Patents by Inventor Dale R. Wexell
Dale R. Wexell 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: 6699429Abstract: A process for forming a silicon nitride-bonded silicon carbide honeycomb monolith by a) forming a plasticizable mixture which includes (1) about 60% to 85% by weight, powdered silicon carbide with a median particle size of about 10-40 micrometers; (2) about 15% to 40% by weight, powdered silicon metal with a median particle size of about 5-20 micrometers; and, (3) organic components; b) extruding the plasticizable mixture to form a green honeycomb monolith; c) drying the green honeycomb monolith; and, d) heating the honeycomb monolith to 1450° C. with a hold of 1 hour in an atmosphere of argon; and, e) nitriding the honeycomb monolith between 1450° C. to 1600° C. for a time sufficient to obtain a silicon nitride-bonded silicon carbide body.Type: GrantFiled: August 1, 2002Date of Patent: March 2, 2004Assignee: Corning IncorporatedInventors: Yanxia Lu, Dale R. Wexell, Elizabeth M. Wheeler
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Publication number: 20030057581Abstract: A process for forming a silicon nitride-bonded silicon carbide honeycomb monolith by a) forming a plasticizable mixture which includes (1) about 60% to 85% by weight, powdered silicon carbide with a median particle size of about 10-40 micrometers; (2) about 15% to 40% by weight, powdered silicon metal with a median particle size of about 5-20 micrometers; and, (3) organic components; b) extruding the plasticizable mixture to form a green honeycomb monolith; c) drying the green honeycomb monolith; and, d) heating the honeycomb monolith to 1450° C. with a hold of 1 hour in an atmosphere of argon; and, e) nitriding the honeycomb monolith between 1450° C. to 1600° C. for a time sufficient to obtain a silicon nitride-bonded silicon carbide body.Type: ApplicationFiled: August 1, 2002Publication date: March 27, 2003Inventors: Yanxia Lu, Dale R. Wexell, Elizabeth M. Wheeler
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Patent number: 6328779Abstract: A filter for trapping and combusting diesel exhaust particulates and method of making the same. The filter comprises a monolithic substrate coated with a refractory oxide material which at a frequency of 2.45 GHz heats up said filter from room temperature to about 600° C. in 5 minutes or less, and wherein said refractory oxide material has a loss tangent which decreases with increasing temperature such that an equilibrium in said filter temperature is reached at no greater than 1100° C.Type: GrantFiled: May 31, 2000Date of Patent: December 11, 2001Assignee: Corning IncorporatedInventors: Lin He, Gregory A. Merkel, Cameron W. Tanner, Dale R. Wexell
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Patent number: 6322605Abstract: A filter for trapping and combusting diesel exhaust particulates comprising a microwave-absorbing filter body formed from a ceramic material having a general formula selected from the group consisting of A1−xMxB1−yM′yO3−&agr;, where A and M are selected from the group consisting of Na, K, Rb, Ag, Ca, Sr, Ba, Pb, La, Pr, Nd, Bi, Ce, Th and combinations thereof; where B and M′ are selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Rh, Ru, Pt, Zn, Nb, Ta, Mo, W and combinations thereof; wherein, the chemical formula is electrostatically balanced; (A′aRrM″m)(Z)4(X)6O24, where A′ is from Group IA metals; where R is selected from Group IIA metals; where M″ is selected from the group consisting of Mn, Co, Cu, Zn, Y, lanthanides and combinations thereof; where Z is selected from the group consisting of Zr, Hf, Ti, Nb, Ta, Y, lanthanides, Sn, Fe, Co, Al, Mn, Zn, Ni, and combinations thereof; where X is selected from the group consisting of P, Si, As,Type: GrantFiled: May 31, 2000Date of Patent: November 27, 2001Assignee: Corning IncorporatedInventors: Lin He, Gregory A. Merkel, Cameron W. Tanner, Dale R. Wexell
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Patent number: 6010543Abstract: A battery construction and a method of producing the construction. The construction comprises a ceramic separator having a honeycomb structure in which cells run lengthwise of the honeycomb and are separated by porous walls, and internal positive and negative electrodes positioned in part at least within the honeycomb structure.Type: GrantFiled: January 21, 1998Date of Patent: January 4, 2000Assignee: Corning IncorporatedInventors: George E. Berkey, John L. Stempin, Ronald L. Stewart, Dale R. Wexell
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Patent number: 5916706Abstract: A battery construction and a method of producing the construction. The construction comprises a ceramic separator having a honeycomb structure in which cells run lengthwise of the honeycomb and are separated by porous walls, and internal positive and negative electrodes positioned in part at least within the honeycomb structure.Type: GrantFiled: September 30, 1996Date of Patent: June 29, 1999Assignee: Corning IncorporatedInventors: George E. Berkey, John L. Stempin, Ronald L. Stewart, Dale R. Wexell
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Patent number: 5738955Abstract: A tubular, rigid, porous, ceramic separator for a rechargeable, deep-discharge battery assembly, the separator having a porosity greater than 40%. A plurality of battery cells, each embodying such separators, are assembled with a common terminal to form the positive electrode in a motive traction battery.Type: GrantFiled: July 11, 1996Date of Patent: April 14, 1998Assignee: Corning IncorporatedInventors: Thomas N. Gardner, Alvin J. Salkind, John L. Stempin, Dale R. Wexell
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Patent number: 5728331Abstract: A battery assembly comprising a separator, spaced metal/metal oxide electrodes and a liquid electrolyte, the improvement comprising a rigid, porous, ceramic separator that is wettable by the liquid electrolyte, that has a porosity of 40-90 volume %, an average pore size in the range of 0.1-25 microns, a thickness of 1-12 mm, and a weight loss of not more than about 5% when exposed to H.sub.2 SO.sub.4 having a specific gravity of 1.28 for 72 hours at 70.degree. C.Type: GrantFiled: February 9, 1996Date of Patent: March 17, 1998Assignee: Corning IncorporatedInventors: John L. Stempin, Ronald L. Stewart, Dale R. Wexell
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Patent number: 5616160Abstract: The invention relates to a process of eliminating high chloride-containing incinerator ash and incinerator ash-residue mixtures, without generating excessive heavy metal-containing effluents during the actual vitrification of the ash. The process involves first pretreating the incinerator ash or ash-residue mixture, if needed, whereby the resultant ash contains less than about 3% halogen by weight and less than about 3% C.. Following the pretreatment, the ash is dried and then mixed with any additives needed to make up a vitrifiable batch mixture which will, when subsequently vitrified, form a glass possessing an excellent acid durability. A durability whereby such that the weight loss of the glass in 5% HCl solution at 95.degree. C. is 2.0 mg/cm.sup.2 or less in 24 hours. This durability results in minimal or non-detectable leaching of hazardous heavy metal or non-metallic specie and is sufficient enough durability such that the vitrified glass will easily pass the EPA's test for leachability.Type: GrantFiled: January 27, 1995Date of Patent: April 1, 1997Assignee: Corning IncorporatedInventors: M. Grayson Alexander, John L. Stempin, Dale R. Wexell
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Patent number: 5591683Abstract: This invention is directed to the production of spontaneous essentially non-crystalline opal glasses exhibiting a very dense, milky-white appearance and excellent resistance to weathering and attack by alkaline detergents consisting essentially, expressed in weight percent on the on the basis, of 1.9-3.6% K.sub.2 O, 4.2-7.3% Na.sub.2 O, 0.2-3% Li.sub.2 O, 0-1.2% MgO, 0-4.9% CaO, 0-12.5% BaO, 0-0.1% NiO, 0.4-4% ZnO, 5.3-9.6% B.sub.2 O.sub.3, 8.8-13.5% Al.sub.2 O.sub.3, 57.2-64.4% SiO.sub.2, and 1.0-2.2% F., where the sum of (MgO+CaO+BaO) is preferably in the range of 4.5-12.5%.Type: GrantFiled: November 28, 1995Date of Patent: January 7, 1997Assignee: Corning IncorporatedInventors: John L. Stempin, Dale R. Wexell
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Patent number: 5554464Abstract: An elongated, rigid, porous, ceramic separator for a rechargeable battery assembly, the separator having a honeycomb structure in which open cells are separated from adjacent cells by thin, porous, ceramic walls, the open cells and separating walls running lengthwise of the honeycomb, the cell walls being porous and the open cells and wall pores being adapted to be filled with an electrolyte to permit ion flow between electrodes in a battery.Type: GrantFiled: July 26, 1995Date of Patent: September 10, 1996Assignee: Corning IncorporatedInventors: John L. Stempin, Ronald L. Stewart, Dale R. Wexell
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Patent number: 5514494Abstract: A battery assembly comprising a separator, spaced metal/metal oxide electrodes and a liquid electrolyte, the improvement comprising a rigid, porous, ceramic separator that is wettable by the liquid electrolyte, that has a porosity of 40-90 volume %, an average pore size in the range of 0.1-25 microns, a thickness of 1-12 mm, and a weight loss of not more than about 5% when exposed to H.sub.2 SO.sub.4 having a specific gravity of 1.28 for 72 hours at 70.degree.C.Type: GrantFiled: June 19, 1995Date of Patent: May 7, 1996Assignee: Corning IncorporatedInventors: John L. Stempin, Ronald L. Stewart, Dale R. Wexell
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Patent number: 5427986Abstract: Inorganic reinforcing fibers comprising hybrid BN--C protective coatings containing up to 12% by weight of hexagonal (graphitic) carbon dissolved in the BN matrix but being essentially free of undissolved pyrolytic and graphitic carbon secondary phases, and fiber-reinforced ceramic matrix composite products incorporating the protectively-coated fibers, are disclosed. The fibers resist oxidation and provide good bonding interface characteristics when disposed in ceramic encapsulating materials, such that the composite products exhibit excellent resistance to high temperature embrittlement.Type: GrantFiled: October 16, 1989Date of Patent: June 27, 1995Assignee: Corning IncorporatedInventors: Kenneth Chyung, John L. Stempin, Dale R. Wexell
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Patent number: 5422319Abstract: Novel oxide coatings which can be conveniently applied to reinforcing fibers such as silicon carbide fibers, and which when introduced as a fiber coating into fiber reinforced ceramic matrix composites provide composites exhibiting improved resistance to embrittlement at high temperatures, are described. Oxides effective to provide the improved composites in accordance with the invention include CeO.sub.2 and ZrO.sub.2.Type: GrantFiled: September 9, 1988Date of Patent: June 6, 1995Assignee: Corning IncorporatedInventors: John L. Stempin, Dale R. Wexell
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Patent number: 5418194Abstract: Inorganic reinforcing fibers provided with a multi-layer protective coating comprising a boron nitride sublayer and an oxide-based overcoating of alumina or synthetic mica, and fiber-reinforced ceramic matrix composite products incorporating the protectively-coated fibers, are disclosed. The fibers offer improved oxidation resistance and good compatibility with oxide-based glass and glass-ceramic composite matrix materials.Type: GrantFiled: April 23, 1993Date of Patent: May 23, 1995Assignee: Corning IncorporatedInventors: Steven B. Dawes, John L. Stempin, Dale R. Wexell
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Patent number: 5198302Abstract: Silicon nitride reinforcing fibers provided with a protective surface coating comprising a boron nitride base layer and, optionally, an alumina overcoating, and fiber-reinforced ceramic matrix composite products incorporating the protectively-coated fibers, are disclosed. The composites offer significantly improved high temperature strength in combination with low dielectric constant and low dielectric loss characteristics.Type: GrantFiled: April 23, 1990Date of Patent: March 30, 1993Assignee: Corning IncorporatedInventors: Kenneth Chyung, Steven B. Dawes, Dale R. Wexell
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Patent number: 5194303Abstract: This invention relates to a method for eliminating the grayish discoloration which commonly develops when lead-free and cadmium-free glass frits are applied to substrates utilizing an organic medium and thereafter fired to fuse the frit particles into a glaze. The grayish discoloration contains a carbonaceous residue from the organic medium. The method comprises the four general steps:(1) adsorbing a coating of a strongly oxidizing metal ion species onto the surface of the frit particles;(2) mixing the coated frit particles with an organic medium;(3) applying that mixture to a substrate; and(4) firing the mixture to eliminate the organic medium and to oxidize the carbonaceous residue while fusing the frit particles into a glaze.Type: GrantFiled: July 1, 1991Date of Patent: March 16, 1993Assignee: Corning IncorporatedInventors: Jaroslava M. Nigrin, Kathleen A. Wexell, Dale R. Wexell
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Patent number: 5164341Abstract: Fiber-reinforced ceramic matrix composite products comprising boron-nitride-coated reinforcing silicon carbide fibers disposed in a substantially non-porous alkaline earth aluminosilicate glass-ceramic matrix are disclosed, the matrix comprising triclinic anorthite (CaO,SrO.Al.sub.2 O.sub.3.2SiO.sub.2) as the principal crystal phase and the products exhibiting unexpectedly good resistance to high-temperature degradation.Type: GrantFiled: November 3, 1988Date of Patent: November 17, 1992Assignee: Corning IncorporatedInventors: Kenneth Chyung, John L. Stempin, Dale R. Wexell
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Patent number: 5153152Abstract: A fiber-reinforced ceramic matrix composite article comprising fiber-reinforced surface portions disposed on a ceramic core, the core differing in composition and high temperature properties from the surface portions and the fibers present in the surface portions being of a type normally subject to oxidative deterioration at high temperature, wherein the fibers in the surface portion are provided with protection from high temperature oxidative deterioration such that excellent strength and resistance to high temperature embrittlement are achieved for the composite as a whole.Type: GrantFiled: October 4, 1991Date of Patent: October 6, 1992Assignee: Corning IncorporatedInventors: Steven B. Dawes, John L. Stempin, Dale R. Wexell
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Patent number: 5132254Abstract: Ceramic matrix composite articles comprising a matrix phase composed of a silicate glass or glass-ceramic and a matrix reinforcement material disposed within the matrix comprising carbon (e.g., graphite) fibers are described, wherein the fibers are provided with a protective boron nitride surface coating. The mechanical properties of the composites at high temperatures are substantially improved.Type: GrantFiled: December 17, 1990Date of Patent: July 21, 1992Assignee: Corning IncorporatedInventors: John L. Stempin, Dale R. Wexell