Sulfur Bonded Directly To Sulfur (e.g., Disulfides, Etc.) Patents (Class 568/21)
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Patent number: 6596772Abstract: The invention relates to trifluoromethyl sulfonyl and trifluoromethyl sulfonamido compounds and the physiologically acceptable salts and the prodrugs thereof. These compounds are expected to modulate the activity of protein tyrosine enzymes which are related to cellular signal transduction, in particular, protein tyrosine phosphatase, and therefore are expected to be useful in the prevention and treatment of disorders associated with abnormal protein tyrosine enzyme related cellular signal transduction such as cancer, diabetes, immuno-modulation, neurologic degenerative diseases, osteoporosis and infectious diseases. The invention also relates to the use of compounds containing fluoromethyl sulfonyl groups as phosphate mimics. These mimics may be used to inhibit, regulate or modulate the activity of a phosphate binding protein in a cell.Type: GrantFiled: August 25, 2000Date of Patent: July 22, 2003Assignee: Sugen, Inc.Inventors: Ping Huang, Chung Chen Wei, Peng Cho Tang, Chris Liang, John Ramphal, Bahija Jallal, John Biltz, Sharon Li, Matt Mattson, Gerald McMahon, Marcel Koenig
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Publication number: 20030105362Abstract: A filtering means containing gelatinous and solid materials is cleaned without dismantling the filtering means by contacting the gelatinous material inside the filtering means with a solvent, thereby physically degrading the gelatinous material such that the degraded gelatinous material can pass through the filtering means.Type: ApplicationFiled: May 9, 2002Publication date: June 5, 2003Applicant: Phillips Petroleum CompanyInventor: Brooks D. Bennett
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Patent number: 6555712Abstract: The present invention discloses a process for the preparation of a diorganotrisulfide said process by reacting an organic halide and elemental sulfur (&agr;-rhombic) using catalytic copper (II) halide and tin (II) halide in a mixture of organic solvents at 30-70° C.Type: GrantFiled: March 28, 2001Date of Patent: April 29, 2003Assignees: Indian Institute of Technology, Council of Scientific and Industrial ResearchInventors: Pradipta Sinha, Sujit Roy
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Publication number: 20030050511Abstract: A process is provided for the manufacture of liquid polysulfide polymers. In particular, the process allows for making the liquid form of the polysulfide polymer directly and eliminates the need to first make a solid polysulfide polymer and then convert it to a liquid.Type: ApplicationFiled: August 27, 2002Publication date: March 13, 2003Inventors: John Richard Gilmore, Keith Bradley Potts, Steven John Hobbs, Marc Edward Halpern, Thomas Dennis Mundle
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Patent number: 6518459Abstract: A filtering means containing gelatinous and solid materials is cleaned without dismantling the filtering means by contacting the gelatinous material inside the filtering means with a solvent, thereby physically degrading the gelatinous material such that the degraded gelatinous material can pass through the filtering means.Type: GrantFiled: July 26, 2001Date of Patent: February 11, 2003Assignee: Phillips Petroleum CompanyInventor: Brooks D. Bennett
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Publication number: 20020198410Abstract: The present invention discloses a process for the preparation of a diorganotrisulfide said process by reacting an organic halide and elemental sulfur (&agr;-rhombic) using catalytic copper (II) halide and tin (II) halide in a mixture of organic solvents at 30-70° C.Type: ApplicationFiled: March 28, 2001Publication date: December 26, 2002Applicant: INDIAN INSTITUTE OF TECHNOLOGYInventors: Pradipta Sinha, Sujit Roy
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Publication number: 20020188082Abstract: A novel vulcanizing agent giving a vulcanized rubber superior in heat aging resistance and reversion resistance, comprising an organic sulfur vulcanizing agent obtained by reaction of sulfur and norbornene or its derivative or dicyclopentadiene in the presence of catalyzing amounts of a vulcanization accelerator and an accelerator activator.Type: ApplicationFiled: March 5, 2001Publication date: December 12, 2002Applicant: THE YOKOHAMA RUBBER CO, LTD.Inventors: Yuko Nakata, Kazunori Ishikawa
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Patent number: 6489271Abstract: This invention relates to a lubricating composition comprising a major amount of an oil of lubricating viscosity and (a) a extreme pressure improving amount of at least one sulfur compound, and an antiwear or an extreme pressure improving amount of the combination of (b) at least one ammonium salt of a phosphoric acid ester, (c) at least one phosphite, and (d) at least one thiophosphate or at least one reaction product of a phosphite and sulfur or a source of sulfur. The invention also relates to concentrates and greases containing the combination of the sulfur is compound and the specific phosphorus compounds.Type: GrantFiled: August 20, 1996Date of Patent: December 3, 2002Assignee: The Lubrizol CorporationInventor: Robert C. Richardson
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Publication number: 20020143207Abstract: The synthesis of peptides comprising disulphide bridges is challenging since it is difficult to ensure that the correct cysteine residues combine to form the desired disulphide bridges. The present invention describes novel protection techniques useful in the preparation of peptides. Described is a process for the deprotection of an Acm-, MBzl- and/or tBu-protected thiol which comprises reacting said protected thiol with an acid in the presence of an oxidising agent at a temperature sufficient to effect deprotection and generation of disulphide bonds.Type: ApplicationFiled: January 18, 2002Publication date: October 3, 2002Inventor: Alan Cuthbertson
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Patent number: 6452052Abstract: Methods and compositions for preventing or treating allergic diseases of the eye, nose, skin, ear, gastrointestinal tract, airways or lung and preventing or treating manifestations of systemic mastocytosis are disclosed. The compositions contain a mast cell stabilizing disulfide derivative as an active ingredient.Type: GrantFiled: January 31, 2002Date of Patent: September 17, 2002Assignee: Alcon Universal Ltd.Inventors: Mark R. Hellberg, Zixia Feng, Steven T. Miller
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Patent number: 6437188Abstract: A process is provided for removing color byproducts and residues from a colored ditertiarydodecyldisulfide (DTDDDS) stream. Particularly, a process is provided for removing the color byproducts and residues from the colored DTDDDS stream with ammonium hydroxide (NH4OH) to produce a DTDDDS product.Type: GrantFiled: August 17, 2001Date of Patent: August 20, 2002Assignee: Chevron Phillips Chemical Company, LPInventor: Ernest B. Boston
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Patent number: 6433202Abstract: Aspirin (ASA) triggers a switch in the biosynthesis of lipid mediators, inhibiting prostanoid production and initiating 15-epi-lipoxin generation, through the acetylation of cyclooxygenase II.Type: GrantFiled: March 14, 2000Date of Patent: August 13, 2002Assignee: Brigham and Women's HospitalInventor: Charles N. Serhan
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Patent number: 6410793Abstract: A method wherein a gas stream containing carbon oxide and hydrogen sulfide is first passed in contact with a catalyst comprising a supported metal oxide of a metal selected from the group consisting of vanadium (V), niobium (Nb), molybdenum (Mo), chromium (Cr), rhenium (Re), tungsten (W), manganese (Mn), titanium (Ti), zirconium (Zr) and tantalum (Ta) and mixtures thereof to convert said carbon oxide and hydrogen sulfide to methyl mercaptans, (primarily methanethiol (CH3SH) and a small amount of dimethyl sulfide (CH3SCH3)), and the gas stream containing the methyl mercaptans are passed in contact with a catalyst comprising a supported metal oxide or a bulk metal oxide in the presence of an oxidizing agent and for a time sufficient to convert at least a portion of the methyl mercaptan to formaldehyde (CH2O), and sulfur dioxide (SO2).Type: GrantFiled: May 12, 1998Date of Patent: June 25, 2002Assignee: Lehigh UniversityInventor: Israel E. Wachs
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Patent number: 6376716Abstract: A process for the preparation of an aromatic thiophenol represented by the formula (I): Yn—Ar—(SH)m(I), wherein Ar represents an aromatic hydrocarbon; Y represents at least one substituent bonded to a carbon atom constituting the aromatic ring of Ar, which substituent is selected from the group consisting of halogen, nitro, nitrile, sulfone, sulfamoyl and hydrocarbylsulfonyl groups; m is an integer of 1 or more; and n is an integer of 1 or more, which comprises (a) reacting an aromatic thioether represented by the formula (II): Yn—Ar—(SR)m(II), wherein R represents a monovalent secondary or tertiary hydrocarbyl, or a monovalent primary hydrocarbyl group represented by the formula: —CH2—R1 or —CH2—CR2═C (R2)2, wherein R1 represents a monovalent aromatic ring group optionally substituted by a monovalent hydrocarbyl group, and each of R2 is the same or different from each other and represents hydrogen or a monovalent hydrocarbyl group, with (A) a Lewis acid inType: GrantFiled: May 4, 2000Date of Patent: April 23, 2002Assignee: Nippon Finechemical Co., Ltd.Inventors: Isamu Arai, Tutomu Yamaguchi, Yoko Hida
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Patent number: 6362374Abstract: The present invention is directed to a composition that contains polysulfides and that has a reduced odor level and to a method for reducing the odor of polysulfides. The composition contains a polysulfide and an inhibitor that reduces the odor level. The polysulfides include sulfurized olefins prepared by reacting the olefin with sulfur and H2S in the presence of a catalyst. The inhibitors are selected from the group consisting of hydrocarbyl acrylates and hydrocarbyl methacrylates. The method for reducing the odor level of polysulfides involves contacting the polysulfide with an inhibitor selected from the group consisting of hydrocarbyl acrylates and hydrocarbyl methacrylates under conditions that reduce the odor level.Type: GrantFiled: May 1, 2000Date of Patent: March 26, 2002Assignee: The Lubrizol CorporationInventors: David R. Forester, Roger L. Sowerby, Bharat B. Malik, Victor A. Gober
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Patent number: 6359046Abstract: The present invention discloses novel hydrocarbon core polysulfide silanes and methods of preparing the hydrocarbon core polysulfide silanes. Preferably, the silanes of the present invention contain assemblies of a single unit of a hydrolyzable silane group, tethered to one end of a chain of sulfur atoms, and several of these assemblies are bound to a common central hydrophobic core via the other end of the sulfur atoms chain. The hydrocarbon core polysulfide silanes may be incorporated into filled elastomeric compositions providing improved dispersiblity of the filler materials. Mineral fillers may be pre-treated with the hydrocarbon core polysulfide silanes prior to use in elastomeric compositions.Type: GrantFiled: September 8, 2000Date of Patent: March 19, 2002Assignee: Crompton CorporationInventor: Richard W. Cruse
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Patent number: 6331605Abstract: Oligomeric organosilanepolysulfanes which are built up from the three structural units A and/or B and/or C, in which Y=H, CN, —(CH2)nSiRR1R2; n=1-8, R, R1, R2 and R3, independently, represent H, (C1-C4)alkyl, (C1-C4)alkoxy, halogen or a OSiR1R2R3 group; x, as a statistical average, is 1-6, z, as a statistical average, is 2-6, n is 1-8 and o, p and q are each a whole, positive number between 1 and 40 where o+p+q may be ≧2 and <40, with the proviso that at least one structural unit A or B is present, and their use in rubber mixtures and to produce molded items, in particular pneumatic tires.Type: GrantFiled: June 10, 1999Date of Patent: December 18, 2001Assignee: Degussa AktiengesellschaftInventors: Hans-Detlef Lunginsland, Christoph Batz-Sohn
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Publication number: 20010051751Abstract: A filtering means containing gelatinous and solid materials is cleaned without dismantling the filtering means by contacting the gelatinous material inside the filtering means with a solvent, thereby physically degrading the gelatinous material such that the degraded gelatinous material can pass through the filtering means.Type: ApplicationFiled: July 26, 2001Publication date: December 13, 2001Applicant: Phillips Petroleum CompanyInventor: Brooks D. Bennett
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Patent number: 6303822Abstract: A method for the preparation of aromatic hydroxythiols including oxidizing an aromatic aminothiol to form an aminodisulfide compound; forming a bis-diazonium salt of the aminodisulfide compound; and reacting the bis-diazonium salt with water to form an aromatic hydroxyldisulfide compound, which is then reduced to the hydroxythiol. New bis-diazonium aromatic disulfide compounds are also disclosed.Type: GrantFiled: February 29, 2000Date of Patent: October 16, 2001Assignee: AlliedSignal Inc.Inventors: Mingbao Zhang, David Ryckman, Eric MacMillan
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Patent number: 6294698Abstract: The present invention is directed to new, energy-efficient photoinitiators in the form of organic sulfur-containing compounds. The present invention is also directed to a method of generating reactive species which includes exposing one or more photoinitiators to radiation to form one or more reactive species. Also described are methods of polymerizing unsaturated monomers, methods of curing an unsaturated oligomer/monomer mixture, and methods of laminating using the photoinitiators of the present invention.Type: GrantFiled: April 16, 1999Date of Patent: September 25, 2001Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Ronald S. Nohr, J. Gavin MacDonald
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Patent number: 6294699Abstract: A process useful for producing an organic disulfide is disclosed. The process can include contacting mercaptans with a solid catalyst selected from the group consisting of a Group IIA metal oxide; 2) an alumina material consisting essentially of alumina; 3) an impregnated alumina impregnated with a metal selected from the group consisting of cobalt, molybdenum, tungsten, nickel and combinations of any two or more thereof; 4) an acidic ion-exchange resin; 5) a basic ion-exchange resin; and 6) combinations of any two or more thereof; in the presence of sulfur dioxide and in the substantial absence of a liquid oxidation catalyst to thereby produce organic disulfides.Type: GrantFiled: March 31, 2000Date of Patent: September 25, 2001Assignee: Richmond, Hitchcock, Fish & DollarInventors: Mitchell D. Refvik, James Edward Shaw
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Patent number: 6284926Abstract: A filtering means containing gelatinous and solid materials is cleaned without dismantling the filtering means by contacting the gelatinous material inside the filtering means with a solvent, thereby physically degrading the gelatinous material such that the degraded gelatinous material can pass through the filtering means.Type: GrantFiled: June 6, 2000Date of Patent: September 4, 2001Assignee: Richmond, Hitchcock, Fish & DollarInventor: Brooks D. Bennett
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Patent number: 6265476Abstract: Radiation-curable compositions, having high elongation at break and toughness after cure can include the following pre-mixture components: a) a polymer, oligomer or monomer having at least one (meth)acrylate functional group; b) an oligomer or monomer, exclusive of (meth)acrylate functional groups, having an ethylenically unsaturated functional group; and c) an elongation promoter; wherein the composition, after radiation-cure, has an elongation at break of at least about 200%. Glass substrates and optical fibers are coated with the radiation-curable composition. Monofilament fiber or a plurality of fiber filaments, such as sewing thread, are coated with the radiation-curable binder composition, which after cure, demonstrates high elongation at break.Type: GrantFiled: October 4, 1999Date of Patent: July 24, 2001Assignee: DSM N.V.Inventors: Vadim V. Krongauz, Michael G. Sullivan, Stephen C. Lapin, Edward J. Murphy
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Publication number: 20010005766Abstract: A composition based on dimethyl disulphide (DMDS) with a masked smell according to the invention comprises, by weight, at least 95% of DMDS, less than 500 ppm of methyl mercaptan, less than 100 ppm of dimethylsulphide and up to 1% of at least one odor-masking agent.Type: ApplicationFiled: July 12, 1999Publication date: June 28, 2001Inventor: GEORGES FREMY
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Patent number: 6242652Abstract: Selectively producing organic trisulfides by contacting, in the presence of a catalyst, a mercaptan and a sulfur compound under conditions sufficient to produce a organic polysulfides and hydrogen sulfide and controlling the concentration of hydrogen sulfide in the liquid reaction solution during specific reaction periods such that the production of organic trisulfide is enhanced and the production organic polysulfides having more or less than three sulfur atoms is inhibited.Type: GrantFiled: March 3, 2000Date of Patent: June 5, 2001Assignee: Phillips Petroleum CompanyInventor: Brooks D. Bennett
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Patent number: 6235941Abstract: An aqueous solution of basic mercaptide salt and water-soluble peroxide are mixed together in a reaction zone and maintained under reaction conditions effective to produce a vapor phase comprising organic disulfide, and concurrently vapor phase is recovered from the reaction zone. The process is highly efficient and enables production of organic disulfides in high yield and purity. Not only is the process very easy and simple to carry out, but in addition the process (i) eliminates the need for forming an organic phase of liquid organic disulfide product and conducting a separation between such product and the total aqueous phase used in the reaction, (ii) enables efficient control of a highly exothermic reaction, and (iii) minimizes alkanesulfonic acid salt formation during the reaction.Type: GrantFiled: February 13, 1998Date of Patent: May 22, 2001Assignee: Albemarle CorporationInventors: Chi Hung Cheng, Gerald M. Sulzer
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Patent number: 6187960Abstract: A process which can be used to produce organic polysulfide compounds is provided. The process comprises contacting, in the presence of a catalyst, an organic disulfide with sulfur under conditions sufficient to produce an organic polysulfide wherein the organic disulfide, sulfur, and catalyst are each present in an amount effective to produce an organic polysulfide and the catalyst comprises a base and a surfactant.Type: GrantFiled: February 14, 1995Date of Patent: February 13, 2001Assignee: Phillips Petroleum CompanyInventor: James E. Shaw
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Patent number: 6169210Abstract: A highly efficient method of producing dialkyl disulfides from mercaptans and oxygen is described which involves employing carbon dioxide as an internal coolant. Among the benefits made possible by this method are (1) an increase in the proportion of mercaptan converted to dialkyl disulfide per pass through the reactor, (2) an increased ease of separation of and recycling of carbon dioxide, (3) the ability to use a common contaminant as a coolant, and (4) the use of a simple adiabatic reactor design.Type: GrantFiled: April 20, 1999Date of Patent: January 2, 2001Inventor: Kaung-Far Lin
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Patent number: 6114586Abstract: A process for stabilizing and deodorizing a raw organic polysulfide by treating it with an alkylene carbonate in the presence of a basic catalyst and, optionally, a sulfur donor.Type: GrantFiled: January 22, 1999Date of Patent: September 5, 2000Assignee: Elf Atochem S.A.Inventors: Jean-Fran.cedilla.ois Devaux, Georges Fremy, Yves Labat
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Patent number: 6051739Abstract: A process for producing an organic polysulfide compound comprises contacting, in the presence of a catalyst, a mercaptan with elemental sulfur to produce a product medium and contacting the product medium with a material comprising carbon dioxide or a carbon dioxide-generating compound wherein the catalyst comprises a base and optionally a surfactant and the organic polysulfide contains about 3 or more sulfur atoms per molecule.Type: GrantFiled: January 26, 1999Date of Patent: April 18, 2000Assignee: Phillips Petroleum CompanyInventor: James E. Shaw
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Patent number: 6020529Abstract: A process for the manufacture of organic disulphides and polysulphides using a basic resin catalyst wherein the catalyst is a polystyrene-divinylbenzene resin functionalized with ethylenediamine or a polyethylenepolyamine groups.Type: GrantFiled: January 19, 1999Date of Patent: February 1, 2000Assignee: Elf Atochem S.A.Inventor: Georges Fremy
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Patent number: 5969191Abstract: A method wherein a gas stream containing a methyl mercaptan is passed in contact with a catalyst comprising a supported metal oxide or a bulk metal oxide in the presence of an oxidizing agent and for a time sufficient to convert at least a portion of the methyl mercaptan to formaldehyde (CH.sub.2 O) and sulfur dioxide (SO.sub.Type: GrantFiled: October 6, 1997Date of Patent: October 19, 1999Assignee: Lehigh UniversityInventor: Israel E. Wachs
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Patent number: 5907064Abstract: A process for producing an organic trisulfide compound comprises contacting, in the presence of a catalyst, a mercaptan with an organic polysulfide compound to produce a product mixture and optionally contacting the product mixture with an acid wherein the catalyst comprises a base and surfactant and the organic polysulfide contains about 4 or more sulfur atoms per molecule.Type: GrantFiled: May 19, 1998Date of Patent: May 25, 1999Assignee: Phillips Petroleum Co.Inventor: James E. Shaw
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Patent number: 5861539Abstract: A composition comprising a base and an alkoxylated compound selected from an alkoxylated alcohol and alkoxylated mercaptan is disclosed. The composition can be used to catalyze the reaction of a mercaptan and an elemental sulfur to produce a polysulfide compound. The polysulfide compound can be further treated with an alkylene oxide to reduce the mercaptan sulfur content of the polysulfide compound.Type: GrantFiled: August 28, 1997Date of Patent: January 19, 1999Assignee: Phillips Petroleum CompanyInventor: James E. Shaw
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Patent number: 5792787Abstract: Dithiocarboxylates, and in particular, dithiocarbamates, block the induced expression of the endothelial cell surface adhesion molecule VCAM-1, and are therefor useful in the treatment of cardiovascular disease, including atherosclerosis, post-angioplasty restenosis, coronary artery diseases, and angina, as well as noncardiovascular inflammatory diseases that are mediated by VCAM-1.Type: GrantFiled: June 7, 1995Date of Patent: August 11, 1998Assignee: Emory UniversityInventors: Russell M. Medford, R. Wayne Alexander, Margaret K. Offermann
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Patent number: 5786511Abstract: The preparation of organic disulphides and polysulphides by reaction of sulphur with a mercaptan or with a polysulphide of lower sulphur order in order to convert it into polysulphide of higher order, or alternatively by reaction of a mercaptan with an organic polysulphide of high sulphur order in order to convert it into polysulphide of lower sulphur order, in the presence of a catalyst in the form of a resin with a basic function, characterized in that the resin is based on polystyrene-divinylbenzene (PS-DVB) functionalized with primary amino groups and having the general formula (I): ##STR1## being the PS-DVB resin support, L being a linear organic radical which is as long as or longer than the methylene radical (--CH.sub.2 --).Type: GrantFiled: December 11, 1996Date of Patent: July 28, 1998Assignee: Elf Aquitaine ProductionInventor: Emmanuel Arretz
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Patent number: 5783596Abstract: Dithiocarboxylates, and in particular, dithiocarbamates, block the induced expression of the endothelial cell surface adhesion molecule VCAM-1, and are therefor useful in the treatment of cardiovascular disease, including atherosclerosis, post-angioplasty restenosis, coronary artery diseases, and angina, as well as noncardiovascular inflammatory diseases that are mediated by VCAM-1.Type: GrantFiled: June 7, 1995Date of Patent: July 21, 1998Assignee: Emory UniversityInventors: Russell M. Medford, Margaret K. Offermann, R. Wayne Alexander, Sampath Parthasarathy
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Patent number: 5777087Abstract: The present invention provides novel aryl diphosphines having the formula ##STR1## wherein X, Y, R.sub.1-18, m, m' and n are defined herein, and which can be complexed with a transition metal to form a novel catalyst useful in such applications as hydroformylation.Type: GrantFiled: April 18, 1996Date of Patent: July 7, 1998Assignee: Celanese International CorporationInventors: Christian W. Kohlpaintner, Brian E. Hanson, Hao Ding
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Patent number: 5773231Abstract: A method for the treatment of cardiovascular diseases and noncardiovascular inflammatory diseases that are mediated by VCAM-1 is provided that includes the removal, decrease in the concentration of, or prevention of the formation of oxidized polyunsaturated fatty acids, or interferes with a complex formed between a polyunsaturated fatty acid or an oxidized polyunsaturated fatty acid and a protein or peptide that mediates the expression of VCAM-1. A method is also provided for suppressing the expression of a redox-sensitive gene or activating a gene that is suppressed through a redox-sensitive pathway, that includes administering an effective amount of a substance that prevents the oxidation of the oxidized signal, and typically, the oxidation of a polyunsaturated fatty acid, or interferes with a complex formed between the oxidized signal and a protein or peptide that mediates the expression of the redox gene.Type: GrantFiled: June 7, 1995Date of Patent: June 30, 1998Assignee: Emory UniversityInventors: Russell M. Medford, R. Wayne Alexander, Sampath Parthasarathy, Bobby V. Khan
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Patent number: 5773209Abstract: A method for the treatment of cardiovascular diseases and noncardiovascular inflammatory diseases that are mediated by VCAM-1 is provided that includes the removal, decrease in the concentration of, or prevention of the formation of oxidized polyunsaturated fatty acids, or interferes with a complex formed between a polyunsaturated fatty acid or an oxidized polyunsaturated fatty acid and a protein or peptide that mediates the expression of VCAM-1. A method is also provided for suppressing the expression of a redox-sensitive gene or activating a gene that is suppressed through a redox-sensitive pathway, that includes administering an effective amount of a substance that prevents the oxidation of the oxidized signal, and typically, the oxidation of a polyunsaturated fatty acid, or interferes with a complex formed between the oxidized signal and a protein or peptide that mediates the expression of the redox gene.Type: GrantFiled: June 7, 1995Date of Patent: June 30, 1998Assignee: Emory UniversityInventors: Russell M. Medford, R. Wayne Alexander, Sampath Parthasarathy, Bobby V. Khan
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Patent number: 5767229Abstract: In a process for the preparation of organic disulphides and polysulphides by reaction of sulphur with a mercaptan or with a polysulphide of lower sulphur order in order to convert it into polysulphide of higher order, or alternatively by reaction of a mercaptan with an organic polysulphide of a high sulphur order in order to convert it into a polysulphide of lower sulphur order, in the presence of a catalyst in the form of a resin with a basic function, the resin is based on a polystyrene-divinyl benzene support functionalized with guanidine or amidine groups, and the reaction is preferably conducted in the presence of methanol.Type: GrantFiled: December 11, 1996Date of Patent: June 16, 1998Assignee: Elf Aquitaine ProductionInventors: Emmanuel Arretz, Frederic Lopez
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Patent number: 5741932Abstract: A process for the preparation of ajoene using cyclodextrin comprising mixing allicin, where appropriate dissolved in water and/or a water-miscible solvent, with .alpha.-cyclodextrin, .beta.-cyclodextrin, .gamma.-cyclodextrin or any desired mixture of these cyclodextrins; and processing to a water-containing composition; drying this composition; and obtaining the resulting ajoene by decomplexation and extraction from the dried composition.Type: GrantFiled: November 13, 1995Date of Patent: April 21, 1998Assignee: Consortium fur elektrochemische Industrie GmbHInventors: Guenter Dressnandt, Heinz Rockinger, Helmut Prigge, Arno Treiber
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Patent number: 5710256Abstract: The present invention is directed to novel methadone derivatives which are synthesized for the covalent attachment to antigens (proteins or polypeptides) for the preparation of antibodies or receptors to methadone and methadone metabolites. The resulting novel antigens may be used for the production of antibodies or receptors using standard methods. Once generated, the antibodies or receptors and the novel derivatives which are covalently attached to proteins, polypeptides or labels may be used in the immunoassay process.Type: GrantFiled: April 3, 1995Date of Patent: January 20, 1998Assignee: Biosite Diagnostics IncorporatedInventor: Kenneth F. Buechler
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Patent number: 5679626Abstract: Sulphur-containing substances are derived from mono- or polyethylenic hydrocarbons by sulphurization using elemental sulphur in the presence of at least one alkali or alkaline-earth metal hydroxide and at least one glycol or polyglycol, or glycol or polyglycol monoether and/or water. Sulphur-containing substances, which may contain 20% to 70% by weight of sulphur, are generally soluble in lubricants to improve antiwear and extreme pressure properties. They can also be used as sulphurization agents, in particular for preparing catalysts for refining petroleum products.Type: GrantFiled: November 28, 1995Date of Patent: October 21, 1997Assignee: Institut Francais du PetroleInventors: Maurice Born, Bruno Delport, Thierry Lacome
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Patent number: 5565517Abstract: A process for preparing an organic polysulfide polymer, such as polyethylene trisulfide, is provided which comprises contacting a dimercaptan such as 1,2-ethanedithiol with elemental sulfur using a basic catalyst wherein the dimercaptan, elemental sulfur, and basic catalyst are each present in an effective amount to effect the preparation of the organic polysulfide polymer. A process for controlling the molecular weight of an organic polysulfide polymer is also provided which comprises contacting a mercaptan with a dimercaptan and sulfur, in the presence of a basic catalyst, under conditions sufficient to prepare an organic polysulfide polymer.Type: GrantFiled: November 16, 1994Date of Patent: October 15, 1996Assignee: Phillips Petroleum CompanyInventors: Howard F. Efner, James E. Shaw
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Patent number: 5559271Abstract: A composition which comprises a major amount of an organic polysulfide and an odor-masking amount of an odor-masking compound selected from the group consisting of wintergreen, cinnamons, vanillins, terpenes, sesquiterpenes, and combinations of any two or more thereof is provided wherein the composition has a more pleasant odor than the organic polysulfide.Type: GrantFiled: July 26, 1995Date of Patent: September 24, 1996Assignee: Phillips Petroleum CompanyInventors: James E. Shaw, Howard F. Efner
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Patent number: 5463042Abstract: A layered double hydroxide intercalated with a metal complex of a polyaryl compound is described. A preferred complex is porphin or phthylocyanine. The metals are preferably selected from Group VII-B and Group VIII cobalt and iron triads. The resulting LDH metal complexes are useful for the oxidation of oxidate compounds such as thiols and phenols.Type: GrantFiled: January 25, 1994Date of Patent: October 31, 1995Assignee: Board of Trustees operating Michigan State UniversityInventors: Thomas J. Pinnavaia, Elena M. Perez-Bernal, Ricardo Ruarno-Casero, Malama Chibwe
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Patent number: 5462810Abstract: A magnetic recording medium comprises a nonmagnetic substrate and at least one ferromagnetic metal layer applied thereon and a protective layer formed on this metal layer and consisting of a compound which consists of an unfluorinated or partially fluorinated alkyl radical and a disulfide, hydroxyl or keto group.Type: GrantFiled: January 11, 1994Date of Patent: October 31, 1995Assignee: BASF Magnetics GmbHInventors: Harald Keller, Ulrich Jaeger, Helmut Steininger, Helmut Kopke, Klaus D. Schomann, Hans-Peter Schildberg
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Patent number: 5457234Abstract: A process for reducing the metal corrosiveness of an organic polysulfide comprises contacting the polysulfide with a metal such as a transition metal at an elevated temperature. A process for reducing the concentration of a polysulfide, having four or more sulfur atoms in the polysulfide molecule, in a polysulfide mixture is also provided which comprises contacting the polysulfide mixture with a metal such as a transition metal. Further provided is a process for reducing the concentration of an organic trisulfide in a mixture of an organic disulfide and trisulfide wherein the process comprises contacting the mixture with a metal such as a transitional metal.Type: GrantFiled: June 20, 1994Date of Patent: October 10, 1995Assignee: Phillips Petroleum CompanyInventor: James E. Shaw
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Patent number: 5410088Abstract: A process for preparing, in high yield, a sulfurized olefinic product for use in lubricating oil compositions having a low chlorine content, a sulfur content of from about 40 to about 50 weight percent and a viscosity at 100.degree. C. of less than about 20 cSt.Type: GrantFiled: October 7, 1993Date of Patent: April 25, 1995Assignee: Ethyl Petroleum Additives, Inc.Inventors: Peggy J. Harris, Clive R. Richardson