Patents Assigned to Chemet Corporation
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Patent number: 11919191Abstract: Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising a solution prepared from at least: (i) one or more of a copper amine complex or copper ammine complex, such as copper tetraamine carbonate, (ii) one or more of ammonia or a water-soluble amine and (iii) water; and exposing the cellulosic material provided thereby to carbon dioxide and/or carbonic acid to provide treated cellulosic material, and treated cellulosic materials prepared thereby.Type: GrantFiled: September 26, 2022Date of Patent: March 5, 2024Assignee: American Chemet CorporationInventor: Daniel Brimhall
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Publication number: 20230034800Abstract: Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising a solution prepared from at least: (i) one or more of a copper amine complex or copper ammine complex, such as copper tetraamine carbonate, (ii) one or more of ammonia or a water-soluble amine and (iii) water; and exposing the cellulosic material provided thereby to carbon dioxide and/or carbonic acid to provide treated cellulosic material, and treated cellulosic materials prepared thereby.Type: ApplicationFiled: September 26, 2022Publication date: February 2, 2023Applicant: American Chemet CorporationInventor: Daniel Brimhall
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Patent number: 11453142Abstract: Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising a solution prepared from at least: (i) one or more of a copper amine complex or copper ammine complex, such as copper tetraamine carbonate, (ii) one or more of ammonia or a water-soluble amine and (iii) water; and exposing the cellulosic material provided thereby to carbon dioxide and/or carbonic acid to provide treated cellulosic material, and treated cellulosic materials prepared thereby.Type: GrantFiled: September 28, 2020Date of Patent: September 27, 2022Assignee: American Chemet CorporationInventor: Daniel Brimhall
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Publication number: 20210008755Abstract: Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising a solution prepared from at least: (i) one or more of a copper amine complex or copper ammine complex, such as copper tetraamine carbonate, (ii) one or more of ammonia or a water-soluble amine and (iii) water; and exposing the cellulosic material provided thereby to carbon dioxide and/or carbonic acid to provide treated cellulosic material, and treated cellulosic materials prepared thereby.Type: ApplicationFiled: September 28, 2020Publication date: January 14, 2021Applicant: American Chemet CorporationInventor: Daniel Brimhall
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Patent number: 10786926Abstract: Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising an aqueous alkaline copper-containing solution comprising copper tetraammine carbonate; and exposing the cellulosic material provided thereby to carbon dioxide to provide treated cellulosic material.Type: GrantFiled: October 17, 2019Date of Patent: September 29, 2020Assignee: American Chemet CorporationInventor: Daniel Brimhall
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Publication number: 20200047370Abstract: Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising a solution prepared from at least: (i) one or more of a copper amine complex or copper amine complex, such as copper tetraamine carbonate, (ii) one or more of ammonia or a water-soluble amine and (iii) water; and exposing the cellulosic material provided thereby to carbon dioxide and/or carbonic acid to provide treated cellulosic material, and treated cellulosic materials prepared thereby.Type: ApplicationFiled: October 17, 2019Publication date: February 13, 2020Applicant: American Chemet CorporationInventor: Daniel Brimhall
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Patent number: 10449691Abstract: Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising a solution prepared from at least: (i) one or more of a copper amine complex or copper ammine complex, such as copper tetraamine carbonate, (ii) one or more of ammonia or a water-soluble amine and (iii) water; and exposing the cellulosic material provided thereby to carbon dioxide and/or carbonic acid to provide treated cellulosic material, and treated cellulosic materials prepared thereby.Type: GrantFiled: June 2, 2017Date of Patent: October 22, 2019Assignee: American Chemet CorporationInventor: Daniel Brimhall
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Publication number: 20170266838Abstract: Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising a solution prepared from at least: (i) one or more of a copper amine complex or copper ammine complex, such as copper tetraamine carbonate, (ii) one or more of ammonia or a water-soluble amine and (iii) water; and exposing the cellulosic material provided thereby to carbon dioxide and/or carbonic acid to provide treated cellulosic material, and treated cellulosic materials prepared thereby.Type: ApplicationFiled: June 2, 2017Publication date: September 21, 2017Applicant: American Chemet CorporationInventor: Daniel Brimhall
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Patent number: 5963772Abstract: Electrical contact material made from intimate mixtures of silver powder and a powder of a second phase material is shown in which the powder of the second phase material is milled to produce a selected grain distribution of approximately 90% less than 7-10 microns, approximately 50% between 2 and 5 microns and approximately 10% less than 0.8 to 1.0 microns. The powder of the second phase material is added to a silver salt solution, ammonium hydroxide and hydrazine hydrate to form a precipitate of second phase material particles covered with silver. For applications in which the particles need to be free flowing the particles are compacted together without any binder, broken into chunks and milled to provide granules. In one embodiment homogeneously doped tin oxide particles are disclosed in which tin oxide and the oxide of the dopant are dissolved in nitric acid to produce finely dispersed tin oxide and dopant oxide. The oxides are calcined and ground to the selected grain size distribution.Type: GrantFiled: December 3, 1998Date of Patent: October 5, 1999Assignee: Chemet CorporationInventors: Ernest M. Jost, Kirk McNeilly
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Patent number: 5846288Abstract: Electrical contact material made from intimate mixtures of silver powder and a powder of a second phase material is shown in which the powder of the second phase material is milled to produce a selected grain distribution of approximately 90% less than 7-10 microns, approximately 50% between 2 and 5 microns and approximately 10% less than 0.8 to 1.0 microns. The powder of the second phase material is added to a silver salt solution, ammonium hydroxide and hydrazine hydrate to form a precipitate of second phase material particles covered with silver. For applications in which the particles need to be free flowing the particles are compacted together without any binder, broken into chunks and milled to provide granules. In one embodiment homogeneously doped tin oxide particles are disclosed in which tin oxide and the oxide of the dopant are dissolved in nitric acid to produce finely dispersed tin oxide and dopant oxide. The oxides are calcined and ground to the selected grain size distribution.Type: GrantFiled: November 26, 1996Date of Patent: December 8, 1998Assignee: Chemet CorporationInventors: Ernest M. Jost, Kirk McNeilly
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Patent number: 5707438Abstract: A composite cuprous oxide powder is provided comprising at least about 80% by weight of cuprous oxide particles and substantially the balance cupric oxide adhering to cuprous oxide particles. The composite cuprous oxide powder is produced by surface oxidizing cuprous oxide particles to form a black coating or layer thereon. The composite powder is produced by subjecting particles of cuprous oxide to surface oxidation at a temperature ranging from about 400.degree. F. to less than about 900.degree. F. for a time period sufficient to surface oxidize the particles of cuprous oxide and produce a black coating thereon of cupric oxide. The method is applicable to the production of black pigment grade cuprous oxide powder.Type: GrantFiled: February 21, 1996Date of Patent: January 13, 1998Assignee: American Chemet CorporationInventor: John N. Carlton
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Patent number: 5433893Abstract: An conductive composition includes noble metal (e,g,, gold) powder and/or flake at least partially coated with a thiol lubricant, A binder may be included to form a liquid or paste. The conductive composition may be made by milling a noble metal powder (e.g., gold) in the presence of a thiol lubricant.Type: GrantFiled: February 3, 1993Date of Patent: July 18, 1995Assignee: Chemet CorporationInventors: Ernest M. Jost, Kirk McNeilly, Jay Gruskin
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Patent number: 4700475Abstract: Electrical contacts of silver-cadmium alloy or other silver alloys suitable for I/O in which the cadmium is oxidized adjacent one side only are made providing a tube of silver-cadmium alloy, coating the inner wall with a layer of parting compound or inserting in the tube a sheet separator coated on each face with a layer of parting compound, compressing the tube to flatten it, heating the flattened tube in an oxygen-containing atmosphere to oxidize the cadmium content adjacent the outer face of the tube and to leave it unoxidized the cadmium content adjacent the inner face, and removing the layer of parting compound and cutting the wall of the flattened tube into individual contacts.Type: GrantFiled: February 28, 1986Date of Patent: October 20, 1987Assignee: Chemet CorporationInventors: Ernest M. Jost, Timo J. Santala
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Patent number: 4509980Abstract: Electrical contacts of high density and high erosion resistance made by sintering a powder compact containing silver, cadmium oxide, cupric nitrate, or any other water soluble copper salt, and optionally silver oxide or silver oxide and barium hydroxide.Type: GrantFiled: May 19, 1983Date of Patent: April 9, 1985Assignee: Chemet CorporationInventor: Ernest M. Jost
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Patent number: 4456474Abstract: Silver powder of high purity having a particle size within the range from 0.6 to 2.5 micrometers in diameter is made by providing a reaction mixture comprising a solution of hydrazine in deionized water containing excess ammonium hydroxide, spraying into the reaction mixture a solution of silver nitrate in deionized water, and adjusting concentrations and ratios of ingredients within limits to obtain a selected particle size within the range.Type: GrantFiled: May 5, 1983Date of Patent: June 26, 1984Assignee: Chemet CorporationInventor: Ernest M. Jost
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Patent number: 4456473Abstract: Silver powder of high purity having a particle size from 3 to 5 micrometers in diameter is made by providing a solution of silver nitrate in deionized water containing excess ammonium hydroxide, spraying into the solution while stirring it an aqueous solution of hydrazine in deionized water in an amount in excess of that theoretically required to reduce the silver nitrate to silver metal.Type: GrantFiled: May 5, 1983Date of Patent: June 26, 1984Assignee: Chemet CorporationInventor: Ernest M. Jost