Patents by Inventor Carl D. Keith
Carl D. Keith has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4752792Abstract: The present invention would provide a support for a camera, including a base portion for attaching the camera thereto, the base portion having upright vertically deposed handle member which would be positioned adjacent the wall of the camera, the vertical member shaped in such a manner so as to conform to a hand grip, with a strap extending over ones hand from the top of the vertical member to the corner of the base portion. The base portion would include a padded mounting area, an owner I.D. plate, and a primary storage area having a gasket sealed rearwardly hinged door, so that the storage area may provide space for additional rolls of film, filters, lens cap, or the like materials. There would be included secondary storage areas for the storage of a felt tip pen marker, lens cleaning fluid, and yet an additional secondary storage area containing a spare camera battery. In addition, there may be included a film indicator window, and a storage area for a lens cleaning cloth.Type: GrantFiled: November 26, 1986Date of Patent: June 21, 1988Inventor: Carl D. Keith
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Patent number: 4552733Abstract: This invention provides polyfunctional catalysts comprising a composite of platinum and one or more of rhodium, ruthenium and iridium, a substantially larger quantity of one or more base metal oxides in which the metal is selected from the group consisting of metals having an atomic number from 25 to 28 and rhenium, and an alumina support, which composite is made and then deposited on a suitable carrier. In a preferred embodiment, the catalysts contain 1-20 weight percent of said base metal oxide, typically nickel oxide; 0.05-0.5 weight percent platinum; and 0.002-0.3 weight percent rhodium, and an alumina support deposited on a monolith or other carrier. The improved catalysts are especially applicable for purifying exhaust gases from combustion processes, and in particular those from internal combustion engines.Type: GrantFiled: December 18, 1984Date of Patent: November 12, 1985Assignee: Engelhard CorporationInventors: Charles E. Thompson, John J. Mooney, Carl D. Keith, William A. Mannion
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Patent number: 4206087Abstract: Macrosized catalysts suitable for promoting chemical reactions, especially to reduce pollutants in waste gas streams such as automobile exhaust, are described. The catalysts have one or more metal components, especially a platinum group metal component, as a catalytic promoter combined with a high surface area, refractory oxide support. Alumina is added to the macrosize catalyst to provide protection against poisoning by extraneous materials such as lead, zinc, other metals, sulfur or phosphorus with which the catalysts may come in contact during use. These catalysts may have a relatively catalytically-inactive carrier, especially a monolithic carrier which may be of the honeycomb type.Type: GrantFiled: January 6, 1977Date of Patent: June 3, 1980Assignee: Engelhard Minerals & Chemicals CorporationInventors: Carl D. Keith, John J. Mooney, Robert E. Kenson, Daniel L. Bair
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Patent number: 4202301Abstract: An air-to-fuel ratio control mechanism in an internal combustion engine operates in partial response to the output of a control circuit, which circuit in turn is responsive to the output of an oxygen sensor mounted in the exhaust of the engine. The control circuit biases the control mechanism toward a predetermined desired air-to-fuel ratio, normally at or near stoichiometric. When the sensor output deviates above a first predetermined value or below a second predetermined value for longer than a predetermined time period, a comparator circuit provides a disabling signal which disconnects the control circuit from the air-to-fuel ratio control mechanism. At the same time, the disabling signal connects a predetermined signal to the air-to-fuel ratio control mechanism. This predetermined signal simulates a nominal control circuit output to maintain the air-to-fuel ratio close to stoichiometric or some other preferred setting such as a air/fuel ratio which is lean.Type: GrantFiled: August 31, 1977Date of Patent: May 13, 1980Assignee: Engelhard Minerals & Chemicals CorporationInventors: Jack Early, John J. Mooney, Carl D. Keith
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Patent number: 4189404Abstract: Macrosized catalysts suitable for promoting chemical reactions, especially to reduce pollutants in waste gas streams such as automobile exhaust, are described. The catalysts have one or more metal components, especially a platinum group metal component, as a catalytic promoter combined with a high surface area, refractory oxide support on a relatively catalytically-inactive carrier, especially a monolithic carrier which may be of the honeycomb type. An aqueous solution of an alumina precursor is added to the macrosize catalyst to provide protection against poisoning by extraneous materials such as lead, zinc, other metals, sulfur or phosphorus with which the catalysts may come in contact during use.Type: GrantFiled: January 6, 1977Date of Patent: February 19, 1980Assignee: Engelhard Minerals & Chemicals CorporationInventors: Carl D. Keith, John J. Mooney, Robert E. Kenson, Daniel L. Bair
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Patent number: 4171288Abstract: Catalysts are disclosed which have good activity and life when used to promote the conversion of hydrocarbons, carbon monoxide and nitrogen oxides contained in small concentrations in gaseous streams, to obtain the less noxious materials, carbon dioxide, water and nitrogen. The catalysts contain a catalytically promoting, platinum group metal component, a catalytically promoting, base metal component and an alumina support component, deposited on a high surface area, particulate, macrosize carrier. The base metal component contains a metal selected from the group consisting of metals having an atomic number from 25 to 28 and rhenium.Type: GrantFiled: September 23, 1977Date of Patent: October 16, 1979Assignee: Engelhard Minerals & Chemicals CorporationInventors: Carl D. Keith, William R. Larsen, Thomas Shimrock
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Patent number: 4171287Abstract: Catalysts are disclosed which have good activity and life when used to promote the conversion of hydrocarbons, carbon monoxide and nitrogen oxides contained in small concentrations in gaseous streams, to obtain the less noxious materials, carbon dioxide, water and nitrogen. The catalysts contain a catalytically-promoting, platinum group metal component, a catalytically-promoting, base metal component added as a solid material, and an alumina support component, deposited on a macrosize carrier. The base metal component contains a metal selected from the group consisting of metals having an atomic number from 25 to 28 and rhenium. The base metal and alumina components are preferably composited before deposition on the macrosize carrier, and the composite may also contain the platinum group metal component before such deposition. The catalytically-promoting metal components and alumina support can be comminuted as a slurry, and the liquid medium of the slurry is preferably acidic.Type: GrantFiled: September 23, 1977Date of Patent: October 16, 1979Assignee: Engelhard Minerals & Chemicals CorporationInventor: Carl D. Keith
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Patent number: 4157316Abstract: This invention provides polyfunctional catalysts comprising a composite of platinum and one or more of rhodium, ruthenium and iridium, a substantially larger quantity of one or more base metal oxides in which the metal is selected from the group consisting of metals having an atomic number from 25 to 28 and rhenium, and an alumina support, which composite is made and then deposited on a suitable carrier. In a preferred embodiment, the catalysts contain 1-20 weight percent of said base metal oxide, typically nickel oxide; 0.05-0.5 weight percent platinum; and 0.002-0.3 weight percent rhodium, and an alumina support deposited on a monolith or other carrier. The improved catalysts are especially applicable for purifying exhaust gases from combustion processes, and in particular those from internal combustion engines.Type: GrantFiled: September 16, 1977Date of Patent: June 5, 1979Assignee: Engelhard Minerals & Chemicals CorporationInventors: Charles E. Thompson, John J. Mooney, Carl D. Keith, William A. Mannion
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Patent number: 3997618Abstract: There is disclosed a process for isomerizing alkylated benzenes having from 3-10 carbon atoms and methyl or ethyl alkyl substituents. The reaction is conducted in the presence of molecular hydrogen and a catalyst having a platinum group metal, especially platinum, and rhenium promoters on a porous, solid oxide, acidic support. The support can be a mixture of a low acidic material such as alumina, and a higher acidic material such as silica-alumina or crystalline aluminosilicate. The catalyst promoters are preferably supported on the low acidity base component.Type: GrantFiled: May 23, 1975Date of Patent: December 14, 1976Assignee: Engelhard Minerals & Chemicals CorporationInventors: Kurt W. Cornely, Saul G. Hindin, Carl D. Keith