Patents Examined by Tanaga Anne Boozer
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Patent number: 5900520Abstract: Alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a paraffin alkylating agent under alkylation reaction conditions in the presence of catalyst comprising synthetic porous crystalline material characterized by an X-ray diffraction pattern including interplanar d-spacings at 12.36.+-.0.4, 11.03.+-.0.2, 8.83.+-.0.14, 6.18.+-.0.12, 6.00.+-.0.10, 4.06.+-.0.07, 3.91.+-.0.07, and 3.42.+-.0.06 Angstroms.Type: GrantFiled: January 23, 1995Date of Patent: May 4, 1999Assignee: Mobil Oil CorporationInventors: Dominick N. Mazzone, David O. Marler, Kathleen M. Keville, Larry A. Green
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Patent number: 5863857Abstract: An adsorbent containing composition for use in an insulating glass unit is provided. The composition includes a depolymerized butyl rubber having a low viscosity average molecular weight which is a carrier for moisture and volatile organic chemical adsorbing materials. The composition is economical to produce and results in a composition which effectively desiccates a sealed insulating glass unit without the problem of chemical fogging.Type: GrantFiled: June 24, 1996Date of Patent: January 26, 1999Assignee: Adco Products, Inc.Inventors: Kathleen Louise Lamb, Brian Jonathan Briddell
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Patent number: 5849973Abstract: A catalyst for oxidative coupling of methane comprising Fe.sub.2 O.sub.3 deposited on a silica substrate, said silica substrate having particle sizes in the range of about 150 to 215 .mu.m, and a method for producing said catalyst in which particles of Fe.sub.2 O.sub.3, with a particle size in the range from 100 to 150 .mu.m, and particles of silica, with a particle size in the range from about 150 to about 215 .mu.m are mixed together. The particles are heated to a temperature of at least about 800.degree. C., after which the silica particles impregnated with Fe.sub.2 O.sub.3 are separated from the remaining iron particles.Type: GrantFiled: January 21, 1997Date of Patent: December 15, 1998Assignee: Gas Research InstituteInventor: Donald R. Van Der Vaart
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Patent number: 5821194Abstract: A catalyst for purifying the exhaust gas of vehicles having a metallic flat substrate in a scroll form, a metallic corrugated substrate formed in a scroll and engaged with the flat substrate, an intermediate layer of ceramic provided on both surfaces of the flat and the corrugated substrates, and a catalytic layer provided on the intermediate layer. The corrugated substrate and the flat substrates have a plurality of holes which are filled with the intermediate layer of ceramic.Type: GrantFiled: October 15, 1996Date of Patent: October 13, 1998Assignee: Kia Motors CorporationInventor: Chi-Bum In
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Patent number: 5814576Abstract: A catalyst for purifying exhaust gas from an automotive internal combustion engine. The catalyst comprises a monolithic carrier which is coated with a catalyst component carrying layer which includes rhodium and a zirconium oxide. The zirconium oxide contains at least one element selected from the group consisting of magnesium, calcium, strontium, barium, yttrium and lanthanum. The zirconium oxide in the catalyst component carrying layer has a composition represented by a general formula of ?X!.sub.a Zr.sub.b O.sub.c where X is at least one element selected from the group consisting of magnesium, calcium, strontium, barium, yttrium and lanthanum; and a, b and c indicate ratios in number of atoms, in which a is within a range of from 0.01 to 0.6 on the assumption of b being 1.0, and c is a number of oxygen atom which satisfies valence of respective elements.Type: GrantFiled: November 25, 1996Date of Patent: September 29, 1998Assignee: Nissan Motor Co., Ltd.Inventor: Shinji Yamamoto
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Patent number: 5798148Abstract: Microporous polytetrafluoroethylene is metallised with 1 micron platinum, which is plasma-oxygenated then plasma-hydrogenated, whereby to increase the surface area of the platinum. The resulting composite body has applications as a catalyst or electrode.Type: GrantFiled: August 26, 1996Date of Patent: August 25, 1998Assignee: British Technology Group LimitedInventors: Thomas Ronald Thomas, Jas Pal Singh Badyal
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Patent number: 5763728Abstract: An HF-agent complex, such as HF-pyridine complex where the complexing agent is pyridine, is recovered and recycled from a by-product containing stream in an alkylation process using the complex by (a) selectively removing a portion of the HF from the by-product stream to produce an HF-depleted stream having a molar ratio of HF per Lewis base site of the complexing agent of 3:1 to 5:1, (b) separating the resulting HF-depleted stream into a hydrocarbon phase enriched in ASO and an acid phase depleted in ASO and containing a substantial portion of the complex, and (c) recycling the acid phase to the hydrocarbon alkylation step.Type: GrantFiled: September 25, 1995Date of Patent: June 9, 1998Assignee: UOPInventors: Joseph A. Kocal, Harold U. Hammershaimb, Robert J. Cornish, Terry L. Marker, James F. Himes
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Patent number: 5747410Abstract: Nitrogen oxides are removed from an exhaust gas containing nitrogen oxides and oxygen in an amount larger than its stoichiometric amount relative to unburned components in the exhaust gas, by using an exhaust gas cleaner having Ag supported by a porous inorganic oxide body and second catalyst containing second catalytically active components supported by a porous inorganic oxide body. The second catalytically active components consist essentially of Cu and/or other metals such as alkali metal elements, rare earth elements, etc.Type: GrantFiled: May 18, 1995Date of Patent: May 5, 1998Assignee: Kabushiki Kaisha RikenInventors: Gyo Muramatsu, Kazuhiko Ogiwara, Kiyohide Yoshida, Akira Abe, Naoko Irite, Shoji Mochida, Katsuji Onai
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Patent number: 5696048Abstract: Cobalt catalysts whose catalytically active composition comprises from 55 to 98% by weight of cobalt, from 0.2 to 15% by weight of phosphorus, from 0.2 to 15% by weight of manganese and from 0.05 to 5% by weight of alkali metal, calculated as oxide, are prepared by calcining the catalyst composition, reducing it at final temperatures of from 200.degree. to 400.degree. C. in a stream of hydrogen and subsequently surface-oxidizing it by treatment in a stream of air at final temperatures of from 20.degree. to 60.degree. C. and can be used in a process for hydrogenating organic nitriles and/or imines.Type: GrantFiled: April 30, 1996Date of Patent: December 9, 1997Assignee: BASF AktiengesellschaftInventors: Boris Breitscheidel, Peter Polanek, Guido Voit, Tom Witzel, Gerd Linden, Michael Hesse
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Patent number: 5693588Abstract: Mixed metal oxide pellets for removing hydrogen sulfide from fuel gas mixes derived from coal are stabilized for operation over repeated cycles of desulfurization and regeneration reactions by addition of a large promoter metal oxide such as lanthanum trioxide. The pellets, which may be principally made up of a mixed metal oxide such as zinc titanate, exhibit physical stability and lack of spalling or decrepitation over repeated cycles without loss of reactivity. The lanthanum oxide is mixed with pellet-forming components in an amount of 1 to 10 weight percent.Type: GrantFiled: August 16, 1996Date of Patent: December 2, 1997Assignee: The United States of America as represented by the Department of EnergyInventor: James A. Poston