Patents Examined by Aileen B. Felton
  • Patent number: 11192831
    Abstract: A precursor formulation comprising, before curing, a hydroxyl-terminated polybutadiene (HTPB) prepolymer or a hydroxyl-terminated polyether (HTPE) prepolymer, an oxidizer, a dimer fatty diol, and an isocyanate curative. A solid propellant comprising a reaction product of the HTPB prepolymer or HTPE prepolymer, the dimer fatty diol, and the isocyanate curative is also disclosed, as is a rocket motor comprising a case and a solid propellant in the case, the solid propellant comprising the reaction product and an oxidizer. A method of reducing a burn rate of a solid propellant is also disclosed.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: December 7, 2021
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Robert S. Larson, Royce Beal
  • Patent number: 11186528
    Abstract: The invention relates to a cast explosive composition. There is provided a precure castable explosive composition comprising an explosive material, a polymerisable binder, said cross linking reagent comprising at least two reactive groups each of which is protected by a labile blocking group.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: November 30, 2021
    Assignee: BAE SYSTEMS PLC
    Inventors: Rebecca Elizabeth Stephens, Richard Stephen Arthur, Wayne Cord Hayes, Michael Edward Budd
  • Patent number: 11161795
    Abstract: The present invention provides a method for the preparation of an insensitive high enthalpy explosive Dihydroxylammonium 5,5?-bistetrazole-1,1?-diolate (TKX-50) in the presence of N,N-dimethylformamide, N,N-dimethylacetamide, or N-Methyl-2-pyrrolidone as a solvent via a four-step, one-pot reaction route to obtain a final product after four reaction steps. The more dangerous intermediate diazidoglyoxime may be solved by the one-pot method without the need of isolation. Further, the cyclization reaction is carried out in the presence of dropwisely added concentrated sulfuric acid to replace hydrochloric gas so no hydrochloric gas generator is needed to greatly reduce the amount of waste acid so as to effectively reduce the cost by avoiding using hydrochloric gas steel cylinders which require much safety equipment.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: November 2, 2021
    Assignee: National Chung-Shan Institute of Science and Technology
    Inventors: Chan-Yuan Ho, Tsair-Feng Lin, Yan-Lin Wang
  • Patent number: 11131530
    Abstract: An opto-thermal laser detonator uses resonantly absorptive tuned nano-material associated with secondary explosives for optical absorption and initiation by an integral laser diode. The opto-thermal laser detonator includes main explosive material; resonantly absorptive tuned nano-material; secondary explosive material, wherein the resonantly absorptive tuned nano-material and the secondary explosive material are associated to form associated material made of the resonantly absorptive tuned nano-material and the secondary explosive material; and a laser diode operatively connected to the associated material, wherein the laser diode initiates the associated material which in turn initiates the main explosive material.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: September 28, 2021
    Assignee: Lawrence Livermore National Security, LLC
    Inventor: Paul R. Wilkins
  • Patent number: 11125545
    Abstract: The present invention is a pyrotechnic time delay system that is improved over prior-art designs. Specifically, the system described herein comprises at least one delay element. The delay element or delay dements each have an input charge, a delay composition, and an output charge. Both the input charge and the output charge are igniter compositions and are comprised of the same components despite having different functional goals. The input charge and output charge compositions preferably contain titanium, manganese dioxide, and polytetrafluoroethylene. The delay composition may be modified from current formulations to include manganese and manganese dioxide, or tungsten and manganese dioxide. The system disclosed herein may be comprised of one delay element, or it may be modular wherein multiple delay elements are connected in series.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: September 21, 2021
    Assignee: U.S. Government as Represented by the Secretary of the Army
    Inventors: Anthony P. Shaw, Jay C. Poret, Lori J. Groven, Joshua Koenig, Jason Brusnahan
  • Patent number: 11124464
    Abstract: A high density, generally recognized as safe hybrid rocket motor is described which has a density-specific impulse similar to a solid rocket motor, with good performance approaching or equal to a liquid rocket motor. These high density hybrid motors resolve the packaging efficiency/effectiveness problems limiting the application of safe, low cost hybrid motor technology.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: September 21, 2021
    Assignee: Terves, LLC
    Inventors: Andrew J. Sherman, Brian Werry, Andrew Cortopassi, Eric Boyer
  • Patent number: 11124413
    Abstract: The present invention relates generally in gaseous oxygen propulsion systems with solid-phase chemical oxygen generation for in-space propulsion systems. Chemical oxygen generation is provided by alkali metal chlorates, alkali metal perchlorates or metal peroxides.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: September 21, 2021
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Shane Bucy Coogan, Michael A. Miller
  • Patent number: 11104620
    Abstract: A method for manufacturing nano-sized insensitive high explosive molding powder usable as a booster HE is provided herein. The method preferably involving the steps of dissolving a binder in a liquid and suspending crystalline high explosive to said liquid, grinding that suspension in a bead mill until the crystalline high explosive is nano-sized, and precipitating the binder and crystalline high explosive using a spray dryer to produce granules containing nano-sized crystalline high explosive. The liquid may be water or an organic solvent so long as the binder is highly soluble in the liquid and the crystalline high explosive is generally insoluble in the liquid. A fatty alcohol, water defoaming/dispersant/surfactant agent can be added to the dissolved binder/suspended crystalline high explosive, to aid in the manufacturability.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: August 31, 2021
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Rajen Patel, Victor Stepanov, Ashok Surapaneni, Anthony DiStasio, Hongwei Qiu
  • Patent number: 11054226
    Abstract: Embodiments of the present invention include a method for preparing and applying a slurry mixture to a bridge wire initiator which involves a slurry mixture that is relatively safer for a user to handle and in which the method is relatively less complex and shorter in duration for a user to prepare and apply the slurry mixture to the bridge wire initiator.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: July 6, 2021
    Assignee: ENSIGN-BICKFORD AEROSPACE & DEFENSE COMPANY
    Inventor: Marius Rosu
  • Patent number: 11053422
    Abstract: A chain-reactive, heat-generating microcapsule comprises a first compartment including a first component and a second compartment including a second component. An isolating structure separates the first and second compartments. The isolating structure may rupture when heated above a normal ambient temperature and/or in response to a compressive force. The first component reacts with the second component to produce heat. The microcapsule may further incorporate a blowing agent that responds to heating. In some embodiments, a core within the first compartment comprises a blowing agent material that responds to the heat produced when the first and second components react. The microcapsules can be incorporated into a material comprising a heat-curable resin precursor such that heat generated by the microcapsules can be used to cure the resin precursor.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: July 6, 2021
    Assignee: International Business Machines Corporation
    Inventors: Eric J. Campbell, Sarah K. Czaplewski, Joseph Kuczynski, Timothy J. Tofil
  • Patent number: 11008263
    Abstract: A reactive burning rate accelerator is provided that is configured to be at least partially embedded in a solid energetic material and comprises at least one metallic component and at least one non-metallic component. The reactive burning rate accelerator is configured to ignite and combust to increase the mass burning rate of the solid energetic material. Also provided are solid energetic materials comprising the reactive burning accelerator and methods of manufacturing and using the same.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: May 18, 2021
    Assignee: Purdue Research Foundation
    Inventors: Sarah Isert, Steven Forrest Son, Colin D. Lane, Ibrahim Emre Gunduz
  • Patent number: 11001540
    Abstract: The invention relates to a cast explosive composition, particularly to a pre-cure castable explosive composition comprising an explosive material, a polymerisable binder, a microencapsulated cross linking reagent, said microencapsulated cross linking reagent, comprising a cross linking agent encapsulated in a microcapsule.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: May 11, 2021
    Assignee: BAE SYSTEMS PLC
    Inventors: Rebecca Elizabeth Stephens, Richard Arthur, Wayne Cord Hayes, Michael Budd
  • Patent number: 10968147
    Abstract: The invention relates to a pyrotechnic agent containing at least one azotetrazolate as a component thereof.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: April 6, 2021
    Assignee: RUAG AMMOTEC GMBH
    Inventors: Ulrich Bley, Rainer Hagel, Julia Havlik, Aleksej Hoschenko, Peter Simon Lechner
  • Patent number: 10954324
    Abstract: What is disclosed is a method for preparing a catalyst system and a catalyst system for polymerizing or copolymerizing an ?-olefin. Catalyst component (A) is obtained by a process of reacting a magnesium complex (A-1) containing acid salts of group IB-VIIIB elements formed by contacting a magnesium halide with an acid salt solution of group IB-VIIIB metals or spherical particles adducts, an internal electron donor (A-2) of diester or diether or composite compounds, and a titanium compound (A-3). The catalyst compound (A) is contacted with a silicon compound (B) and an organoaluminium compound (C) to complete the catalyst system providing a good balance of catalyst performance in terms of activity and stereo-specificity.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: March 23, 2021
    Assignee: Formosa Plastics Corporation, U.S.A.
    Inventor: Demin Xu
  • Patent number: 10941085
    Abstract: An explosive sheet simulant that uses an ethylene vinyl acetate polymer combined with either a mixture of a boron carbide and iron oxide for X-ray attenuating properties or calcium carbonate for millimeter wave properties, wherein the components of the mixture are selected such that the sheet has a predetermined flexural modulus combined with particle density, effective atomic number, x-ray transmission properties, or millimeter wave properties.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: March 9, 2021
    Assignee: The Government of the United States of America, as represented by the Secretary of Homeland Security
    Inventors: Michael Brogden, Steve Duffy
  • Patent number: 10941086
    Abstract: A smoke producing method and device of the present disclosure produces a non-incendiary, organic-polymerization based, smoke-producing reaction. Some versions of the smoke are effective carriers for capsaicinoid compounds. The method of generating smoke comprises initiating a frontal polymerization reaction by heating a composition comprising a monomer compound that exothermically polymerizes upon initiation with an initiator compound and an initiator compound that initiates polymerization of the monomer compound present at a mass concentration that is at least five percent of the mass concentration of the monomer compound. The polymerization of the monomer compound is exothermic, and in one embodiment the concentration of initiator compound is at least five percent of the concentration of monomer compound. The smoke mainly comprises thermal decomposition products of the initiator compound.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: March 9, 2021
    Assignee: KNOWFLAME, INC.
    Inventors: R Michael Banish, Peter S Erbach
  • Patent number: 10927048
    Abstract: A method of preparing gunpowder includes selecting a known combination of chemicals used in making gunpowder; mixing the known combination of chemicals and a measurement of liquid ammonia at a predetermined temperature; stirring the chemicals and liquid ammonia with a laboratory mechanical stirrer, causing the chemicals to blend at a molecular level; raising the temperature of the mixture, causing the liquid ammonia to evaporate from the mixture, while keeping the mixture significantly below ignition temperature; allowing the remaining mixture to warm, thereby reducing the risk of ignition; and resulting in a fine gunpowder mixture, with no water content and limited recrystallization of the chemicals.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: February 23, 2021
    Inventor: Thomas Edward Hays
  • Patent number: 10919266
    Abstract: An explosion protection system comprises the steps of providing a fire extinguishing chemicals which under heat from explosion will decompose to absorb heat and releasing fire extinguishing gases which create a gas barrier against explosion; providing blast suppression chemicals which provide attenuation of shock resulting from an explosion; and providing a reinforcement layer on the object to be protected, the reinforcement layer providing impact and tensile strength materials and supporting the fire extinguishing chemicals and blast suppression chemicals including means for blocking gases released by an explosion.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: February 16, 2021
    Inventor: Felix A Dimanshteyn
  • Patent number: 10919818
    Abstract: A gas generator 10 includes a composition that contains a nonmetal perchlorate such as ammonium perchlorate as a first oxidizer, a secondary metal nitrate oxidizer such as strontium nitrate or sodium nitrate, a first fuel such as maleic hydrazide and salts thereof, and a second nitrogen-containing fuel such as nitroguanidine or guanidine nitrate. Gas generating systems 180 such as vehicle occupant protection systems 180, containing the gas generator 10, are also provided.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: February 16, 2021
    Assignee: Joyson Safety Systems Acquisition LLC
    Inventor: Scott M. Rambow
  • Patent number: 10913692
    Abstract: A reduced toxicity pyrotechnic strobe composition and method includes creating a mixture of strontium nitrate, magnalium, sulfur, and no more than 10 parts by weight of a nitrocellulose binder. The strontium nitrate may comprise 27 percent of the mixture. The magnalium may comprise a 50:50 blend of magnesium and aluminum. The magnalium may comprise 18 percent of the mixture. The sulfur may comprise 55 percent of the mixture. The mixture may include a pulse rate of approximately one pulse per minute. The method may further include modifying the pulse rate of the mixture. The method may further include using a reduced particle size of the magnalium. The method may further include substituting no more than 12.5% of the strontium nitrate with potassium nitrate.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: February 9, 2021
    Assignee: America as Represented by the Secretary of the Army
    Inventors: Amee W LaBonte, Michael F Kauzlarich