Patents Represented by Attorney Charles F. Bricker
  • Patent number: 6025439
    Abstract: Molecular dispersions of rigid-rod polybenzobisazole polymer/copolymer in thermoplastic matrices in a weight ratio of about 1:99 to 50:50 are prepared by dissolving the rigid-rod polymer in an alcoholic or aprotic solvent, dissolving the thermoplastic polymer in an alcoholic or aprotic solvent, combining the two solutions and recovering the resulting molecular composite from the combined solution. These molecular dispersions consist essentially of rigid-rod polybenzobisazole polymer/copolymer having sulfonic acid groups pendant to the polymer/copolymer backbone and thermoplastic polymers selected from the group consisting of polyvinylpyridines, poly(arylene ether ketone)s with a pyridyl functionality, aromatic poly(pyridine ether)s and poly(pyridine ether sulfone) copolymers, and polyimides with a pyridyl functionality.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: February 15, 2000
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Fred E. Arnold, Narayanan Venkatasubramanian, Thuy D. Dang, Derrick R. Dean
  • Patent number: 5867981
    Abstract: A solid rocket motor having a main propellant comprising glycidyl azide polymer, combustible solids and a plasticizer.
    Type: Grant
    Filed: January 28, 1985
    Date of Patent: February 9, 1999
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Joseph W. Lewis
  • Patent number: 4960858
    Abstract: There are provided aromatic heterocyclic polymers having repeating units of the formula ##STR1## wherein X is --S--, --O-- or --NH--.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: October 2, 1990
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Fred E. Arnold, Jerry L. Burkett
  • Patent number: 4960859
    Abstract: There are provided copolymers having repeating units of the formula ##STR1## wherein X is --S--, --O-- or --NH--; and wherein y ranges from about 0.02 to 0.20 and z is 1.0-y.
    Type: Grant
    Filed: October 25, 1989
    Date of Patent: October 2, 1990
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Fred E. Arnold, Jerry L. Burkett