Patents by Inventor James D. Martin
James D. Martin 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: 9914734Abstract: Propellant compositions containing cyclic nitramines that are susceptible to unintentional detonation are desensitized by the incorporation of a linear nitramine having a backbone containing one to three ethylene groups and one or two nitramine groups.Type: GrantFiled: April 14, 2010Date of Patent: March 13, 2018Assignee: AEROJET ROCKETOYNE, INC.Inventors: James D. Martin, Edward O. Hosey, Scott K. Dawley
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Publication number: 20120111460Abstract: Propellant compositions containing cyclic nitramines that are susceptible to unintentional detonation are desensitized by the incorporation of a linear nitramine having a backbone containing one to three ethylene groups and one or two nitramine groups.Type: ApplicationFiled: April 14, 2010Publication date: May 10, 2012Applicant: Aero-Jet-General CorporationInventors: James D. Martin, Edward O. Hosey, Scott K. Dawley
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Patent number: 7028641Abstract: A rigid animal tether assembly comprises a rigid outwardly extending tie section and a rigid, hollow inwardly extending tilt section. The tie section includes tie elements for tethering an animal at a distal end section thereof and being connected at an opposing coupling end section thereof to an open outer end of the tilt section. A base structure includes base surface configuration that contiguously mates with an open inner end of the rigid tilt section. The coupling end section of the rigid tie section includes a biasing member for connecting the coupling end section inside the tilt section for drawing the rigid tie section and rigid, hollow tilt section under tension in a direction towards the base surface configuration.Type: GrantFiled: February 18, 2004Date of Patent: April 18, 2006Inventor: James D. Martin
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Patent number: 6984273Abstract: Nondetonable, or low detonation sensitivity, substantially nontoxic liquid monopropellants are provided. The liquid propellants are formed from aqueous solutions of solid oxidizers in liquid oxidizers and water soluble liquid fuels and formulated to have a freezing point less than ?10° C. Liquid oxidizers may be inorganic or organic aqueous solutions, with hydrogen peroxide being preferred. Preferred solid oxidizers are water soluble nitrates including ammonium dinitramide, aminoguanidine dinitrate, ammonium nitrate, hydroxylamine nitrate, hydrazine nitrate, guanidine nitrate and aminoguanidine nitrate. Preferred liquid fuels are water soluble alcohols, amines and amine nitrates, hydroxyethyl hydrazine, hydroxyethylhydrazine nitrate, cyanoguanidine, guanidines, aminoguanidines, triaminoguanidines, and their nitrate salts, ethanolamine dinitrate, ethylenediamine dinitrate, polyvinyl nitrate, and aziridine.Type: GrantFiled: July 29, 1999Date of Patent: January 10, 2006Assignee: Aerojet-General CorporationInventors: James D Martin, Norman H Lundstrom, Robert S. Scheffe
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Patent number: 6790382Abstract: An inorganic liquid or glass of hybrid composition including an inorganic component; and a template component, wherein the inorganic component and the template component are present in composition in a ratio that provides an intermediate range structural order to the composition. The intermediate range structural order results in the formation of metallotropic liquid crystals and anisotropic glasses. Methods of preparing the composition are also disclosed.Type: GrantFiled: March 17, 2003Date of Patent: September 14, 2004Assignee: North Carolina State UniversityInventors: James D. Martin, Todd A. Thornton
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Patent number: 6736912Abstract: A solid combustible composition for use in solid fuel air-augmented rocket engines which very substantially increases the temperature efficiency of afterburner fuel combustion with ram air, thereby greatly increasing engine performance. The improvement comprises dispersing in a matrix comprising the solid, fuel-rich organic compositions conventionally utilized in air-augmented rockets, particles containing solid oxidizable element and fluorine oxidizer compound which reacts with the element to produce gaseous subfluoride compound.Type: GrantFiled: March 24, 1977Date of Patent: May 18, 2004Inventors: Jerry L. Fields, James D. Martin
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Publication number: 20030183804Abstract: An inorganic liquid or glass of hybrid composition including an inorganic component; and a template component, wherein the inorganic component and the template component are present in composition in a ratio that provides an intermediate range structural order to the composition. The intermediate range structural order results in the formation of metallotropic liquid crystals and anisotropic glasses. Methods of preparing the composition are also disclosed.Type: ApplicationFiled: March 17, 2003Publication date: October 2, 2003Inventors: James D. Martin, Todd A. Thornton
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Patent number: 6540939Abstract: An inorganic liquid or glass of hybrid composition including an inorganic component; and a template component, wherein the inorganic component and the template component are present in composition in a ratio that provides an intermediate range structural order to the composition. The intermediate range structural order results in the formation of metallotropic liquid crystals and anisotropic glasses. Methods of preparing the composition are also disclosed.Type: GrantFiled: July 21, 2000Date of Patent: April 1, 2003Assignee: North Carolina State UniversityInventors: James D. Martin, Todd A. Thornton
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Patent number: 6361631Abstract: Liquid monopropellants for passive vehicle restraint systems (e.g., air bags) include an aqueous solution of a water-soluble oxidizer and a water-soluble organic fuel miscible with the oxidizer. The oxidizer is most preferably ammonium nitrate, hydrogen peroxide or nitric acid, while the fuel is a lower alcohol such as methanol, ethanol, propanol or glycerol. The liquid monopropellants will advantageously have an oxidation ratio (OR) of greater than about 0.90.Type: GrantFiled: May 22, 2001Date of Patent: March 26, 2002Assignee: Atlantic Research CorporationInventors: Robert S. Scheffee, James D. Martin
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Patent number: 6340401Abstract: An improved thermally stable, storage stable gas generating composition characterized by both an increased burning rate and a decreased pressure exponent for producing a clean, nontoxic, substantially ash- and solids-free gas for inflating inflatable structures such as vehicle airbags is provided. Optimum combustion efficiencies and operating pressures are achieved in the improved gas generating composition by adding an effective amount of a copper or copper compound catalyst to a gas generating composition that is preferably a eutectic mixture or solid solution of ammonium nitrate, at least one highly oxygenated fuel, potassium or cesium perchlorate or nitrate and an optional binder.Type: GrantFiled: February 7, 2000Date of Patent: January 22, 2002Assignee: Atlantic Research CorporationInventors: Brian K. Wheatley, James D. Martin, Robert D. Lynch
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Patent number: 6334961Abstract: Solid gas generant compositions produce low particulates (e.g., condensed ash) when ignited. The solid gas generant compositions most preferably include a nitramine, at least one oxidizer selected from nitrates of strontium or cerium, in admixture with or without potassium perchlorate, and a binder. Graphite may optionally be employed. The gas generant compositions are usefully employed in inflatable vehicle occupant passive restraint systems (e.g., air bag systems).Type: GrantFiled: November 9, 1999Date of Patent: January 1, 2002Assignee: Atlantic Research CorporationInventors: Brian K. Wheatley, Norman H. Lundstrom, Robert D. Lynch, R. Stephen Scheffee, James D. Martin
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Publication number: 20010025677Abstract: Liquid monopropellants for passive vehicle restraint systems (e.g., air bags) include an aqueous solution of a water-soluble oxidizer and a water-soluble organic fuel miscible with the oxidizer. The oxidizer is most preferably ammonium nitrate, hydrogen peroxide or nitric acid, while the fuel is a lower alcohol such as methanol, ethanol, propanol or glycerol. The liquid monopropellants will advantageously have an oxidation ratio (OR) of greater than about 0.90.Type: ApplicationFiled: May 22, 2001Publication date: October 4, 2001Applicant: Atlantic Research CorporationInventors: Robert S. Scheffee, James D. Martin
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Patent number: 6277296Abstract: Fire suppressant compositions which are substantially free of ammonium nitrate and which comprise potassium nitrate in an amount sufficient to generate at least about 10 wt. % potassium carbonate when combusted. Most preferably, a guanidine salt, such as guanidine nitrate, is used in combination with the potassium nitrate. The compositions employed in the present invention have low pressure exponents, high burning rates and low flame temperatures.Type: GrantFiled: November 30, 1999Date of Patent: August 21, 2001Assignee: Atlantic Research CorporationInventors: Robert S. Scheffee, Jamie B. Neidert, Robert E. Black, III, Robert D. Lynch, James D. Martin
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Patent number: 6228192Abstract: A family of Class 1.3 propellant compositions comprising nitrocellulose, at least one of a selected group of plasticizing nitrate esters, a thermal stabilizer, carbon and an energetic solid, and a method of making the family of propellant compositions is provided.Type: GrantFiled: April 20, 1999Date of Patent: May 8, 2001Assignee: Altantic Research CorporationInventors: Jamie B. Neidert, Robert S. Scheffee, Gary T. Bowman, James D. Martin
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Patent number: 6136113Abstract: An improved thermally stable, storage stable gas generating composition characterized by both an increased burning rate and a decreased pressure exponent for producing a clean, nontoxic, substantially ash- and solids-free gas for inflating inflatable structures such as vehicle airbags is provided. Optimum combustion efficiencies and operating pressures are achieved in the improved gas generating composition by adding an effective amount of a copper or copper compound catalyst to a gas generating composition that is preferably a eutectic mixture or solid solution of ammonium nitrate, at least one highly oxygenated fuel, potassium or cesium perchlorate or nitrate and an optional binder.Type: GrantFiled: August 7, 1998Date of Patent: October 24, 2000Assignee: Atlantic Research CorporationInventors: Brian K. Wheatley, James D. Martin, Robert D. Lynch
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Patent number: 6045726Abstract: A fire suppressant composition is provided which exhibits a low pressure and low flame temperature. The composition comprises ammonium nitrate and a guanidine salt or derivative which produces greater than 3 moles of inert gas per 100 grams of composition and alkali metal or alkaline earth salts for flame suppression. The composition may also include iron or iron oxide.Type: GrantFiled: July 2, 1998Date of Patent: April 4, 2000Assignee: Atlantic Research CorporationInventors: Edna M. Williams, Brian K. Wheatley, Jamie B. Neidert, Robert D. Lynch, James D. Martin
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Patent number: 5885542Abstract: Disclosed herein is a novel class of halide-based framework solids based on a Zn.sub.n Cl.sub.2n parentage, as zeo-types are related to Si.sub.n O.sub.2n. These materials, referred to as halo zeo-type materials, constructed from Lewis acidic and redox active tetrahedral building blocks, should augment the size and shape selectivity characteristics of zeolites. One example of these materials, compound CZX-1, has the formula ?NH(CH.sub.3).sub.3 !CuZn.sub.5 Cl.sub.12. Another example of these materials, compound CZX-2, has the formula ?NH.sub.2 (CH.sub.2 CH.sub.3).sub.2 !CuZn.sub.5 Cl.sub.12. Compound CZX-3 has the formula ?H.sub.2 N(CH.sub.3).sub.2 !.sub.n ?Cu.sub.n Zn.sub.6-n Cl.sub.12 !, wherein n may be 1 or 2. Compound CZX-4 has the formula ?A!.sub.n ?Cu.sub.2 Zn.sub.2 Cl.sub.7 !, wherein A may be H.sub.3 NCH.sub.3.sup.+ or Rb.sup.+. The invention also relates to colloidal suspensions which may utilize the halide-based compounds.Type: GrantFiled: August 21, 1997Date of Patent: March 23, 1999Assignee: North Carolina State UniversityInventors: James D. Martin, Kevin Greenwood
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Patent number: 5876637Abstract: A system for displaying luminescence comprises a crystalline structure comprising a compound having the formula:.alpha.-CuAlX.sub.4wherein the compound has lattice parameters a=b ranging from 5.430(1) .ANG. to 5.751(3) .ANG.; c ranging from 10.069(1) .ANG. to 10.570(4) .ANG.; and X is selected from the group consisting of chlorine, bromine, and a mixture thereof. The crystalline structure may also include a compound of the formula:.beta.-CUAlCl.sub.4wherein the compound has lattice parameters a=7.635(2) .ANG., b=12.842(2) .ANG., and c=6.127(1) .ANG.. The system also includes an excitation source which transmits energy to the crystalline structure such that the crystalline structure displays luminescence. The crystalline structure is also useful in a gas sensor application since the luminescence of the crystalline structure is capable of being quenched in the presence of gaseous material.Type: GrantFiled: August 20, 1996Date of Patent: March 2, 1999Assignee: North Carolina State UniversityInventor: James D. Martin
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Patent number: 5734123Abstract: A gas-generating composition for inflating inflation devices such as air bags, life rafts, slide chutes, and the like which comprises an oxidizer component, cellulose acetate and plasticizer. The cellulose acetate and plasticizer provides a binder system which does not produce hazardous compounds upon combustion. Molded articles can be formed by injection molding or extruding the composition.Type: GrantFiled: October 3, 1995Date of Patent: March 31, 1998Assignee: Atlantic Research CorporationInventors: Brian K. Wheatley, James D. Martin
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Patent number: 5589141Abstract: Particulate-free non-toxic gases are generated in a hybrid generator device by conducting the ignition of the propellant with an effective oxidizer, using a mixture of a molecular oxygen-containing gas and argon by varying the ratio of said gas to argon to provide only non-toxic reaction products in the exhaust gas.Type: GrantFiled: July 28, 1995Date of Patent: December 31, 1996Assignee: Atlantic Research CorporationInventors: James R. Sides, James D. Martin, Robert S. Scheffee