Patents Represented by Attorney J. O'Brien

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  • Polyaromatic ether-ketone-sulfones containing 1,3-butadiene units
    Patent number: 4356298
    Abstract: The acid chloride of 1,4-bis-p-carboxyphenyl-1,3-butadiene and isophthaloyl chloride were polymerized with 4,4-diphenoxy-diphenyl sulfone and diphenyl ether in a Friedel-Crafts type polymerization. The resulting polymers contained 5-20 mole % of butadiene units and were insoluble in all solvents.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: October 26, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Carl S. Marvel, Venkatesa Sankaran
  • Polyaromatic ether-keto-sulfones curable by Diels-Alder cycloaddition
    Patent number: 4356292
    Abstract: The acid chloride of bis-m-carboxyphenyl acetylene was copolymerized with a mixture of isophthaloyl chloride, diphenyl ether and 4,4'-diphenoxydiphenyl sulfone to produce novel polyaromatic ether-ketone-sulfones easily cured by a Diels-Alder cycloaddition reaction.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: October 26, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Venkatesa Sankaran, Carl S. Marvel
  • Method for synthesizing poly(carbonyl fluoride) oligomers
    Patent number: 4356070
    Abstract: F-3-Methylbutene-1 has been oxidized using oxygen and ultraviolet radiation to form poly(carbonyl fluoride) oligomers. The formation of fluoroformate terminated material is insignificant. This is in sharp contrast to the products derived from the prior art oxidation of F-propene (HFP) in which up to 60% fluoroformate terminated material was produced. F-Ethylene (TFE) can be added to the F-3-methylbutene-1 reaction gas stream without adversely affecting the product composition. The fluoride oligomers, after addition of one unit of hexafluoropropylene oxide, can be converted to s-triazines which have excellent properties as hydrualic fluids.
    Type: Grant
    Filed: June 17, 1981
    Date of Patent: October 26, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Keith B. Baucom
  • Low temperature braze alloy and composite
    Patent number: 4355084
    Abstract: This invention relates to an alloy for bonding gold-plated substrates together. In a more specific aspect, it relates to a braze alloy for bonding gold-plated lids to gold-plated seal rings or gold-plated Kovar substrates. In another aspect, it deals with a method for bonding gold-plated lids to gold-plated Kovar substrates.
    Type: Grant
    Filed: March 21, 1980
    Date of Patent: October 19, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Donald R. Kitchen
  • Method for increasing the ductility and conductivity of refractory crystals
    Patent number: 4349636
    Abstract: A method for imparting ductility and very high electrical conductivity to very brittle refractory single crystals by subjecting said crystals to a hydrostatic deformation technique at room temperature and at pressures of from about 5 to 25 kilobars.
    Type: Grant
    Filed: May 14, 1981
    Date of Patent: September 14, 1982
    Inventor: Fred W. Vahldiek
  • High energy solid propellant composition
    Patent number: 4337102
    Abstract: A system for improving the mechanical properties of high energy propellants utilizing solid poly(ethylene oxide) diol polymeric binders by adding minor amounts of soluble perchlorate salts to the propellant formulation.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: June 29, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Adolf E. Oberth, Howard A. Price
  • Swing disc nozzle structure for ramjet engine
    Patent number: 4327868
    Abstract: A ramjet, swing disc, variable nozzle structure with corrosive resistant, coated graphite inserts positioned within oppositely disposed recesses in the swing disc structure.
    Type: Grant
    Filed: May 29, 1979
    Date of Patent: May 4, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: William M. Burkes, Jr.
  • Face plate for cathode ray tube
    Patent number: 4327306
    Abstract: A cathode ray tube having a face plate composed of a plurality of boron fibers which act as a charge transfer medium to make signals accessible from the outside of the tube for further manipulation and processing.
    Type: Grant
    Filed: November 27, 1979
    Date of Patent: April 27, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Roy F. Stratton, Edward J. Calucci
  • Analysis of lubricating oils for iron content
    Patent number: 4324758
    Abstract: An apparatus for analyzing a used lubricating oil for iron wear metal content which comprises a series of containers, at least one of which is adapted for holding a test sample material while the remaining containers are adapted for holding 3 separate reagent sample materials. Also included are a reaction chamber, means for transferring the test sample material and the reagent materials from the series of containers to the reaction chamber which may also function as a test cell.
    Type: Grant
    Filed: April 18, 1980
    Date of Patent: April 13, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Kent J. Eisentraut, William D. Ross, William J. Hillan, Joseph J. Brooks, Thomas G. Duffy
  • Grease compositions based on fluorinated polysiloxanes
    Patent number: 4324671
    Abstract: An antirust, anticorrosion grease composition comprising a major amount of a fluorinated polysiloxane base fluid, a minor amount of a fluorocarbon polymer thickening agent, and a rust and corrosion inhibiting amount of a benzimidazole.
    Type: Grant
    Filed: February 10, 1981
    Date of Patent: April 13, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John B. Christian, Christ Tamborski
  • Diethynylbenzene-ethylnylpyrene copolymers
    Patent number: 4324830
    Abstract: A high char yielding matrix resin for use in fabricating carbon-carbon composites comprised of a polymerizable mixture of a diethynylbenzene monomer and an ethynylpyrene monomer.
    Type: Grant
    Filed: November 17, 1980
    Date of Patent: April 13, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Norman Bilow
  • Grease compositions based on polyfluoroalkylethers
    Patent number: 4324673
    Abstract: An antirust, anticorrosion grease composition comprising a major amount of a polyfluoroalkylether base fluid, a minor amount of a fluorocarbon polymer thickening agent, and a rust and corrosion inhibiting amount of a benzimidazole.
    Type: Grant
    Filed: January 16, 1981
    Date of Patent: April 13, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John B. Christian, Christ Tamborski
  • Perfluorocompounds
    Patent number: 4321359
    Abstract: A method for polymerizing octafluoronaphthalene and the resulting perfluorocompounds prepared therefrom. Polymerization is accomplished by reacting the octafluoronaphthalene monomer with a mono or difluoroxyperfluoroalkane.
    Type: Grant
    Filed: August 29, 1980
    Date of Patent: March 23, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Madeline S. Toy, Roger S. Stringham
  • Stable ultraviolet chemical filter
    Patent number: 4310215
    Abstract: A liquid chemical filter for suppressing the heat producing portion of the solar spectrum emanating from a simulated solar source and composed of a mixture a hydrochloric acid, cobalt sulfate and distilled water positioned between two ultraviolet transmitting fused silica windows.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: January 12, 1982
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Lawrence R. Kelley
  • Purification of acetylene-terminated polyimide oligomers
    Patent number: 4307220
    Abstract: A process for purifying an acetylene-terminated polyimide oligomer containing residual solvent in which the oligomer is initially dissolved in the same solvent used as the reaction medium in its synthesis. After precipitating the oligomer from solution by mixing with an aqueous solution of potassium or sodium chloride, the precipitated oligomer is washed successively with a plurality of liquids of decreasing polarity to provide an oligomer free of residual solvent.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: December 22, 1981
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Michael A. Lucarelli, Lewellyn G. Picklesimer
  • Unsymmetrical diphosphatetraazacyclooctatetraenes
    Patent number: 4297510
    Abstract: A method for preparing unsymmetrical diphosphatetraazacyclooctatetraenes and the novel products produced thereby. The synthesis involves an interaction between an imido-tetraaryl-diphosphinic acid trihalide and a perfluorinated imidoylamidine in the presence of an acid acceptor.
    Type: Grant
    Filed: June 26, 1980
    Date of Patent: October 27, 1981
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Kazimiera J. L. Paciorek, Reinhold H. Kratzer, Thomas I. Ito, James H. Nakahara
  • Energetic monopropellant
    Patent number: 4297152
    Abstract: An energetic liquid monopropellant comprising a mixture of bis (2,2-dinitropropyl) acetal; bis (2,2-dinitropropyl) formal; and bis (2,2,2-fluorodinitroethyl) formal.
    Type: Grant
    Filed: January 10, 1980
    Date of Patent: October 27, 1981
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Milton B. Frankel, Harry A. Arbit, Glen D. Artz, John C. Gray
  • High absorption coating
    Patent number: 4282290
    Abstract: A coating system characterized by a high degree of absorption of infrared energy and composed of a thin first layer of aluminum oxide, a thin, semitransparent second layer of titanium, a third dielectric layer of aluminum oxide and an opaque fourth layer of titanium.
    Type: Grant
    Filed: January 23, 1980
    Date of Patent: August 4, 1981
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Samuel F. Pellicori, Milton H. Monnier
  • Symmetrical diphosphatetraazacyclooctatetraenes
    Patent number: 4281185
    Abstract: A method for synthesizing symmetrical diphosphatetraazacyclooctatetraenes and the products produced thereby. The synthesis involves effecting a reaction between a diaryltrihalophosphorane of a perfluoroalkyl amidine in the presence of an acid acceptor.
    Type: Grant
    Filed: June 26, 1980
    Date of Patent: July 28, 1981
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Kazimiera J. L. Paciorek, Reinhold H. Kratzer, Thomas I. Ito, James H. Nakahara
  • Solvent mixture for dissolving and removing epoxy resinous compounds
    Patent number: 4278557
    Abstract: A solvent solution for dissolving and removing epoxy resinous formulations. The solution is composed of a mixture of methanol, dichloromethane and distilled water as essential components.
    Type: Grant
    Filed: April 15, 1980
    Date of Patent: July 14, 1981
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: John L. Elwell, Jr.