Processes Of Making Patents (Class 149/109.6)
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Patent number: 8729261Abstract: The present invention relates to a method for recrystallizing fine spherical cyclotrimethylenetrinitramine (Research Department Explosive, hereinafter, referred to as “RDX”) particles, and the method for recrystallizing fine spherical RDX particles according to the present invention may include (a) introducing a powder material containing RDX into a container, (b) introducing a dimethylether compressed gas into the container and dissolving the RDX to form a RDX solution, (c) releasing and decompressing the RDX solution into atmospheric pressure to form crystallized RDX particles, and (d) separating and collecting the RDX particles.Type: GrantFiled: October 26, 2011Date of Patent: May 20, 2014Assignee: Agency for Defense DevelopmentInventors: Byoung-Min Lee, Youn-Woo Lee, Hyoun-Soo Kim, Joo-Seung Chae
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Patent number: 8696838Abstract: A method of manufacture of foamed celluloid molded products, involving three steps for the manufacture of higher density (0.7 to 1.25 gm/cc) foamed celluloid products or simple geometry lower density (0.2 to 0.7 gm/cc) foamed celluloid products, and four steps for the manufacture of lower density foamed celluloid products of any geometry. The three step process involving: (1) providing small, uniform, pieces of celluloid; (2) presoaking the pieces in a physical blowing agent (PBA) under pressure; and (3) foaming at raised temperature a controlled quantity of the presoaked pieces in a mold—to obtain the desired shape and density. For a lower density foamed celluloid product, of any moldable geometry, the steps are to: (1) small pieces of celluloid, that (2) have been presoaked in a PBA, are (3) pre-expanded to an intermediate density, and then (4) foam the desired lower density foamed product in a mold at raised temperature.Type: GrantFiled: November 30, 2011Date of Patent: April 15, 2014Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: Niloufar Faridi, Linjie Zhu, Ming-Wan Young, Costas G. Gogos, Fei Shen, Elbert Caravaca, Mohamed Elalem, Viral Panchal, Dale Conti
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Patent number: 8696837Abstract: The present invention is directed to an explosive composition comprised of heavy ANFO and expanded polymeric beads that have a density that is less than the density of the heavy ANFO. The expanded polymeric beads have a size that is determined or based on the size of ammonium nitrate prills used in the heavy ANFO portion of the composition. In one embodiment, the expanded polymeric beads that are utilized in the composition are at least 70% of the lower limit of the mesh size of the predominant ammonium nitrate prill mesh size. In another embodiment, the expanded polymeric beads are at least 70% of the a size that is related to the average mesh size of the ammonium nitrate prills.Type: GrantFiled: October 10, 2010Date of Patent: April 15, 2014Inventor: Kevin H. Waldock
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Patent number: 8652277Abstract: A method forms a relatively stable ammonium nitrate composite material. The method includes (a) blending ammonium nitrate with an average particle diameter greater than about 1 mm and a substantially non-oxidizing compound in fine particle form; and (b) reducing the average size of said ammonium nitrate granules in the presence of the non-oxidizing compound in fine particle form to produce a substantially homogeneous blend of ammonium nitrate and the non-oxidizing compound having an average particle diameter of about 1 to about 1,000 ?m to form a substantially non-explosive powder.Type: GrantFiled: February 14, 2011Date of Patent: February 18, 2014Assignee: Honeywell International Inc.Inventors: Alan B. Levy, James A. Kweeder, Jose Carrazza, Kenneth D. Kunz
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Patent number: 8647451Abstract: A method of manufacturing an explosive testing agent is disclosed. The method includes synthesizing hydrogen bronze nanoparticles and placing the nanoparticles on a test platform.Type: GrantFiled: June 29, 2010Date of Patent: February 11, 2014Assignee: The Board of Regents for Oklahoma State UniversityInventors: Allen Wallace Apblett, Nicholas Ferdinand Materer
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Patent number: 8636861Abstract: Secondary crystalline high explosives are disclosed which are suitable for filling very small volume loading holes in micro-electric initiators for micro-electro-mechanical mechanisms (MEMS), used as safe and arm (S&A) devices. The explosives are prepared by adding the such a high explosive to an aqueous first volatile mobile phase, adding such a high explosive to a non-aqueous second volatile mobile phase, mixing the first and second volatile mobile phases and then loading the combined phases into the MEMS device and allowing the aqueous and non-aqueous solvents to evaporate depositing the high explosive. Enhanced adhesion between the deposited high explosive and enhanced rheological properties can be obtained by adding a polymeric binder to both mobile phases.Type: GrantFiled: December 29, 2010Date of Patent: January 28, 2014Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Daniel Stec, III, Amy Wilson, Brian E. Fuchs, Neha Mehta, Paula Cook
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Patent number: 8632643Abstract: Embodiments of materials suitable for use as a replacement for Tetrazene and methods of preparing such materials are described. In one embodiment, the material comprises MTX-1, as well as simple salts or complexes derived therefrom. The methods of preparing such materials include combining Tetrazene and an acid to form a suspension, where the acid is nitric acid, sulfuric acid, perchloric acid, or hydrochloric acid. A nitrite salt may be added to the suspension, where the nitrite salt is sodium nitrite, lithium nitrite, potassium nitrite, an aqueous solution of sodium nitrite, an aqueous solution of lithium nitrite, or an aqueous solution of potassium nitrite. In some embodiments, the suspension is stirred until the suspension has a white appearance.Type: GrantFiled: August 1, 2013Date of Patent: January 21, 2014Assignee: Pacific Scientific Energetic Materials CompanyInventors: John W. Fronabarger, Michael D. Williams
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Patent number: 8632642Abstract: An explosive component includes a first storage container holding a fuel, a second storage container holding an oxidizer, a mixer to mix the fuel and the oxidizer together into an energetic mixture, and a third storage container to hold the energetic mixture.Type: GrantFiled: February 4, 2009Date of Patent: January 21, 2014Assignee: Raytheon CompanyInventor: Ronald J. Butte
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Patent number: 8623157Abstract: An ANFO explosive composition includes a mixture of ammonium nitrate particles, an organic combustible fuel, and a chemical coupling agent having an aliphatic portion and an epoxy group. The chemical coupling agent may be selected from the group consisting of an epoxidized oil, an ester derivative of epoxidized oil and mixtures thereof. The use of such chemical coupling agents and a method of producing the ANFO explosive composition is also disclosed.Type: GrantFiled: August 25, 2003Date of Patent: January 7, 2014Assignee: ETI Canada Inc.Inventors: Ron Robeniol Legario, Ivana Alilovic
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Patent number: 8617328Abstract: An economical, low residue, mortar increment propellant container manufactured of foamed celluloid, which is composed of 50 to 84% nitrocellulose, having a nitrogen content of from about 10.5 to about 13.5%, and about 15 to about 50% camphor. The burn rate of the foamed celluloid can be enhanced by the addition of energetic additives, such as energetic plasticizers.Type: GrantFiled: June 12, 2009Date of Patent: December 31, 2013Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: Ming-Wan Young, Costas G. Gogos, Niloufar Faridi, Linjie Zhu, Peter Bonnett, Howard Shimm, Elbert Caravaca, Joseph Palk, Jr.
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Patent number: 8608879Abstract: The present invention is a flare illuminant composition, useful in hand-held signals, which composition is environmentally friendly and economical, containing a commercially available, aromatic, high energy, amine-based organic compound, 5-aminotetrazole, in place of the conventional and toxic KClO4, or, for the known alternative to KClO4, expensive, strontium bis-(1-methyl-5-nitriminotetrazolate)monohydrate.Type: GrantFiled: December 19, 2011Date of Patent: December 17, 2013Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: Jesse J. Sabatini, Gary Chen, Amita Nagori, Reddy Damavarapu
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Patent number: 8608880Abstract: A method for the retraction of an explosive component from a high explosive, including the steps of loading a high explosive containing an explosive component into an striping down vessel; supplying a supercritical fluid to the striping down vessel; contacting the high explosive with the supercritical fluid at a temperature below the melting point of the explosive component and at a pressure sufficient to strip down the explosive component; and inducing a sonicating process on the striping down vessel simultaneously at a frequency of 2 MHz to 10 MHz.Type: GrantFiled: March 7, 2013Date of Patent: December 17, 2013Assignee: Tai Cham Technology Co. Ltd.Inventors: Jin-Shuh Li, Taso-Fa Yeh, Kai-Tai Lu, Yung-Ho Chiu, Shou-Hsiu Chen
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Publication number: 20130327456Abstract: A process for producing an intermediate emulsion comprising an oxidizer solution, fuel and emulsifier, which process comprises the steps of: (a) mixing in a micromixer an oxidizer solution with a fuel blend comprising a fuel and an emulsifier so as to solubilise a portion of the oxidizer solution in the fuel blend to produce a precursor product; (b) mixing the precursor product obtained in step (a) using a micromixer in one or more successive stages in order to form the intermediate emulsion.Type: ApplicationFiled: August 12, 2011Publication date: December 12, 2013Applicant: ORICA INTERNATIONAL PTE LTD.Inventors: Richard John Goodridge, Vladimir Sujansky, Ivan Junarsa, Kira McGrath
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Patent number: 8603271Abstract: Method and device for mixing and initiating a pyrotechnic charge, comprising at least one coherent porous fuel structure (16) and at least one oxidizer (8). According to the invention, the coherent porous fuel structure (16) and the oxidizer (8) are placed apart in a mixing device (1, 20) to prevent unintentional ignition, and in which the oxidizer (8), in response to the action of a force upon the mixing device (1, 20), for example upon firing of an artillery shell, is transported into the coherent porous fuel structure (16), after which the obtained pyrotechnic charge is initiated after a set time delay.Type: GrantFiled: November 8, 2012Date of Patent: December 10, 2013Assignee: BAE Systems Bofors ABInventors: Mats Runemard, Christian Vieider
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Patent number: 8603270Abstract: The present invention provides a method of using a neutral ionic liquid to at least one of stabilize a peroxidic explosive and to produce a stable solution of the peroxidic explosive which includes providing the neutral ionic liquid and using the neutral ionic liquid to at least one of stabilize the peroxidic explosive and to produce the stable solution of the peroxidic explosive. The present invention further provides a stable composition which includes a solution of at least one neutral ionic liquid and a detectable amount of a peroxidic explosive, a method of production thereof, and a method of use thereof as an odor sample.Type: GrantFiled: June 18, 2010Date of Patent: December 10, 2013Assignees: Rheinische Friedrich-Wilhelms-Universitaet Bonn, Diehl BGT, Defence GmbH & Co. KGInventors: Siegfried Waldvogel, Carsten Siering, Daniel Lubczyk, Joerg Loebau, Arno Hahma
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Patent number: 8597445Abstract: A priming mixture is provided having a primary explosive and an oxidizer system containing bismuth oxide. The priming mixture generally is applicable to any application or device that employs ignition of a propellant or fuel, including, but not limited to, air bag gas generator systems, signaling devices, ejection seats, small or large arms ammunition primers, and the like.Type: GrantFiled: February 1, 2012Date of Patent: December 3, 2013Assignee: RA Brands, L.L.C.Inventors: Donald A. Pile, Henry J. John, Jr.
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Systems and methods for chemical and/or mechanical remediation of nitro compounds and nitrate esters
Patent number: 8585841Abstract: Systems and methods for chemoremediation or mechanical destruction of undetonated explosive materials. An explosive apparatus contains an explosive material in close proximity to a chemical reagent selected for its chemoremediative properties. A barrier is interposed between the explosive material and the chemical reagent to delay the chemoremediation of the explosive material. Alternatively a water expandable material may be incorporated into the explosive material, whereby upon exposure to moisture the water absorbing material will expand sufficiently to fragment the explosive material into initiation insensitive particles. Initiation insensitivity is achieved by incorporation of water, which acts as a desensitizing agent as well as fragmenting the explosive material into particles sufficiently small that they are below the critical diameter for explosive initiation.Type: GrantFiled: June 24, 2010Date of Patent: November 19, 2013Assignee: MaxamCorp Holding S.L.Inventors: Carl Hermanus Lubbe, Delana Harris, José Manuel Botija González, Fernando María Beitia Gómez De Segura -
Patent number: 8585839Abstract: A large-scale synthetic method that enables the preparation of nanoenergetic composites in kilogram scales which forms superior materials as compared to the ultra-sonicated nanoenergetic composites and at a lower cost for use in explosive, pyrotechnic, agent defeat, ammunition primers, and propellant applications.Type: GrantFiled: June 27, 2012Date of Patent: November 19, 2013Assignee: The United States of America as Represented by the Secretary of the NavyInventor: Kelvin T. Higa
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Patent number: 8585840Abstract: A process for recovering the energetic component from plastic bonded explosives. The process uses high velocity kinetic energy in the form of gases, liquids, or solids, alone or in combination, to cause the structural failure of the adhesive bonding between the polymer matrix and energetic component for the purpose of providing adequate loci for the solvation of the energetic component by appropriate solvents.Type: GrantFiled: February 6, 2008Date of Patent: November 19, 2013Assignee: G.D.O., Inc.Inventors: Paul L. Miller, Steve J. Schmit
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Patent number: 8580054Abstract: In one embodiment, a melt-castable energetic material comprises at least one of: 3,5-bis(4-nitro-1,2,5-oxadiazol-3-yl)-1,2,4-oxadiazole (DNFO), and 3-(4-amino-1,2,5-oxadiazol-3-yl)-5-(4-nitro-1,2,5-oxadiazol-3-yl)-1,2,4-oxadiazole (ANFO). In another embodiment, a method for forming a melt-castable energetic material includes reacting 3,5-bis(4-amino-1,2,5-oxadiazol-3-yl)-1,2,4-oxadiazole (DAFO) with oxygen or an oxygen-containing compound to form a mixture of at least: DNFO, and ANFO.Type: GrantFiled: April 4, 2012Date of Patent: November 12, 2013Assignee: Lawrence Livermore National Security, LLCInventors: Philip F. Pagoria, Mao X. Zhang
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Patent number: 8568543Abstract: An explosive composition is provided that is comprised of a Heavy ANFO and grain hulls. In one embodiment, the grain hulls are comprised of rice hulls. The grain hulls serve both as an inert bulking additive that reduces the density of the composition and as a sensitizer that reduces the energy needed to reliably detonate the composition. Also provided is a method for manufacturing an explosive composition comprised of Heavy ANFO and grain hulls, such as rice hulls. Additionally, a method of using an explosive comprised of ANFO and grain hulls in a mining operation is disclosed.Type: GrantFiled: April 17, 2012Date of Patent: October 29, 2013Inventor: Kevin H. Waldock
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Patent number: 8562768Abstract: The main subject of the present invention are solid compounds capable of generating hydrogen by a self-sustaining combustion reaction. Their composition comprises borazane and/or polyaminoborane and at least one inorganic oxidant, advantageously chosen from ammonium nitrate, alkali metal nitrates, alkaline-earth metal nitrates, metal nitrates, metal oxides, oxidants of the family of dinitramines and mixtures thereof. It also relates to the generation of hydrogen by self-sustaining combustion of at least one such compound.Type: GrantFiled: April 16, 2009Date of Patent: October 22, 2013Assignee: HeraklesInventors: Pierre Yvart, Joel Renouard, Helene Blanchard, Hugues Rocton
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Patent number: 8557066Abstract: A method for the preparation of neat energetic powders, having nanometer dimensions, is described herein. For these neat powder, a solution of a chosen energetic material is prepared in an aprotic solvent and later combined with liquid hexane that is miscible with such solvent. The energetic material chosen is less soluble in the liquid hexane than in the aprotic solvent and the liquid hexane is cooled to a temperature that is below that of the solvent solution. In order to form a precipitate of said neat powders, the solvent solution is rapidly combined with the liquid hexane. When the resulting precipitate is collected, it may be dried and filtered to yield an energetic nanopowder material.Type: GrantFiled: November 8, 2011Date of Patent: October 15, 2013Assignee: U.S. Department of EnergyInventors: Kien-Yin Lee, Blaine W. Asay, James E. Kennedy
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Publication number: 20130263982Abstract: In one embodiment, a melt-castable energetic material comprises at least one of: 3,5-bis(4-nitro-1,2,5-oxadiazol-3-yl)-1,2,4-oxadiazole (DNFO), and 3-(4-amino-1,2,5-oxadiazol-3-yl)-5-(4-nitro-1,2,5-oxadiazol-3-yl)-1,2,4-oxadiazole (ANFO). In another embodiment, a method for forming a melt-castable energetic material includes reacting 3,5-bis(4-amino-1,2,5-oxadiazol-3-yl)-1,2,4-oxadiazole (DAFO) with oxygen or an oxygen-containing compound to form a mixture of at least: DNFO, and ANFO.Type: ApplicationFiled: April 4, 2012Publication date: October 10, 2013Applicant: LAWRENCE LIVERMORE NATIONAL SECURITY, LLCInventors: Philip F. Pagoria, Mao Xi Zhang
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Patent number: 8545646Abstract: The present disclosure relates to a high-density rocket propellant and associated recoilless launching systems and methods with tungsten powder added providing substantial mass to the propellant for additional impulse, absorption of sound, optimization of back blast and carry weight, and the like. In an exemplary embodiment, the high-density rocket propellant includes tungsten mass percentages of between about 70%-about 80%, equivalent to about 17%-about 26% by volume.Type: GrantFiled: September 24, 2009Date of Patent: October 1, 2013Assignee: The United States of America as Represented by the Secretary of the NavyInventors: Matthew J. Sanford, Randolph T. Johnson, Paul G. Wallman, Diana O. Bragunier, Stephen N. Stiles
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Patent number: 8524019Abstract: Embodiments of materials suitable for use as a replacement for Tetrazene and methods of preparing such materials are described. In one embodiment, the material comprises MTX-1, as well as simple salts or complexes derived therefrom. The methods of preparing such materials include combining Tetrazene and an acid to form a suspension, where the acid is nitric acid, sulfuric acid, perchloric acid, or hydrochloric acid. A nitrite salt may be added to the suspension, where the nitrite salt is sodium nitrite, lithium nitrite, potassium nitrite, an aqueous solution of sodium nitrite, an aqueous solution of lithium nitrite, or an aqueous solution of potassium nitrite. In some embodiments, the suspension is stirred until the suspension has a white appearance.Type: GrantFiled: April 21, 2011Date of Patent: September 3, 2013Assignee: Pacific Scientific Energetic Materials CompanyInventors: John W. Fronabarger, Michael D. Williams
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Patent number: 8512489Abstract: Apparatus for storing and dispensing flowable explosive, the apparatus including an explosive pump for pumping flowable explosive into an explosive tank having a fluid pressure-actuated piston movable therein for expelling flowable explosive out of the explosive tank through a delivery hose fitted with an injector through which one or more additives from one or more additive tanks can he pumped by an additive pump.Type: GrantFiled: September 7, 2012Date of Patent: August 20, 2013Assignee: Orica Explosives Technology Pty LtdInventor: Marc Rancourt
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Patent number: 8512490Abstract: The invention provides methods for making homogeneous metal oxide nanoenergetic composites. A method of the invention forms a metal oxide nanostructure via a sol-gel process with surfactant templating. Metal nanoparticles are introduced into the metal oxide nanostructure via wet impregnation.Type: GrantFiled: September 7, 2012Date of Patent: August 20, 2013Assignee: The Curators of the University of MissouriInventors: Shubhra Gangopadhyay, Daniel Tappmeyer, Andrey Bezmelnystin, Rajagopalan Thiruvengadathan, Rajesh Shende, Bhushan Mehendale, Steve Apperson, Sved Barizuddin, Keshab Gangopadhyay
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Patent number: 8491736Abstract: The present invention relates to a method for crystallizing ammonium dinitramide (ADN), through spontaneous nucleation and crystal growth, from a solution containing said ammonium dinitramide (AND) dissolved in a solvent. Said solvent characteristically has a viscosity greater than or equal to 0.25 Pa s (250 cP) when said spontaneous nucleation is implemented. The ADN crystals obtained by said method have a median shape factor of 1 to 1.5 and are perfectly suitable for placement in the composition of energy materials.Type: GrantFiled: September 17, 2009Date of Patent: July 23, 2013Assignees: Herakles, EurencoInventors: Florent Muscatelli, Joel Renouard, Jean-Marc Bouchez
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Patent number: 8480825Abstract: A method of in-situ remediation of chlorinated and fluorinated reaction by-products resulting from energetic detonations and/or burning of energetic mixtures comprising adding a quantity of Calcium disilicide (CaSi2), Calcium silicide (CaSi), Magnesium disilicide (MgSi2), Magnesium silicide, or Aluminum Calcium (Al2Ca) compounds to the energetic mixture prior to its detonation and/or burning. Advantageously, the in-situ production of more inert by-products results from this addition thereby preventing the formation of any less-desirable by-products.Type: GrantFiled: September 8, 2011Date of Patent: July 9, 2013Assignee: The United States of America as represented by the Secretary of the NavyInventor: Paul E. Anderson
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Patent number: 8465608Abstract: A method for forming a metastable intermolecular composite (MIC) includes providing a vacuum level of <10?8 torr base pressure in a deposition chamber. A first layer of a first material of a metal that is reactive with water vapor is deposited, followed by depositing a second layer of a second material of a metal oxide on the first layer. The first and second material are capable of an exothermic chemical reaction to form at least one product, and the first and second layer are in sufficiently close physical proximity so that upon initiation of the exothermic reaction the reaction develops into a self initiating chemical reaction. An interfacial region averaging <1 nm thick is formed between the first layer and second layer from a reaction of the first material with water vapor. In one embodiment, the first material is Al and the second material is CuOx.Type: GrantFiled: September 28, 2012Date of Patent: June 18, 2013Assignee: University of Central Florida Research Foundation, Inc.Inventors: Kevin R. Coffey, Edward Alan Dein, Bo Yao
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Patent number: 8465606Abstract: A composition of matter for an incendiary device includes a thermate component consisting of strontium nitrate Gr A, black iron oxide Gr B, aluminum Gr D Cl 5, aluminum Gr E Cl 6, sulfur Gr E, and polyacrylic rubber; and an ignition component consisting of potassium nitrate, titanium, aluminum, silicon, sulfur, charcoal, and polyacrylic rubber, wherein the thermate component consists of a barium nitrate free thermate formulation, and wherein the ignition component consists of a lead free ignition formulation. A parts by weight composition of the thermate component consists of 20.59% strontium nitrate Gr A, 48.04% black iron oxide Gr B, 17.57% aluminum Gr D Cl 5, 9.88% aluminum Gr E Cl 6, 1.96% sulfur Gr E, and 1.96% polyacrylic rubber, and a parts by weight composition of the ignition component consists of 66% potassium nitrate, 11% titanium, 8% aluminum, 6% silicon, 2% sulfur, 5% charcoal, and 2% polyacrylic rubber.Type: GrantFiled: January 16, 2009Date of Patent: June 18, 2013Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: David R. Redding, Gene V. Tracy
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Patent number: 8460487Abstract: A method of desensitization of a sensitive liquid is provided, which includes the continuous stirring of the sensitive liquid with an inert liquid.Type: GrantFiled: June 17, 2009Date of Patent: June 11, 2013Assignee: Rafael, Advanced Defense Systems LtdInventors: Benjamin Keren, Yael Cohen-Arazi, Edith Sokol, David Fischer
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Patent number: 8444786Abstract: Solid composite propellants are provided that include a matrix comprising an energetic oxidizer and a binder. A multi-layered reactive thin film is provided in the matrix. The reactive thin film includes metal and inorganic oxidizer. Methods of making the solid composite propellants are also provided.Type: GrantFiled: September 22, 2011Date of Patent: May 21, 2013Assignee: Lockheed Martin CorporationInventors: George D. Hugus, Edward W. Sheridan
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Patent number: 8444785Abstract: Solid composite propellants are provided that include a matrix comprising an energetic oxidizer and a binder. A multi-layered reactive thin film is provided in the matrix. The reactive thin film includes metal and inorganic oxidizer. Methods of making the solid composite propellants are also provided.Type: GrantFiled: January 5, 2007Date of Patent: May 21, 2013Assignee: Lockheed Martin CorporationInventors: George D. Hugus, Edward W. Sheridan
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Patent number: 8430982Abstract: A pyrophoric material comprises a pyrophoric metal coated onto a wire mesh substrate. Iron and nickel are the preferred metals and a steel wire mesh is suitable. A process for making the pyrophoric material involves spraying an alloy of iron and/or nickel with aluminium onto a mesh using a high velocity oxy-fuel (HVOF) process following by leaching out at least a proportion of the aluminium by treatment with an alkaline solution. The product has application as a supported catalyst or as either an ignition medium or as a flare material in military countermeasures in which applications it is capable of burning at a high temperature.Type: GrantFiled: April 14, 2009Date of Patent: April 30, 2013Assignee: The Secretary of State for DefenceInventors: James Dominic Callaway, James Neil Towning, Raymond Cook, Paul Smith, David Graham McCartney, Andrew J. Horlock
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Patent number: 8425704Abstract: Silicon-based explosive devices and methods of manufacture are provided. In this regard, a representative method involves: providing a doped silicon substrate; depositing undoped silicon on a first side of the substrate; and infusing an oxidizer into an area bounded at least in part by the undoped silicon; wherein the undoped silicon limits an exothermic reaction of the doped silicon to the bounded area. Another representative method involves: providing a doped silicon substrate; depositing a masking layer of low-pressure chemical vapor deposited (LPCVD) Silicon nitride to the first side of the substrate; patterning the nitride mask and etching the porous silicon, and infusing oxidizer into an area bounded by the LPCVD nitride; wherein the silicon nitride limits an exothermic reaction of the doped silicon to the bounded area.Type: GrantFiled: August 4, 2009Date of Patent: April 23, 2013Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: Luke J. Currano, Ronald G. Polcawich, Wayne Churaman, Mark Gelak
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Patent number: 8425701Abstract: An explosive composition is provided comprising an explosive agent, a solid fuel and a polymeric adherent wherein the explosive agent, solid fuel and polymeric adherent are dispersed throughout the composition.Type: GrantFiled: April 28, 2009Date of Patent: April 23, 2013Assignee: Blew Chip Holdings Pty Ltd.Inventors: Alan Twomey, Michael Twomey
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Patent number: 8425702Abstract: An ionic liquid is disclosed. A precursor composition that comprises at least one ionic liquid and at least one energetic material is also disclosed, as is a method of synthesizing an ionic liquid and a method of desensitizing an explosive composition.Type: GrantFiled: July 6, 2011Date of Patent: April 23, 2013Assignee: Alliant Techsystems Inc.Inventors: Steven M. Nicolich, Alexander J. Paraskos, Daniel W. Doll, Gary K. Lund, Wendy A. Balas
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Patent number: 8409377Abstract: Combustible structural composites and methods of forming same are disclosed. In an embodiment, a combustible structural composite includes combustible material comprising a fuel metal and a metal oxide. The fuel metal is present in the combustible material at a weight ratio from 1:9 to 1:1 of the fuel metal to the metal oxide. The fuel metal and the metal oxide are capable of exothermically reacting upon application of energy at or above a threshold value to support self-sustaining combustion of the combustible material within the combustible structural composite. Structural-reinforcing fibers are present in the composite at a weight ratio from 1:20 to 10:1 of the structural-reinforcing fibers to the combustible material. Other embodiments and aspects are disclosed.Type: GrantFiled: July 28, 2011Date of Patent: April 2, 2013Assignee: Battelle Energy Alliance, LLCInventors: Michael A. Daniels, Ronald J. Heaps, Eric D. Steffler, W. David Swank
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Publication number: 20130055918Abstract: Methods of forming energetic compositions include forming a premix comprising a nitrate ester, a polymer, and a stabilizer, and combining solids with the premix. Additional stabilizer may be added with the solids and may remain in a crystalline state. Some methods include dissolving a stabilizer in at least one of a plurality of nitrate esters. Energetic compositions include a continuous matrix and a stabilizer. The continuous matrix includes a nitrate ester and surrounds a solid energetic material. Some compositions include a first nitrate ester, a second nitrate ester having a decomposition rate lower than the first nitrate ester, and a stabilizer. An article includes a housing and an energetic composition in the housing.Type: ApplicationFiled: September 2, 2011Publication date: March 7, 2013Applicant: ALLIANT TECHSYSTEMS INC.Inventors: John R. Moser, JR., Richard L. Raun, David D. Shaw
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Publication number: 20130048163Abstract: Propellant compositions include an energetic binder, such as nitrocellulose, and a stabilized, encapsulated red phosphorous as a ballistic modifier. The propellant composition may additionally include an energetic plasticizer, such as nitroglycerine. For example, the propellant composition may be formed by mixing a double or multi base propellant that includes nitrocellulose plasticized with nitroglycerine with the stabilized, encapsulated red phosphorus. The propellant compositions may be substantially lead-free and may exhibit improved ballistic properties. Methods of forming such propellant compositions and an ordnance device including such propellant compositions are also disclosed.Type: ApplicationFiled: August 31, 2011Publication date: February 28, 2013Applicant: ALLIANT TECHSYSTEMS INC.Inventors: Matthew T. Hafner, Ruben Balangue, Danny D. Clark, John William Westbrook, III
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Patent number: 8382921Abstract: An apparatus for compressing powders and the like including a head assembly with a distensible elastic platen mounted in a chambered header plate containing a pressurizing fluid. The elastic platen distends in response to the pressurizing fluid. Further, a base assembly includes a rigid platen mounted in a base plate. The rigid platen includes a face with at least one cavity, into which is added powder to be compressed. The elastic platen is aligned with the rigid platen, and during compression, the two platens may be held firmly in contact. The pressurizing fluid pumped into the head assembly causes the elastic platen to deform forming a single distention per cavity. The distensions compress the powder to an optimal density. The apparatus safely and easily compact multiple small samples of explosives and the like into miniature charges.Type: GrantFiled: September 11, 2008Date of Patent: February 26, 2013Assignee: The United States of America as represented by the Secretary of the NavyInventors: Gerald R. Laib, Michael Beggans
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Patent number: 8372224Abstract: The present inventions provide methods of manufacturing methods for case metallic materials for munitions that have high enthalpic energy release and controlled fragmentation and breakup enabling fragment speeds up to twice what is otherwise possible in explosively driven metal systems, and munitions made by such methods. Embodiments of the invention involve the thixotropic processing of energetic materials such as aluminum together with high density materials such as tantalum or tungsten to achieve material microstructures with a bulk density equivalent to steel, but with the energy release potential of materials such as finely dispersed aluminum powders.Type: GrantFiled: March 12, 2010Date of Patent: February 12, 2013Assignee: B6 Sigma, Inc.Inventors: Vivek R Dave, Mark J Cola, Robert E Swanson, Daniel Hartman
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Patent number: 8366847Abstract: Perchlorate-free flare compositions are disclosed which, when burned, produce yellow smoke and flames. Methods of producing the compositions are also disclosed.Type: GrantFiled: January 14, 2011Date of Patent: February 5, 2013Assignee: The United States of America as represented by the Secretary of the NavyInventors: Christina M. Yamamoto, Robert G. Shortridge
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Publication number: 20130025748Abstract: The invention is directed to a method for preparing a pyrotechnic composition, to the use of a water-soluble cellulose ether binder, to a pyrotechnic composition, to a method for preparing a pyrotechnic charge, and to a pyrotechnic charge. The method of the invention comprises mixing the fibrous nitrocellulose in wet form with the one or more water-soluble cellulose ether binders and optionally one or more solvents, wherein the amount of organic solvent in the mixture is 10 wt. % or less based on total weight of the mixture.Type: ApplicationFiled: January 19, 2011Publication date: January 31, 2013Applicant: CLEARSPARK, LLCInventors: Martijn Zebregs, Murk Pieter Van Rooijen, Rutger Webb
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Publication number: 20130014866Abstract: A method for the retraction of an explosive component from a high explosive, including the steps of loading a high explosive containing an explosive component into an extraction vessel. A supercritical fluid is supplied to the extraction vessel. The high explosive is contacting with the supercritical fluid at a temperature below the melting point of the explosive component and at a pressure sufficient to extract the explosive component.Type: ApplicationFiled: July 14, 2011Publication date: January 17, 2013Inventors: JIN-SHUH LI, Taso-Fa Yeh, Kai-Tai Lu, Yung-Ho Chiu, Shuo-Hsiu Chen
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Publication number: 20130000800Abstract: The invention provides methods for making homogeneous metal oxide nanoenergetic composites. A method of the invention forms a metal oxide nanostructure via a sol-gel process with surfactant templating. Metal nanoparticles are introduced into the metal oxide nanostructure via wet impregnation.Type: ApplicationFiled: September 7, 2012Publication date: January 3, 2013Applicant: The Curators of the University of MissouriInventors: Shubhra Gangopadhyay, Daniel Tappmeyer, Andrey Bezmelnystin, Rajagopalan Thiruvengadathan, Rajesh Shende, Bhushan Mehendale, Steven Apperson, Syed Barizuddin, Keshab Gangopadhyay
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Patent number: 8333854Abstract: A process for the preparation of composite thermite particles, and thermite particles and consolidated objects formed from a plurality of pressed composite particles. The process includes providing one or more metal oxides and one or more complementary metals capable of reducing the metal oxide, and milling the metal oxide and the metal at a temperature below ?50° C., such as cryomilling, to form a convoluted lamellar structure. The average layer thickness is generally between 10 nm and 1 ?m. The molar proportions of the metal oxide and metal are generally within 30% of being stoichiometric for a thermite reaction.Type: GrantFiled: April 18, 2008Date of Patent: December 18, 2012Assignees: University of Central Florida Research Foundation, Inc., Lockheed Martin CorporationInventors: Kevin Coffey, Edward Dein, Dickson Hugus, Edward Sheridan
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Patent number: RE44386Abstract: A binary exploding target package, a process of forming an exploding target from the contents of the binary exploding target package, and the exploding target formed therefrom. The binary exploding target package includes a first, target container and a second container. An oxidizer composition is contained within one of the containers and a catalyst composition is contained within the other container. An exploding target is formed by mixing the oxidizer and catalyst compositions, and introducing the mixture into the target container to form an exploding target just prior to using the exploding target as a target for a shooting exercise.Type: GrantFiled: August 16, 2005Date of Patent: July 23, 2013Inventor: Daniel Jeremy Tanner