Patents by Inventor Thomas M. Hartnett
Thomas M. Hartnett 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: 11958785Abstract: A method of bonding includes applying a glass composition to at least a first material surface. The glass composition includes a glass powder and a solvent. The first material surface is disposed onto a second material surface. An elevated temperature is applied to the first material surface and the second material surface to form a bond between the first material surface and the second material surface. The first material surface and the second material surface are compressed under an isostatic pressure.Type: GrantFiled: November 12, 2019Date of Patent: April 16, 2024Assignee: RAYTHEON COMPANYInventors: Stephanie Silberstein Bell, Thomas M. Hartnett, Richard Gentilman, Derrick J. Rockosi, Jeremy Wagner
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Patent number: 11588218Abstract: Methods and apparatus for a frequency selective limiter (FSL) having a magnetic material substrate that tapers in thickness and supports a transmission line that has segments and bends. The segments, which differ in width and are substantially parallel to each other, such that each segment traverses the substrate on a constant thickness of the substrate.Type: GrantFiled: August 11, 2021Date of Patent: February 21, 2023Assignee: Raytheon CompanyInventors: Matthew A. Morton, Gerhard Sollner, Jason D. Adams, Poornima Varadarajan, Evelina Aleksandro Polyzoeva, Thomas M. Hartnett
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Publication number: 20230052113Abstract: Methods and apparatus for a frequency selective limiter (FSL) having a magnetic material substrate that tapers in thickness and supports a transmission line that has segments and bends. The segments, which differ in width and are substantially parallel to each other, such that each segment traverses the substrate on a constant thickness of the substrate.Type: ApplicationFiled: August 11, 2021Publication date: February 16, 2023Applicant: Raytheon CompanyInventors: Matthew A. Morton, Gerhard Sollner, Jason D. Adams, Poornima Varadarajan, Evelina Aleksandro Polyzoeva, Thomas M. Hartnett
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Publication number: 20220259107Abstract: A nanocomposite optical ceramic (NCOC) material. The material having a first solid phase, a second solid phase, and a third solid phase. The first solid phase has first solid phase grains no larger than 5 ?m, and each first solid phase grain has a first solid phase grain boundary. The second solid phase has second solid phase grains no larger than 5 ?m, and each second solid phase grain has a second solid phase grain boundary. The third solid phase has a doping agent. The doping agent is less than 5 atomic % soluble in the first solid phase and the second solid phase. At least part of the third solid phase is situated at the second solid phase grain boundary.Type: ApplicationFiled: January 25, 2022Publication date: August 18, 2022Inventors: Kenneth Smith, Stephanie Silberstein Bell, Christopher S. Nordahl, Thomas M. Hartnett, Richard Gentilman, R. Wesley Jackson
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Patent number: 11279657Abstract: Various embodiments disclosed relate to an optical window including an infrared light transmissive optical material. The optical material includes a first ceramic phase including a first ceramic material and a first dopant distributed therein. The optical material further includes a second ceramic phase homogenously intermixed with the first ceramic phase and comprising a second ceramic material and a second dopant distributed therein. The first dopant increases the refractive index of the first ceramic material and the second dopant decreases the refractive index of the second ceramic material. The first dopant and the second dopant are present in an amount such that a difference in a refractive index of the first ceramic phase and of the second ceramic phase is in a range of from about 0.001 to about 0.2.Type: GrantFiled: June 11, 2020Date of Patent: March 22, 2022Assignee: Raytheon CompanyInventors: Eric K. Riedel, Thomas M. Hartnett
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Publication number: 20210221742Abstract: Various embodiments disclosed relate to an optical window including an infrared light transmissive optical material. The optical material includes a first ceramic phase including a first ceramic material and a first dopant distributed therein. The optical material further includes a second ceramic phase homogenously intermixed with the first ceramic phase and comprising a second ceramic material and a second dopant distributed therein. The first dopant increases the refractive index of the first ceramic material and the second dopant decreases the refractive index of the second ceramic material. The first dopant and the second dopant are present in an amount such that a difference in a refractive index of the first ceramic phase and of the second ceramic phase is in a range of from about 0.001 to about 0.2.Type: ApplicationFiled: June 11, 2020Publication date: July 22, 2021Inventors: Eric K. Riedel, Thomas M. Hartnett
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Publication number: 20210139383Abstract: A method of bonding includes applying a glass composition to at least a first material surface. The glass composition includes a glass powder and a solvent. The first material surface is disposed onto a second material surface. An elevated temperature is applied to the first material surface and the second material surface to form a bond between the first material surface and the second material surface. The first material surface and the second material surface are compressed under an isostatic pressure.Type: ApplicationFiled: November 12, 2019Publication date: May 13, 2021Inventors: Stephanie Silberstein Bell, Thomas M. Hartnett, Richard Gentilman, Derrick J. Rockosi, Jeremy Wagner
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Publication number: 20210139773Abstract: A method of making a scintillator material includes forming a dried ceramic composition into a ceramic body with a garnet crystal formula (Gd3-x-zYx)Cez(Ga5-yAly)O12, where x is about 0 to about 2, y is about 0 to about 5, and z is about 0.001 to about 1.0. The ceramic body is sintered to form a sintered ceramic body. The sintered ceramic body is surrounded by a powder mixture that includes a garnet powder. The density of the sintered ceramic body is increased by applying an increased temperature and isostatic pressure to form the scintillator material.Type: ApplicationFiled: November 12, 2019Publication date: May 13, 2021Inventors: Stephanie Silberstein Bell, Thomas M. Hartnett, Richard Gentilman
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Patent number: 9395467Abstract: A solid solution-based optical material capable of transmitting infrared light, the solid solution-based optical material comprising at least two nano-sized phases intermixed in one another, wherein at least one of the at least two nano-sized phases is a solid solution containing a dissolved dopant, the dissolved dopant present in an amount sufficient to reduce a refractive index difference between the at least two nano-sized phases to about 0.2 or less when infrared light is being transmitted. Various embodiments are directed to related systems and methods. In one embodiment, the infrared light is visible infrared light, short-wave infrared light, eye safe infrared light, medium wave infrared light, long wave infrared red light, or combinations thereof.Type: GrantFiled: September 20, 2013Date of Patent: July 19, 2016Assignee: Raytheon CompanyInventors: Brian J. Zelinski, Richard Gentilman, Christopher Scott Nordahl, Thomas M. Hartnett
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Patent number: 9388086Abstract: In accordance with the present embodiment, a method for making an optical ceramic comprises depositing a plurality of thin layers of powder. The powder comprises a first optical material powder having a first dopant level, and a second optical material powder. The first and second optical material powders are deposited for each layer based on the first dopant level and according to data associated with a three-dimensional (3D) compositional profile design of an optical ceramic. The method further comprises binding the first and second optical material powders of each thin layer to each other and each thin layer with an adjacent layer such that a green state optical ceramic is produced based on the 3D compositional profile design. The method further comprises densifying the green state optical ceramic to obtain the optical ceramic.Type: GrantFiled: March 4, 2011Date of Patent: July 12, 2016Assignee: RAYTHEON COMPANYInventors: Jiyun C. Imholt, Richard L. Gentilman, Thomas M. Hartnett
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Publication number: 20140231727Abstract: A solid solution-based optical material capable of transmitting infrared light, the solid solution-based optical material comprising at least two nano-sized phases intermixed in one another, wherein at least one of the at least two nano-sized phases is a solid solution containing a dissolved dopant, the dissolved dopant present in an amount sufficient to reduce a refractive index difference between the at least two nano-sized phases to about 0.2 or less when infrared light is being transmitted. Various embodiments are directed to related systems and methods. In one embodiment, the infrared light is visible infrared light, short-wave infrared light, eye safe infrared light, medium wave infrared light, long wave infrared red light, or combinations thereof.Type: ApplicationFiled: September 20, 2013Publication date: August 21, 2014Applicant: Raytheon CompanyInventors: Brian J. Zelinski, Richard Gentilman, Christopher Scott Nordahl, Thomas M. Hartnett
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Publication number: 20120225767Abstract: In accordance with the present embodiment, a method for making an optical ceramic comprises depositing a plurality of thin layers of powder. The powder comprises a first optical material powder having a first dopant level, and a second optical material powder. The first and second optical material powders are deposited for each layer based on the first dopant level and according to data associated with a three-dimensional (3D) compositional profile design of an optical ceramic. The method further comprises binding the first and second optical material powders of each thin layer to each other and each thin layer with an adjacent layer such that a green state optical ceramic is produced based on the 3D compositional profile design. The method further comprises densifying the green state optical ceramic to obtain the optical ceramic.Type: ApplicationFiled: March 4, 2011Publication date: September 6, 2012Inventors: Jiyun C. Imholt, Richard L. Gentilman, Thomas M. Hartnett
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Patent number: 8211356Abstract: A method of making aluminum oxynitride includes introducing a mixture having aluminum oxide and carbon into a chamber, agitating the mixture within the chamber, and heating the mixture to make aluminum oxynitride.Type: GrantFiled: July 18, 2000Date of Patent: July 3, 2012Assignee: Surmet CorporationInventors: Thomas M. Hartnett, Joseph M. Wahl
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Publication number: 20110315808Abstract: A solid solution-based optical material capable of transmitting infrared light, the solid solution-based optical material comprising at least two nano-sized phases intermixed in one another, wherein at least one of the at least two nano-sized phases is a solid solution containing a dissolved dopant, the dissolved dopant present in an amount sufficient to reduce a refractive index difference between the at least two nano-sized phases to about 0.2 or less when infrared light is being transmitted. Various embodiments are directed to related systems and methods. In one embodiment, the infrared light is visible infrared light, short-wave infrared light, eye safe infrared light, medium wave infrared light, long wave infrared red light, or combinations thereof.Type: ApplicationFiled: January 19, 2011Publication date: December 29, 2011Inventors: Brian J. Zelinski, Richard Gentilman, Christopher Scott Nordahl, Thomas M. Hartnett
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Patent number: 4686070Abstract: A method of preparing substantially homogeneous aluminum oxynitride powder is provided comprising the steps of reacting gamma aluminum oxide with carbon in the presence of nitrogen, and breaking down the resulting powder into particles in a predetermined size range. A method of preparing a durable optically transparent body from this powder is also provided comprising the steps of forming a green body of substantially homogeneous cubic aluminum oxynitride powder and sintering said green body in a nitrogen atmosphere and in the presence of predetermined additives which enhance the sintering process. Preferred additives are boron, in elemental or compound form, and at least one additional element selected from the group of yttrium and lanthanum or compounds thereof. The sintered polycrystalline cubic aluminum oxynitride has a density greater than 99% of theoretical density, an in-line transmission of at least 50% in the 0.3-5 micron range, and a resolving angle of 1 mrad or less.Type: GrantFiled: October 29, 1984Date of Patent: August 11, 1987Assignee: Raytheon CompanyInventors: Edward A. Maguire, Thomas M. Hartnett, Richard L. Gentilman
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Patent number: 4481300Abstract: A method of preparing substantially homogeneous aluminum oxynitride powder is provided comprising the steps of reacting gamma aluminum oxide with carbon in the presence of nitrogen, and breaking down the resulting powder into particles in a predetermined size range.A method of preparing a durable optically transparent body from this powder is also provided comprising the steps of forming a green body of substantially homogeneous cubic aluminum oxynitride powder and sintering said green body in a nitrogen atmosphere and in the presence of predetermined additives which enhance the sintering process. Preferred additives are boron, in elemental or compound form, and at least one additional element selected from the group of yttrium and lanthanum or compounds thereof. The sintered polycrystalline cubic aluminum oxynitride has a density greater than 99% of theoretical density, an in-line transmission of at least 50% in the 0.3-5 micron range, and a resolving angle of 1 mrad or less.Type: GrantFiled: January 13, 1984Date of Patent: November 6, 1984Assignee: Raytheon CompanyInventors: Thomas M. Hartnett, Richard L. Gentilman, Edward A. Maguire