Patents by Inventor Martin R. Kasprzyk
Martin R. Kasprzyk 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: 6484795Abstract: An integral ceramic insert for a radiant tube. The insert has a helical shape and contains ceramic material; and it has a thermal expansion rate of less than 6.0×10−6 meters/meter/degree Celsius and a thermal conductivity of at least 0.2 calories/centimeter/second/degree Celsius. The diameter of the insert is from about 2 to about 10 inches, and it has a length such that the ratio of its length to its diameter is from about 2/1 to about 8/1. The helical shape of the insert contains one or more pitches of from about 2 to about 32 inches, each which defines a helix angle of from about 15 to about 80 degrees.Type: GrantFiled: September 8, 2000Date of Patent: November 26, 2002Inventor: Martin R. Kasprzyk
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Publication number: 20010024733Abstract: An insert for a radiant tube comprised of an oxidation resistant metal alloy or a refractory material.Type: ApplicationFiled: February 2, 2001Publication date: September 27, 2001Inventor: Martin R. Kasprzyk
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Patent number: 5985186Abstract: A method of making a ceramic tube of silicon and silicon carbide comprising the steps of covering a mandrel with carbon fiber material; infiltrating the carbon fiber material with a thermoset resin; curing the resin to render the carbon fiber material rigid and produce a green body; removing the mandrel to produce a free-standing body; treating the free standing body with graphite to fill voids and render the green body gas tight and infiltrating the green body with molten silicon to form a silicon and silicon carbide ceramic tube.Type: GrantFiled: February 19, 1998Date of Patent: November 16, 1999Assignee: Gas Research InstituteInventors: Martin R. Kasprzyk, Michael P. Dunn
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Patent number: 5655599Abstract: An improved radiant heat transfer tube with internal fins is provided. Optimum design characteristics for the number of fins, the height or length of the fins and the twist of the fins is provided to enhance convective and radiant heat transfer from combustion gases inside the tube to the inside surface of the tube. The fin design applies to tubes fabricated from high temperature metal alloys, monolithic ceramics, metal matrix composites or ceramic matrix composites.Type: GrantFiled: June 21, 1995Date of Patent: August 12, 1997Assignee: Gas Research InstituteInventor: Martin R. Kasprzyk
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Patent number: 5135895Abstract: A high temperature, preferably polycrystalline, ceramic fiber having a selectable diameter of between 1 and 200 microns. The fiber is stable in an inert atmosphere at a temperature above about 1700.degree. C. and is often stable even in air at a temperature above 1500.degree. C. The fiber comprises a sintered ceramic powder having a maximum particle size less than the diameter of the fiber and an average particle size less than 0.2 times the diameter of the fiber. The ceramic powder is also stable in an inert atmosphere at a temperature above about 1700.degree. C. At least 90% of the ceramic is selected from borides, nitrides, carbides, and silicides. The fiber is characterized by a smooth surface and is preferably out of round.The invention further comprises a textilable sinterable filament, comprising a flexible polymer matrix containing high temperature sinterable ceramic powder particles. The ceramic powder particles are selected from ceramic borides, nitrides, carbides, and silicides.Type: GrantFiled: January 23, 1991Date of Patent: August 4, 1992Assignee: The Standard Oil CompanyInventors: Francis J. Frechette, Wolfgang D. G. Boecker, Carl H. McMurtry, Martin R. Kasprzyk
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Patent number: 5125822Abstract: The present invention relates to apparatus for producing tubular ceramic articles. The apparatus is comprised of a vertically positioned electrical induction furnace; a plurality of spaced concentrically arranged tubular forms, which fit and are arranged vertically within the furnace; one or more supply hoppers for holding particulate feed materials, and; supply lines to dry cast feed materials into the spaces between and around the forms. The forms may then be removed leaving separate vertical, hollow columns of particulate feed materials concentrically arranged within the furnace. The furnace is then heated causing the particulate materials to react forming a tubular ceramic article within the furnace.Type: GrantFiled: April 8, 1991Date of Patent: June 30, 1992Assignee: Gas Research InstituteInventor: Martin R. Kasprzyk
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Patent number: 5071685Abstract: The present invention relates to composite articles of manufacture comprised of a continuous phase of silicon containing a discontinuous matrix of particulate material selected from silicon carbide, carbon, or mixtures thereof. The particulate materials have a minimum size of about fifty microns, and more preferably for enhanced performance, a minimum size of 100 microns. The present articles contain from about thirty to about seventy, and more preferably from about 35 to about 65 percent by volume of silicon. The present composites have strains to failure at high temperatures substantially higher than the reaction bonded silicon carbide composites of the prior art. The present composites also have a resistance to thermal stress at elevated temperatures superior to the prior art composites. In such respects, the present composite materials have characteristics more resembling a metal than a ceramic.Type: GrantFiled: January 23, 1990Date of Patent: December 10, 1991Inventor: Martin R. Kasprzyk
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Patent number: 4908340Abstract: A high temperature, preferably polycrystalline, ceramic fiber having a selectable diameter of between 1 and 200 microns. The fiber is stable in an inert atmosphere at a temperature above about 1700.degree. C. and is often stable even in air at a temperature above 1500.degree. C. The fiber comprises a sintered ceramic powder having a maximum particle size less than the diameter of the fiber and an average particle size less than 0.2 times the diameter of the fiber. The ceramic powder is also stable in an inert atmosphere at a temperature above about 1700.degree. C. At least 90% of the ceramic is selected from borides, nitrides, carbides, and silicides. The fiber is characterized by a smooth surface and is preferably out of round.The invention further comprises a textilable sinterable filament, comprising a flexible polymer matrix containing high temperature sinterable ceramic powder particles. The ceramic powder particles are selected from ceramic borides, nitrides, carbides, and silicides.Type: GrantFiled: July 16, 1987Date of Patent: March 13, 1990Assignee: The Standard Oil CompanyInventors: Francis J. Frechette, Wolfgang D. G. Boecker, Carl H. McMurtry, Martin R. Kasprzyk
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Patent number: 4795673Abstract: Dense, strong, composite materials are produced from mixtures of silicon and silicon carbide. The composite materials are characterized by a mixture of finely-divided silicon carbide in a substantially continuous matrix of silicon. The composite materials contain from about 40 to about 60 percent by volume silicon carbide and from about 60 to about 40 percent by volume silicon. The composite materials are produced by initially producing a finely-divided silicon carbide starting component and forming the component into a green body of the desired shape. The green body is subsequently impregnated with molten silicon in the absence of any substantial amount of carbon. Suitably, a thermoplastic resin binder may be added to the silicon carbide starting material to aid in forming the green body. The impregnation step may be carried out by surrounding the green body with finely-divided silicon metal and heating the covered body to a temperature above the melting point of silicon.Type: GrantFiled: October 28, 1986Date of Patent: January 3, 1989Assignee: Stemcor CorporationInventors: Francis J. Frechette, Martin R. Kasprzyk, Douglas J. McDowell, Joseph S. Zanghi
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Patent number: 4789506Abstract: The present invention relates to methods and apparatus for producing tubular articles of silicon carbide and silicon. The articles contain silicon in both metallic and in chemically combined form. The method consists of the steps of concentrically positioning a vertical tubular columns of particulate silicon contiguous to a hollow, vertical tubular columns of particulate silicon carbide, carbon, or mixtures of silicon and carbon, and heating the adjacent columns to a siliciding temperature. The silicon component infiltrates the column containing the particulate silicon carbide, carbon, or mixtures thereof, forming a tubular product. The apparatus consists of supply hoppers for holding the particulate feed material, a loading means comprised of spaced, concentrically arranged, tubular forms. The loading means is positioned within a vertically positioned electrical induction furnace. Particulate feed materials are dry cast in the spaces between and around the forms.Type: GrantFiled: November 7, 1986Date of Patent: December 6, 1988Assignee: Gas Research InstituteInventor: Martin R. Kasprzyk
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Patent number: 4559244Abstract: Non-oxide refractory foams, possessing controlled permeability and uniformity, are prepared by impregnating an organic polymer foam material with a fluid, particulate slurry of a first refractory material, drying, applying to the dried, impregnated material a second refractory material which has a lower melting point than the first refractory material and thereafter heating, at a temperature sufficient to cause melt infiltration of the second refractory material into the impregnated material, thus producing inert and dimensionally stable composite refractory foams having broad utility as particulate filters or carriers.Type: GrantFiled: November 19, 1984Date of Patent: December 17, 1985Assignee: Kennecott CorporationInventors: Martin R. Kasprzyk, Monika O. TenEyck
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Patent number: 4526826Abstract: New porous semiconductor dopant carriers are disclosed together with a method for the diffusion doping of semiconductors by the vapor phase transport of an n or p type dopant, such as phosphorus, arsenic, antimony, boron gallium, aluminum, zinc, silicon, tellurium, tin and cadmium to the semiconductor host substrate; wherein the dopant carrier is comprised of a rigid, multiphase dimensionally stable refractory foam, formed through the impregnation, and subsequent thermal destruction of an open-celled organic polymer foam.Type: GrantFiled: June 8, 1983Date of Patent: July 2, 1985Assignee: Kennecott CorporationInventors: Monika O. Ten Eyck, Martin R. Kasprzyk, Richard E. Tressler
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Patent number: 4228344Abstract: A composition comprising negatively doped hot pressed particulate silicon carbide, the process for making the composition, an electrical hot surface fuel ignitor manufactured from the composition, a silicon brazed electrical connection for the ignitor and an ignitor circuit containing a dropping resistance.Type: GrantFiled: June 29, 1978Date of Patent: October 14, 1980Assignee: The Carborundum CompanyInventors: Charles J. Boos, Elwood B. Hausler, James A. Hirsch, Martin R. Kasprzyk, Elmer G. Smith
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Patent number: 4205363Abstract: A composition comprising negatively doped hot pressed particulate silicon carbide, the process for making the composition, an electrical hot surface fuel ignitor manufactured from the composition, a silicon brazed electrical connection for the ignitor and an ignitor circuit containing a dropping resistance.Type: GrantFiled: June 29, 1978Date of Patent: May 27, 1980Assignee: The Carborundum CompanyInventors: Charles J. Boos, Elwood B. Hausler, James A. Hirsch, Martin R. Kasprzyk, Elmer G. Smith