Patents Represented by Attorney R. D. Johnson
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Patent number: 4357185Abstract: An improved method of coating crystalline high explosives with polyethylene ax comprising:(a) forming a loose slurry of finely divided crystalline explosive particles in water;(b) adding an emulsion of(1) an emulsifiable polyethylene wax,(2) potassium stearate,(3) KOH, and(4) water to the slurry;(c) heating the slurry-emulsion mixture to a temperature in the range of from about 92.degree. C. to about 98.degree. C. with stirring;(d) adding enough acetic acid to the slurry-emulsion mixture to lower the pH to about 6 with stirring;(e) cooling the resulting solution; and(f) isolating the product polyethylene wax coated high explosive particles.Type: GrantFiled: May 20, 1981Date of Patent: November 2, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventor: Vernon D. Ringbloom
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Patent number: 4336283Abstract: An improved method of manufacturing articles containing carbon fibers when the fibers are temporarily plasticized to render them more flexible thereby permitting tortuous mechanical manipulation of the fibers to be carried out with little or no mechanical damage. The improvement comprises exposing the carbon fibers to agents capable of intercalating single crystals of graphite, such as bromine or iodine monochloride which have the effect of plasticizing the fibers by lowering their tensile modulus. While the fiber yarns are appreciably more flexible in the plasticized state, and have a higher elongation-at-break, on removal of the plasticizer they tend to return to their original state but retain a measurable degree of the shape imparted to them.Type: GrantFiled: August 16, 1976Date of Patent: June 22, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Leighton H. Peebles, Donald R. Uhlmann, Steven B. Warner
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Patent number: 4332744Abstract: Unsymmetrical carbonates of the formula ##STR1## are prepared by the following reaction sequence ##STR2## where R and R' can each be --CH.sub.2 C(NO.sub.2).sub.3, CH.sub.2 CF(NO..2).sub.2, --CH.sub.2 CF.sub.2 (NO.sub.2), --CH.sub.2 CCl(NO.sub.2).sub.2, --CH.sub.2 CF.sub.3, --CH.sub.2 CCl.sub.3, --CH.sub.2 C(NO.sub.2).sub.2 CH.sub.3, or --CH.sub.2 CF.sub.2 CF.sub.2 H, provided that R.noteq.R' and wherein R" is a lower alkyl group of from 1 to 6 carbon atoms.Also included are symmetrical 1,3-bis(halo- and nitroalkyl carbonyldioxy)-2,2-dinitropropanes of the formula ##STR3## which are synthesis by the following reaction sequence ##STR4## wherein R and R" are as defined above. The carbonates of this invention are useful as energetic additives to propellants and explosive.Type: GrantFiled: January 13, 1981Date of Patent: June 1, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: William H. Gilligan, Scott L. Stafford
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Patent number: 4327157Abstract: An alkaline nickel-zinc cell which has(1) a nickel-nickel hydroxide cathode;(2) a zinc-zinc oxide anode containing(a) a corrosion inhibitor such as PbO, SnO.sub.2, Tl.sub.2 O.sub.3, In(OHub.3, or mixtures thereof;(b) a slight corrosion accelerator such as CdO, Bi.sub.2 O.sub.3, Ga.sub.2 O.sub.3, or mixtures thereof; and(c) a zinc active material;(3) a mass-transport separator;(4) an alkaline electrolyte; and(5) means for charging the cell with an interrupted current having a frequency of from more than zero to 16 Hertz with a rest period of not less than 60 milliseconds.Another desirable feature is the use of a pressure-cutoff switch to terminate charging when the internal pressure of the cell reaches a selected value in the range of from 5 to 8 psig.Type: GrantFiled: February 20, 1981Date of Patent: April 27, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Albert Himy, Otto C. Wagner
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Patent number: 4323518Abstract: Bis(2,2-dinitropropyl)thionocarbonate, [CH.sub.3 C(NO.sub.2).sub.2 CH.sub.2 ].sub.2 C.dbd.S; bis(2,2,2-trinitroethyl)thionocarbonate, [C(NO.sub.2).sub.3 CH.sub.2 O].sub.2 C.dbd.S; and bis(2,2-difluoro-2-nitroethyl)thionocarbonate, [CF.sub.2 (NO.sub.2)CH.sub.2 O].sub.2 C.dbd.S are prepared by reacting one mole of 1,1'-thiocarbonyldi-1,2,4-triazole with 2 moles of 2,2-dinitropropanol, 2,2,2-trinitroethanol, or 2,2-difluoro-2-nitroethanol, respectively. These compounds are useful as explosives and as intermediates for the preparation of energetic explosives and plasticizers.Type: GrantFiled: February 17, 1981Date of Patent: April 6, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventor: William H. Gilligan
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Patent number: 4317928Abstract: N,N,N', N'-tetrakis(2-fluoro-2,2-dinitroethyl) oxamide, ##STR1## which is prepared by the following reaction sequence ##STR2## N,N,N',N'-tetrakis(2-fluoro-2,2-dinitroethyl) oxamide is a high density, ergetic explosive which is melt castable as well as thermally and hydrolytically stable.Type: GrantFiled: January 23, 1981Date of Patent: March 2, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Michael E. Sitzmann, William H. Gilligan
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Patent number: 4311649Abstract: N,N-Bis(2-fluoro-2,2-dinitroethyl) amine is reacted with methyl, ethyl, or -propyl chlorothiolformate in the presence of titanium tetrachloride to give the intermediate S-methyl, S-ethyl or S-propyl N,N-bis(2-fluoro-2,2-dinitroethyl) thiocarbamate (II), ##STR1## The thiocarbamate (II) is then refluxed with sulfuryl chloride to yield N,N-bis(2-fluoro-2,2-dinitroethyl) carbamyl chloride (I), ##STR2## which is useful as an explosive and as an intermediate for the synthesis of energetic explosive or propellant compounds.Type: GrantFiled: November 28, 1980Date of Patent: January 19, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: William H. Gilligan, Michael E. Sitzmann
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Patent number: 4308474Abstract: Grain-oriented polycrystalline or single crystal magnetostrictive materials n the general formula Tb.sub.x Dy.sub.1-x Fe.sub.2-w, Tb.sub.x Ho.sub.1-x Fe.sub.2-w, Sm.sub.x Dy.sub.1-x Fe.sub.x-w, Sm.sub.x Ho.sub.1-x Fe.sub.2-w, Tb.sub.x Ho.sub.y Dy.sub.z Fe.sub.2-w, or Sm.sub.x Ho.sub.y Dy.sub.z Fe.sub.2-w, wherein O.ltoreq.w.ltoreq.0.20, and x+y+z=1. X, y, and z are selected to maximize the magnetostrictive effect and the magnetomechanical coupling coefficient K.sub.33. These material may be used in magnetostrictive transducers, delay lines, variable frequency resonators, and filters.Type: GrantFiled: November 14, 1979Date of Patent: December 29, 1981Assignee: The United States of America as represented by the Secretary of the NavyInventors: Howard T. Savage, Arthur E. Clark, O. Dale McMasters
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Patent number: 4304613Abstract: A process for improving the shape change memory properties of a titanium-kel base alloy by (1) heat treating the alloy to convert the TiNi phase to CsCl (B2)-type crystal structure, (2) cold working the alloy to increase the micro-twining, and finally (3) thermal cycling the alloy through the transition temperature range (TTR) while a load is applied in order to improve the orientation of the micro-twins.Type: GrantFiled: May 12, 1980Date of Patent: December 8, 1981Assignee: The United States of America as represented by the Secretary of the NavyInventors: Frederick E. Wang, William J. Buehler
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Patent number: 4291171Abstract: Dimethyl 2,2,2-trinitroethylmalonate, diethyl 2,2,2-trinitroethylmalonate, imethyl 2-fluoro-2,2-dinitroethylmalonate, diethyl 2-fluoro-2,2-dinitroethylmalonate, dimethyl 2,2-dinitropropylmalonate, diethyl 2,2-dinitropropylmalonate, and methods of preparing these compounds. These compounds are useful as energetic additives to propellants and explosives.Type: GrantFiled: August 20, 1980Date of Patent: September 22, 1981Assignee: The United States of America as represented by the Secretary of the NavyInventors: Kurt Baum, Allen M. Guest
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Patent number: 4286988Abstract: Conventional Copper based antifouling paints are improved by adding from 01 to 20.0 weight percent based on the weight of the Cuprous ion source of an additive compound which(A) will give a positive acid test to litmus paper in distilled water;(B) is at least slightly soluble in sea water; and(C) does not react quickly with cuprous ions in sea water to produce precipitates.Type: GrantFiled: June 30, 1980Date of Patent: September 1, 1981Assignee: The United States of America as represented by the Secretary of the NavyInventors: Vincent J. Castelli, Eugene C. Fischer
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Patent number: 4283233Abstract: A method of changing the shape change transition temperature range (TTR) of an object made from a nickel-titanium based shape change memory alloy by selection of the final annealing temperature.Type: GrantFiled: March 7, 1980Date of Patent: August 11, 1981Assignee: The United States of America as represented by the Secretary of the NavyInventors: David Goldstein, Richard E. Jones, Robert S. Sery
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Patent number: 4282033Abstract: A method of producing homogeneous nickel-titanium base shape change memory lloys which includes the following steps in order:(1) converting a conventionally prepared nickel-titanium base shape change memory alloy into particles which are in the form of powder, shot, chips, or flakes;(2) blending or mixing the nickel-titanium base alloy particles;(3) melting the nickel-titanium base alloy particles; and(4) allowing the molten nickel-titanium base alloy to solidify into a desired shape.Type: GrantFiled: June 16, 1980Date of Patent: August 4, 1981Assignee: The United States of America as represented by the Secretary of the NavyInventors: David Goldstein, Scott Hoover
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Patent number: 4280409Abstract: A explosive device comprising:(1) a metal liner composed of a metal selected from the group consisting of luminum, magnesium, copper, and brass, the liner enclosing a chamber;(2) a liquid contained in the chamber;(3) a layer of pyrotechnic material surrounding the outside of the liner, the pyrotechnic material composed of a mixture of powders of(a) nickel;(b) metal oxide; and(c) an aluminum containing component which may be (i) aluminum or (ii) a mixture of from 50 to less than 100 weight percent of aluminum and from more than zero to 50 weight percent of a metal which can be magnesium, zirconium, bismuth, beryllium, boron, tantalum, copper, silver, niobium, or mixtures thereof;and(4) means for igniting the pyrotechnic material. This device is useful as an explosive, particularly as an underwater explosive.Type: GrantFiled: April 9, 1979Date of Patent: July 28, 1981Assignee: The United States of America as represented by the Secretary of the NavyInventors: Alexander G. Rozner, Horace H. Helms
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Patent number: 4260837Abstract: The production of 2,2',4,4',6,6'-hexanitrostilbene-I (HNS-I) having finely ivided particles of uniform size by dissolving HNS-II in hot fuming nitric acid and then drowning the HNS-nitric acid solution in water.Type: GrantFiled: March 3, 1980Date of Patent: April 7, 1981Assignee: The United States of America as represented by the Secretary of the NavyInventor: Joseph C. Dacons
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Patent number: 4219490Abstract: Ferrocenyl thiols of the formula ##STR1## wherein n is an integer of from 2 to 4 are prepared by reacting a compound f the formula ##STR2## with thioacetic acid, ##STR3## at elevated temperatures in the presence of a free radical initiator to produce a thiol ester of the formula ##STR4## and then hydrolyzing the thiol ester to produce the thiol. The thiols are useful as non-migrating burning rate modifiers for unsaturated rubber-based propellants.Type: GrantFiled: May 14, 1979Date of Patent: August 26, 1980Assignee: The United States of America as represented by the Secretary of the NavyInventor: Carl Gotzmer, Jr.
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Patent number: 4215190Abstract: An electrode grid comprising a sintered mat or felt of graphite fibers which are coated with a mixture of from about 85 to less than 100 weight percent of nickel and from more than zero to about 15 weight percent of phosphorous, the graphite fibers having a density greater than 1.8 gm/cm.sup.3. The grid is attached to an electrical connector and then impregnated with an active material such as nickel hydroxide or cadmium hydroxide to form an electrode.Type: GrantFiled: June 8, 1979Date of Patent: July 29, 1980Inventors: William A. Ferrando, Raymond A. Sutula
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Patent number: 4199532Abstract: A method of preparing 2,2',4,4',6,6'-hexanitrostilbene from 2,4,6-trinitrnzyl chloride and hydroxyl ions using an organic solvent-water two phase system and a phase transfer catalyst.Type: GrantFiled: December 5, 1978Date of Patent: April 22, 1980Assignee: The United States of America as represented by the Secretary of the NavyInventor: Isaac Angres
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Patent number: 4192908Abstract: A mass-transport separator for use in alkaline nickel-zinc cells which coises a barrier layer of a microporous membrane which contains a laminate of a material having a hydrogen overpotential in alkaline solution which is lower than that of zinc, the barrier layer being sandwiched between two protective layers of microporous polyolifin material.Type: GrantFiled: June 15, 1979Date of Patent: March 11, 1980Assignee: The United States of America as represented by the Secretary of the NavyInventors: Albert Himy, Otto C. Wagner
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Patent number: 4173591Abstract: A process for producing 1,3,5-trifluoro-2,4,6-trinitrobenzene by:(1) forming a mixture of fuming sulfuric acid and potassium nitrate wherein the fuming sulfuric acid is composed of at least 25 percent by weight sulfur trioxide, and wherein the molar ratio of fuming sulfuric acid to potassium nitrate is from about 2:1 to about 3:1;(2) adding 1,3,5-trifluorobenzene to the mixture until the molar ratio of potassium nitrate to 1,3,5-trifluorobenzene is from 6:1 to 10:1, the temperature of the mixture being maintained in the range of from about 30.degree. C. to about 50.degree. C. during the addition;(3) then raising the temperature of the mixture into the range of from about 140.degree. C. to about 160.degree. C. where it is maintained until the optimum yield of 1,3,5-trifluoro-2,4,6-trinitrobenzene has been obtained; and(4) isolating the product, 1,3,5-trifluoro-2,4,6-trinitrobenzene from the reaction mixture.Type: GrantFiled: August 28, 1978Date of Patent: November 6, 1979Assignee: The United States of America as represented by the Secretary of the NavyInventors: William M. Koppes, Horst G. Adolph, Michael E. Sitzmann