.Inventors: Robert E. Hanes, Jr., David E. McMechan, Karen L. King, Jiten Chatterji
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Patent number: 7498385Abstract: Crosslinked polymer compositions have backbones with first and second divalent saturated aliphatic moieties, a divalent saturated aliphatic secondary alcohol moiety, and a trivalent saturated aliphatic moiety. Hydrolytically labile ester bonds joined together these moieties. These polyesters may be polycondensation reaction products of a diol, a triol and a diacid. A molar ratio of the first divalent saturated aliphatic moiety, the divalent saturated aliphatic secondary alcohol moiety, and the trivalent saturated aliphatic moiety to the second divalent saturated aliphatic moiety is in the range of about 0.85 to about 1.5. Preferably, these polyesters are non-cytotoxic, biocompatible, bioabsorbable, or exhibit shape memory behavior with at least one transition temperature of greater than about 30° C. and less than about 100° C. and most preferably exhibit each of these qualities. The compositions may be adapted for a wide variety of uses, including medical applications.Type: GrantFiled: February 26, 2007Date of Patent: March 3, 2009Assignee: Gore Enterprise HoldingsInventors: Brian J. Swetlin, Kenneth A. Mazich
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Patent number: 7494958Abstract: A water-base wellbore fluid for use in subterranean wells that penetrate through a subterranean formation containing a shale which swells in the presence of water. The well bore fluid includes, an aqueous based continuous phase, and a shale hydration inhibition agent. One illustrative shale hydration inhibition agent is preferably the reaction product of a hydrogenation reaction of the product of the reaction of an aromatic amine with an aldehyde, preferably formaldehyde. Alternatively the shale hydration inhibition agent may be the reaction product of a hydrogenation reaction of the product of the reaction of aniline and formaldehyde. In one illustrative embodiment, the shale hydration inhibition agent is selected from the class of compounds known as polycycloaliphatic amines. The shale hydration inhibition agent is present in sufficient concentration to substantially reduce the swelling of shale drilling cuttings upon contact with the fluid.Type: GrantFiled: May 6, 2005Date of Patent: February 24, 2009Assignee: M-I L.L.C.Inventors: Arvind D. Patel, Emanuel Stamatakis
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Patent number: 7488783Abstract: A process for the production of polylactide, the stages of which for the production and purification of lactide, starting from an aqueous solution of lactic acid or of its derivatives, includes evaporation of water with formation of oligomers, depolymerization to give lactide, condensation and then crystallization of the crude lactide product to give purified lactide, aqueous treatment of the residual fractions from the crystallization and polymerization of purified and/or prepurified lactide to give polylactide in an extruder and in the presence of catalysts. An alternative process includes carrying out the aqueous treatment before the crystallization.Type: GrantFiled: August 4, 2003Date of Patent: February 10, 2009Assignee: Brussels BiotechInventors: Philippe Coszach, Jean-Christophe Bogaert, Frederic Van Gansberghe
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Patent number: 7462671Abstract: The present invention relates to a thermoplastic resin composition which contains a thermoplastic polymer (A) containing a glutaric anhydride-containing component shown in the following general formula (1), where R1 and R2 are the same or different and each represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and a rubber-containing polymer compound (B), and satisfies the following conditions of (I) and/or (II), (I) a total light transmittance per 2 mm of the thickness of the thermoplastic resin composition is more than 90%, (II) a weight-average molecular weight of a thermoplastic polymer (A) is from 30,000 to 150,000 and a glass transition temperature is at least 130° C. According to the present invention, a thermoplastic composition having high heat resistance, superior mechanical properties, colorless transparency, optical isotropy and moldability, as well as solvent resistance, is provided.Type: GrantFiled: March 5, 2004Date of Patent: December 9, 2008Assignee: Toray Industries, Inc.Inventors: Hideki Matsumoto, Daisuke Sato, Akiko Tanaka, Toru Yamanaka
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Patent number: 7432230Abstract: A superior powder form of a metallic soap for enhancing the properties of an invert emulsion drilling fluid may be prepared by a dry process saponification reaction. The process includes mixing a source of metal cations with the product of a Diels-Alder reaction of dienophiles with fatty acids and/or resin acids and allowing the mixture to react. Heating the mixture increases the rate of reaction. The solid product is ground to form a powder. The properties of the drilling fluid that may be improved by adding the soap include filtration control, fluid loss control, emulsification and emulsion stability, and electrical stability.Type: GrantFiled: July 17, 2007Date of Patent: October 7, 2008Assignee: Halliburton Energy Service, Inc.Inventor: Jeffrey J. Miller