Patents Represented by Attorney Charles E. Bricker
  • Patent number: 5066769
    Abstract: There is provided a para-ordered, rigid-rod aromatic heterocyclic copolymer having repeating groups of the formula:--Ba--Ar).sub.x (Ba--Fl).sub.1.0-xwherein x has a value of 0.50 to 0.99, Fl is a 2,7-fluorene moiety, Ar is a para-ordered arylene group and Ba is a benzazole group of the formula: ##STR1## wherein Y is S or O.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: November 19, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Robert C. Evers, My Dotrong
  • Patent number: 5041522
    Abstract: There are provided novel rod-like heterocyclic aromatic polymers having repeating groups of the formula: ##STR1## wherein Y is --S--, --O-- or --NR--, R is --H, an alkyl group having 1 to 4 carbon atoms or an aromatic group having 1 or 2 aromatic rings, and the bullet symbol (.cndot.) indicates hydrogen bonding.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: August 20, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Thuy D. Dang, Hoe H. Chuah, Loon S. Tan, Fred E. Arnold
  • Patent number: 5041531
    Abstract: A process for preparing polyepichlorohydrin which comprises polymerizing epichlorohydrin in the presence of a catalytic amount of 1,4-butaneditriflate. The resulting polymer can have a molecular weight of about 5,000 to about 15,000. The polymer is telechelic. It can be terminated with a broad variety of functional groups.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: August 20, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Chung S. Kim
  • Patent number: 5039356
    Abstract: An improved process for producing near-alpha and alpha+beta titanium alloy axisymmetric components with high fatigue resistance which comprises the steps of:(a) providing a beta processed near-alpha or alpha+beta titanium alloy component;(b) torque deforming the component; and(c) alpha+beta recrystallization annealing the resulting torque-deformed component.
    Type: Grant
    Filed: August 24, 1990
    Date of Patent: August 13, 1991
    Assignee: The United States of America as Represented by the Secretary of the Air Force
    Inventors: Isaac Weiss, Daniel Eylon, Gerhard E. Wesch, Francis H. Froes
  • Patent number: 5039778
    Abstract: There are provided novel rod-like heterocyclic aromatic copolymers having repeating groups of the formula: ##STR1## wherein n has a value of 0.01 to 0.50, wherein Ar is a para-oriented aromatic group and Q is an aromatic heterocyclic group of the formula: ##STR2## wherein Y is --S--, --O-- or --NR--, wherein R is selected from the group consisting of --H, alkyl having 1 to 4 carbon atoms, and aromatic having 1 or 2 aromatic rings.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: August 13, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Thuy D. Dang, Hoe H. Chuah, Loon S. Tan, Fred E. Arnold
  • Patent number: 5032189
    Abstract: Near-alpha and alpha+beta titanium alloy components are produced by a process which comprises the steps of forging an alloy billet to a desired shape at a temperature at or above the beta-transus temperature of the alloy to provide a forged component, heat treating the forged component at a temperature approximately equal to the beta-transus temperature of the alloy, cooling the component at a rate in excess of air cooling to room temperature, annealing the component at a temperature in the approximate range of 10 to 20% below said beta-transus temperature for about 4 to 36 hours, and air cooling the component to room temperature.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: July 16, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Daniel Eylon, Francis H. Froes
  • Patent number: 5030277
    Abstract: A method for fabricating a titanium aluminide composite structure consisting of a filamentary material selected from the group consisting of silicon carbide, silicon carbide-coated boron, boron carbide-coated boron, titanium boride-coated silicon carbide and silicon-coated silicon carbide, embedded in an alpha-2 titanium aluminide metal matrix, which comprises the steps of providing a first beta-stabilized Ti.sub.3 Al powder containing a desired quantity of beta stabilizer, providing a second beta-stabilized Ti.sub.3 Al powder containing a sacrificial quantity of beta stabilizer in excess of the desired quantity of beta stabilizer, coating the filamentary material with the second powder, fabricating a preform consisting of the thus-coated filamentary materials surrounded by the first powder, and applying heat and pressure to consolidate the preform.The composite structure fabricated using the method of this invention is characterized by its lack of a denuded zone and absence of fabrication cracking.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: July 9, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Daniel Eylon, William C. Revelos, Paul R. Smith, Jr.
  • Patent number: 5024369
    Abstract: Processes for producing titanium alloy SPF/DB components, particularly structural panels, are provided.In one embodiment, the process comprises providing rapidly solidified titanium alloy sheetstock, providing a plurality of rapidly solidified titanium alloy ribbons or strips, forming the ribbons into waveform structures, assembling a plurality of these waveform structures to produce a honeycomb core, positioning this core between face sheets, and bonding the core to the face sheets.In another embodiment the process comprises providing rapidly solidified titanium alloy sheetstock, superplastically forming at least one piece of sheetstock into a shaped piece having spaced apart, parallel bonding regions, positioning this shaped piece between two face sheets, and bonding the shaped piece to each face sheet.
    Type: Grant
    Filed: May 5, 1989
    Date of Patent: June 18, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Francis H. Froes, Daniel Eylon
  • Patent number: 5021517
    Abstract: A process for fabricating rod-like aromatic heterocyclic polymer-reinforced composite materials into shaped articles which comprises the steps of:(a) dissolving a rigid-rod aromatic heterocyclic polymer and a flexible, coil-like thermoplastic polymer in a common solvent at a concentration less than the critical concentration point of the solution;(b) extruding the solution resulting from step (a) into a liquid bath for removing the solvent;(c) placing the extrudate from step (b), in the liquid-wet state, into a mold, and consolidating the extrudate in the mold to provide a molded article;(d) drying the molded article resulting from step (c); and(e) compression molding the article to provide a fully consolidated, solid article.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: June 4, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Chyi-Shan Wang, Ivan J. Goldfarb, Thaddeus E. Helminiak
  • Patent number: 5015188
    Abstract: A two dimensional or flat image display format for showing on an aircraft pilot's helmet mounted display the position of the aircraft relative to other aerial objects in three dimensional space is disclosed. The display format switches, under pilot control, among a variety of different, primarily three dimensional perspective, views. The disclosed views include a generally top-down first view from above the primary object showing the primary object generally at the center of said first view surrounded by the one or more other objects; a generally behind-forward perspective second view from behind the primary object showing the primary object generally at the center of said second view surrounded by the one or more other objects; and, a generally inside out third view from the primary object at the center of said third view showing those one or more other objects surrounding the primary object that are generally inside a solid angle defined by said third view.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: May 14, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John C. Pellosie, Jr., Michael W. Haas, Kenneth Aldrich
  • Patent number: 5015506
    Abstract: A method for preparing an aluminum surface for adhesive bonding which conts essentially of the steps of:(a) preparing an aqueous solution of an epoxy-functional silane;(b) degreasing a selected area of the surface;(c) wet abrading the selected area using the aqueous epoxy silane solution;(d) removing any residue from the selected area;(e) allowing the surface to air dry;(f) wiping an alcoholic solution of an amino-functional silane onto the selected area; and(g) allowing the surface to air dry.
    Type: Grant
    Filed: September 7, 1990
    Date of Patent: May 14, 1991
    Assignee: United States of America as Represented by the Secretary of the Air Force
    Inventor: William M. Purcell
  • Patent number: 5015305
    Abstract: A method for refining the microstructure and enhancing the processability of titanium aluminum alloys containing about 45 to 55 atomic percent aluminum which comprises the steps of:(a) rapidly solidifying a titanium aluminum alloy containing about 45 to 55 atomic percent aluminum in a hydrogen-containing atmosphere to provide a hydrogenated, rapidly solidified material having at least one dimension not greater than about 100 micrometers, and;(b) diffusing hydrogen out of the hydrogenated solid material.
    Type: Grant
    Filed: February 2, 1990
    Date of Patent: May 14, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Francis H. Froes, Simon D. Shong
  • Patent number: 5008346
    Abstract: A fusible, rod-like, graft copolymer having repeating units of the formula: ##STR1## wherein X is (--CH.sub.2 CH.sub.2 CONH--).sub.m or (--CH.sub.2 --CH(CH.sub.3)--O--).sub.n, wherein m has an average value of 5.0 to 35.0 and n has an average value of 1.0 to 30.0.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: April 16, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Robert C. Evers, Thuy D. Dang, D. Roger Moore
  • Patent number: 5003050
    Abstract: A water-soluble luminescent compound having repeating units of the formula: ##STR1## The product, which is a polymer having repeating units comprising diazo-linked luminol and hydroxyindole, is referred to as diazoluminomelanin (DALM), since one of the precursors to this product, 3-amino-L-tyrosine (3AT) is closely related to the biological substrates which are converted into melanin.Also provided is a method for preparing DALM which comprises reacting 3AT with an alkali metal nitrite, and reacting the resulting diazonium salt with luminol.DALM can be used for chemiluminescent immunoassays for biological and chemical agents; in radiofrequency and ionizing radiation dosimeters; and for RNA/DNA hybridization assays for viruses and genetic detection.
    Type: Grant
    Filed: March 7, 1990
    Date of Patent: March 26, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Johnathan L. Kiel, Gerald J. O'Brien
  • Patent number: 5003035
    Abstract: There are provided para-ordered aromatic heterocyclic copolymers having repeating groups of the following formulas: ##STR1## wherein a, b, c, d, and e are positive integers, each representing an average number of the respective different recurring units present in the repeating group, m and n are 1 or 2, R and R' are alkyl groups having 1 to 4 carbon atoms, and Q is a benzobisazole group of the formula: ##STR2## wherein Y is --O--, --S--, or --NH--. In the copolymers wherein m or n is 2, the R or R' groups can be the same or different. In copolymer I, the ratio a:b can be about 1:1 to 99:1. In copolymer II, the ratio c:(d+e) can be about 1:1 to 99:1, and the ratio d:e can be aobut 1:99 to 99:1.
    Type: Grant
    Filed: July 13, 1989
    Date of Patent: March 26, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Tsu-Tzu Tsai, Fred E. Arnold
  • Patent number: 5001217
    Abstract: There are provided crosslinkable, para-ordered aromatic heterocyclic polymers having repeating groups of the following formula ##STR1## wherein Y is --O--, --S--, or --NH--, n is 1 or 2, and R is an alkyl group having 1 to 4 carbon atoms. In polymers having two pendant R groups, the R groups can be the same or different.
    Type: Grant
    Filed: July 13, 1989
    Date of Patent: March 19, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Tsu-Tzu Tsai, Fred E. Arnold
  • Patent number: 5000885
    Abstract: Solid propellant test strands are inhibited, i.e., prevented from burning in an uncontrolled fashion, by coating the strands with a liquid composition containing a partially cured phenolformaldehyde in a volatile solvent, then volatizing the solvent.
    Type: Grant
    Filed: May 7, 1987
    Date of Patent: March 19, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Janet L. Laird, Roger J. Becker, Ival O. Salyer
  • Patent number: 4994123
    Abstract: A physically stable emulsion explosive composition consisting of a dispersed phase and a continuous phase, wherein the dispersed phase consists essentially of at least one oxidizing compound and at least one fuel compound, and wherein the continuous phase consists essentially of a polyacrylate resin.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: February 19, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Michael A. Patrick, Sara J. Massey
  • Patent number: 4985094
    Abstract: A castable, thermoplastic composite rocket propellant comprising about 3 to 10 wt % of a thermoplastic elastomer, about 3 to 20 wt % of a plasticizer, balance energetic particulates is provided.Also provided is a process for producing a thermoplastic composite rocket propellant which comprises melt blending a thermoplastic elastomer and about 100 to 300 phr (parts by weight per 100 parts by weight of rubber (elastomer)) plasticizer, adding energetic particulates to the melt, with mixing, and casting the mixture in a suitable mold.
    Type: Grant
    Filed: March 7, 1990
    Date of Patent: January 15, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Boris D. Nahlovsky, Gilbert A. Zimmerman
  • Patent number: H887
    Abstract: A titanium alloy comprising about 15 to 25 atomic percent (a/o) aluminum, about 0.05 to 12 a/o of at least one beta eutectoid stabilizing element and about 4 to 12 a/o of at least one beta isomorphous stabilizing element, balance titanium. The beta eutectoid element is at least one of Cu, Ni, Cr, Er, Y, Ce, Si, B or C. The beta isomorphous stabilizing element is Nb or a mixture of Nb with Ta, Mo or V, wherein the Nb can be replaced by Ta, Mo or V up to about half of the stated quantity.The presently preferred amounts of the beta eutectoid stabilizing elements are as follows: Cu, Ni or Cr, about 4.50 to 12.0 a/o; Si, B or C, about 0.70 to 5.0 a/o; Er, Y or Ce, about 0.05 to 0.25 a/o.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: February 5, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Ganapathy Venkataraman, Francis H. Froes