Patents by Inventor David R. Nelson
David R. Nelson 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: 12173670Abstract: A multi-component structure includes a first hybrid metal composite structure, a second hybrid metal composite structure, and a joint structure. The first and second hybrid metal composite structures include layers, each layer comprising a fiber composite material structure including a fiber material dispersed within a matrix material and at least one metal ply located between layers of the layers. The joint structure extends between and connects the first hybrid metal composite structure and the second hybrid metal composite structure. Additionally, the joint structure exerts a clamping force on the first and second hybrid metal composite structures and to reduce gaps between the layers, between the layers and the at least one metal ply, and between the joint structure and the first and second hybrid metal composite structures to less than half a thickness of the at least one metal ply.Type: GrantFiled: March 10, 2021Date of Patent: December 24, 2024Assignee: Northrop Grumman Systems CorporationInventors: Benjamin W. C. Garcia, Brian Christensen, David R. Nelson
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Patent number: 11851644Abstract: The invention provides a method and related compositions for preparing an effective probiotic bacteria formulation that can be stored, transported and used for protecting a variety of marine organisms against infection by potential pathogens.Type: GrantFiled: May 4, 2020Date of Patent: December 26, 2023Assignee: University of Rhode Island Board of TrusteesInventors: David R. Nelson, Jason LaPorte, David C Rowley, Marta Gomez-Chiarri
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Patent number: 11773029Abstract: A preceramic resin formulation comprising a polycarbosilane preceramic polymer, an organically modified silicon dioxide preceramic polymer, and, optionally, at least one filler. The preceramic resin formulation is formulated to exhibit a viscosity of from about 1,000 cP at about 25° C. to about 5,000 cP at a temperature of about 25° C. The at least one filler comprises first particles having an average mean diameter of less than about 1.0 ?m and second particles having an average mean diameter of from about 1.5 ?m to about 5 ?m. Impregnated fibers comprising the preceramic resin formulation are also disclosed, as is a composite material comprising a reaction product of the polycarbosilane preceramic polymer, organically modified silicon dioxide preceramic polymer, and the at least one filler. Methods of forming a ceramic matrix composite are also disclosed.Type: GrantFiled: November 12, 2020Date of Patent: October 3, 2023Assignee: Northrop Grumman Systems CorporationInventors: Benjamin W. C. Garcia, David R. Nelson
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Patent number: 11719193Abstract: A hybrid metal composite (HMC) structure comprises a first tier comprising a first fiber composite material structure, a second tier longitudinally adjacent the first tier and comprising a first metallic structure and a second fiber composite material structure laterally adjacent the first metallic structure, a third tier longitudinally adjacent the second tier and comprising a third fiber composite material structure, and a fourth tier longitudinally adjacent the third tier and comprising a second metallic structure and a fourth fiber composite material structure laterally adjacent the second metallic structure. At least one lateral end of the second metallic structure is laterally offset from at least one lateral end of the first metallic structure most proximate thereto. Methods of forming an HMC structure, and related rocket motors and multi-stage rocket motor assemblies are also disclosed.Type: GrantFiled: May 25, 2021Date of Patent: August 8, 2023Assignee: Northrop Grumman Systems CorporationInventors: Benjamin W. C. Garcia, Brian Christensen, David R. Nelson, Braden Day
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Patent number: 11491766Abstract: A hybrid metal composite (HMC) structure comprises tiers comprising fiber composite material structures, and additional tiers longitudinally adjacent one or more of the tiers and comprising perforated metallic structures and additional fiber composite material structures laterally adjacent the perforated metallic structures. Methods of forming an HMC structure, and related rocket motors and multi-stage rocket motor assemblies are also disclosed.Type: GrantFiled: August 29, 2016Date of Patent: November 8, 2022Assignee: Northrop Grumman Systems CorporationInventors: Benjamin W. C. Garcia, Braden Day, Brian Christensen, David R. Nelson, Thomas Loveless, Elizabeth Bonderson
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Publication number: 20210340933Abstract: A hybrid metal composite (HMC) structure comprises a first tier comprising a first fiber composite material structure, a second tier longitudinally adjacent the first tier and comprising a first metallic structure and a second fiber composite material structure laterally adjacent the first metallic structure, a third tier longitudinally adjacent the second tier and comprising a third fiber composite material structure, and a fourth tier longitudinally adjacent the third tier and comprising a second metallic structure and a fourth fiber composite material structure laterally adjacent the second metallic structure. At least one lateral end of the second metallic structure is laterally offset from at least one lateral end of the first metallic structure most proximate thereto. Methods of forming an HMC structure, and related rocket motors and multi-stage rocket motor assemblies are also disclosed.Type: ApplicationFiled: May 25, 2021Publication date: November 4, 2021Inventors: Benjamin W.C. Garcia, Brian Christensen, David R. Nelson, Braden Day
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Publication number: 20210285404Abstract: A multi-component structure includes a first hybrid metal composite structure, a second hybrid metal composite structure, and a joint structure. The first and second hybrid metal composite structures include layers, each layer comprising a fiber composite material structure including a fiber material dispersed within a matrix material and at least one metal ply located between layers of the layers. The joint structure extends between and connects the first hybrid metal composite structure and the second hybrid metal composite structure. Additionally, the joint structure exerts a clamping force on the first and second hybrid metal composite structures and to reduce gaps between the layers, between the layers and the at least one metal ply, and between the joint structure and the first and second hybrid metal composite structures to less than half a thickness of the at least one metal ply.Type: ApplicationFiled: March 10, 2021Publication date: September 16, 2021Inventors: Benjamin W.C. Garcia, Brian Christensen, David R. Nelson
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Publication number: 20210253482Abstract: A preceramic resin formulation comprising a polycarbosilane preceramic polymer, an organically modified silicon dioxide preceramic polymer, and, optionally, at least one filler. The preceramic resin formulation is formulated to exhibit a viscosity of from about 1,000 cP at about 25° C. to about 5,000 cP at a temperature of about 25° C. The at least one filler comprises first particles having an average mean diameter of less than about 1.0 ?m and second particles having an average mean diameter of from about 1.5 ?m to about 5 ?m. Impregnated fibers comprising the preceramic resin formulation are also disclosed, as is a composite material comprising a reaction product of the polycarbosilane preceramic polymer, organically modified silicon dioxide preceramic polymer, and the at least one filler. Methods of forming a ceramic matrix composite are also disclosed.Type: ApplicationFiled: November 12, 2020Publication date: August 19, 2021Inventors: Benjamin W.C. Garcia, David R. Nelson
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Patent number: 10954891Abstract: A multi-component structure includes a first hybrid metal composite structure, a second hybrid metal composite structure, and a joint structure. The first and second hybrid metal composite structures include layers, each layer comprising a fiber composite material structure including a fiber material dispersed within a matrix material and at least one metal ply located between layers of the layers. The joint structure extends between and connects the first hybrid metal composite structure and the second hybrid metal composite structure. Additionally, the joint structure exerts a clamping force on the first and second hybrid metal composite structures and to reduce gaps between the layers, between the layers and the at least one metal ply, and between the joint structure and the first and second hybrid metal composite structures to less than half a thickness of the at least one metal ply.Type: GrantFiled: July 13, 2018Date of Patent: March 23, 2021Assignee: Northrop Grumman Innovation Systems, Inc.Inventors: Benjamin W. C. Garcia, Brian Christensen, David R. Nelson
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Patent number: 10875813Abstract: A preceramic resin formulation comprising a polycarbosilane preceramic polymer, an organically modified silicon dioxide preceramic polymer, and, optionally, at least one filler. The preceramic resin formulation is formulated to exhibit a viscosity of from about 1,000 cP at about 25° C. to about 5,000 cP at a temperature of about 25° C. The at least one filler comprises first particles having an average mean diameter of less than about 1.0 ?m and second particles having an average mean diameter of from about 1.5 ?m to about 5 ?m. Impregnated fibers comprising the preceramic resin formulation are also disclosed, as is a composite material comprising a reaction product of the polycarbosilane preceramic polymer, organically modified silicon dioxide preceramic polymer, and the at least one filler. Methods of forming a ceramic matrix composite are also disclosed.Type: GrantFiled: November 21, 2017Date of Patent: December 29, 2020Assignee: Northrop Grumman Innovation Systems, Inc.Inventors: Benjamin W. C. Garcia, David R. Nelson
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Publication number: 20200347345Abstract: The invention provides a method and related compositions for preparing an effective probiotic bacteria formulation that can be stored, transported and used for protecting a variety of marine organisms against infection by potential pathogens.Type: ApplicationFiled: May 4, 2020Publication date: November 5, 2020Inventors: David R. Nelson, Jason LaPorte, David C. Rowley, Marta Gomez-Chiarri
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Patent number: 10603873Abstract: A method of forming a hybrid metal composite structure including at least one metal ply. The method includes forming at least one metal ply, forming the at least one metal ply comprising forming at least one perforation in the at least one metal ply, abrasively blasting at least one surface of the at least one metal ply to coarsen the at least one surface of the metal ply, and exposing the at least one metal ply to at least one of an acid or a base. The method further includes disposing at least one fiber composite material structure adjacent the at least one metal ply. Related methods of forming a portion of a rocket case and related hybrid metal composite structures are also disclosed.Type: GrantFiled: August 29, 2016Date of Patent: March 31, 2020Assignee: Northrop Grumman Innovation Systems, Inc.Inventors: Benjamin W. C. Garcia, Elizabeth Bonderson, Brian Christensen, David R. Nelson
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Publication number: 20200018260Abstract: A multi-component structure includes a first hybrid metal composite structure, a second hybrid metal composite structure, and a joint structure. The first and second hybrid metal composite structures include layers, each layer comprising a fiber composite material structure including a fiber material dispersed within a matrix material and at least one metal ply located between layers of the layers. The joint structure extends between and connects the first hybrid metal composite structure and the second hybrid metal composite structure. Additionally, the joint structure exerts a clamping force on the first and second hybrid metal composite structures and to reduce gaps between the layers, between the layers and the at least one metal ply, and between the joint structure and the first and second hybrid metal composite structures to less than half a thickness of the at least one metal ply.Type: ApplicationFiled: July 13, 2018Publication date: January 16, 2020Inventors: Benjamin W. C. Garcia, Brian Christensen, David R. Nelson
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Publication number: 20190016640Abstract: A preceramic resin formulation comprising a polycarbosilane preceramic polymer, an organically modified silicon dioxide preceramic polymer, and, optionally, at least one filler. The preceramic resin formulation is formulated to exhibit a viscosity of from about 1,000 cP at about 25° C. to about 5,000 cP at a temperature of about 25° C. The at least one filler comprises first particles having an average mean diameter of less than about 1.0 ?m and second particles having an average mean diameter of from about 1.5 ?m to about 5 ?m. Impregnated fibers comprising the preceramic resin formulation are also disclosed, as is a composite material comprising a reaction product of the polycarbosilane preceramic polymer, organically modified silicon dioxide preceramic polymer, and the at least one filler. Methods of forming a ceramic matrix composite are also disclosed.Type: ApplicationFiled: November 21, 2017Publication date: January 17, 2019Inventors: Benjamin W.C. Garcia, David R. Nelson
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Publication number: 20180179990Abstract: A hybrid metal composite (HMC) structure comprises a first tier comprising a first fiber composite material structure, a second tier longitudinally adjacent the first tier and comprising a first metallic structure and a second fiber composite material structure laterally adjacent the first metallic structure, a third tier longitudinally adjacent the second tier and comprising a third fiber composite material structure, and a fourth tier longitudinally adjacent the third tier and comprising a second metallic structure and a fourth fiber composite material structure laterally adjacent the second metallic structure. At least one lateral end of the second metallic structure is laterally offset from at least one lateral end of the first metallic structure most proximate thereto. Methods of forming an HMC structure, and related rocket motors and multi-stage rocket motor assemblies are also disclosed.Type: ApplicationFiled: December 27, 2016Publication date: June 28, 2018Inventors: Benjamin W.C. Garcia, Brian Christensen, David R. Nelson, Braden Day
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Publication number: 20180126702Abstract: A method of forming a hybrid metal composite structure including at least one metal ply. The method includes forming at least one metal ply, forming the at least one metal ply comprising forming at least one perforation in the at least one metal ply, abrasively blasting at least one surface of the at least one metal ply to coarsen the at least one surface of the metal ply, and exposing the at least one metal ply to at least one of an acid or a base. The method further includes disposing at least one fiber composite material structure adjacent the at least one metal ply. Related methods of forming a portion of a rocket case and related hybrid metal composite structures are also disclosed.Type: ApplicationFiled: August 29, 2016Publication date: May 10, 2018Inventors: Benjamin W.C. Garcia, Elizabeth Bonderson, Brian Christensen, David R. Nelson
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Publication number: 20180056632Abstract: A hybrid metal composite (HMC) structure comprises tiers comprising fiber composite material structures, and additional tiers longitudinally adjacent one or more of the tiers and comprising perforated metallic structures and additional fiber composite material structures laterally adjacent the perforated metallic structures. Methods of forming an HMC structure, and related rocket motors and multi-stage rocket motor assemblies are also disclosed.Type: ApplicationFiled: August 29, 2016Publication date: March 1, 2018Inventors: Benjamin W.C. Garcia, Braden Day, Brian Christensen, David R. Nelson, Thomas Loveless, Elizabeth Bonderson
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Patent number: 7871629Abstract: A method for immunizing fish against pathogenic infection is disclosed. More particularly, this invention provides a method of immunizing fish against bacterial and viral infection which comprises immersing the fish in a solution comprised of an effective amount of dead or attenuated, whole-celled recombinant bacteria, the recombinant bacteria having a eukaryotic expression vector (plasmid) incorporated therein having DNA of interest encoding at least one protein antigen for each of the pathogens, the method characterized in that the protein antigen is produced by the fish.Type: GrantFiled: April 14, 2010Date of Patent: January 18, 2011Assignee: The Board of Governors for Higher Education, State of Rhode Island and Providence PlantationsInventors: Marta Gomez-Chiarri, David R. Nelson
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Patent number: RE40767Abstract: An unmanned integrated RES 12 integrates all of its components except the reflector 22 into a single console 30 that is positioned at the side of a road and has a CPU 36 that controls calibration, verification and data gathering. The RES's source 32 and receiver 34 are preferably stacked one on top of the other such that the IR beam 24 traverses a low and high path as it crosses the road 14. This allows the RES to detect both low and high ground clearance vehicles. To maintain the vehicle processing and identification throughput, the speed sensor 54 and ALPR 48,50 detect the passing vehicles at steep angles, approximately 20 to 35 degrees. In a preferred system, a manned control center 16 communicates with a large number of the unmanned integrated RES to download emissions data, perform remote diagnostics, and, if necessary, dispatch a technician to perform maintenance on a particular RES.Type: GrantFiled: November 9, 2000Date of Patent: June 23, 2009Assignee: Environmental Systems Products Holdings Inc.Inventors: Jay Peterson, David R Nelson, Troy P. Bahan, George C. Polchin, Michael D. Jack
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Patent number: RE44214Abstract: An unmanned integrated RES 12 integrates all of its components except the reflector 22 into a single console 30 that is positioned at the side of a road and has a CPU 36 that controls calibration, verification and data gathering. The RES's source 32 and receiver 34 are preferably stacked one on top of the other such that the IR beam 24 traverses a low and high path as it crosses the road 14. This allows the RES to detect both low and high ground clearance vehicles. To maintain the vehicle processing and identification throughput, the speed sensor 54 and ALPR 48,50 detect the passing vehicles at steep angles, approximately 20 to 35 degrees. In a preferred system, a manned control center 16 communicates with a large number of the unmanned integrated RES to download emissions data, perform remote diagnostics, and, if necessary, dispatch a technician to perform maintenance on a particular RES.Type: GrantFiled: June 22, 2009Date of Patent: May 14, 2013Assignee: Envirotest Systems Holdings Corp.Inventors: Jay Peterson, David R Nelson, Troy P. Bahan, George C. Polchin, Michael D. Jack