Patents by Inventor Francisco Q. Roberto

Francisco Q. Roberto 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).

  • Solid propellant service life analysis via nondestructive testing
    Patent number: 5038295
    Abstract: A process for determining the aging characteristics of solid rocket propellant samples by measuring their dynamic mechanical properties is disclosed. Samples of rocket propellant are tested using a mechanical spectrometer at low strain levels and low frequencies. Since the dynamic storage modulus of a sample increases with aging time and aging temperature, it is an indicator of the acceptability of the propellant sample as a usable fuel source. The process allows a user to determine empirically the aging rate of a sample for each aging temperature with a nondestructive test procedure.
    Type: Grant
    Filed: December 28, 1989
    Date of Patent: August 6, 1991
    Assignee: The United States of America as represented by the secretary of the Air Force
    Inventors: David M. Husband, Francisco Q. Roberto
  • Method for improving metal combustion in solid rocket propellants
    Patent number: 4017342
    Abstract: A method for improving the ballistic properties of aluminum powder based rocket propellants by treating the aluminum powder with hydrogen fluoride gas prior to its incorporation into a propellant formulation.
    Type: Grant
    Filed: April 5, 1976
    Date of Patent: April 12, 1977
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Robert L. Geisler, Arnold M. Crelier, Francisco Q. Roberto
  • Fluorine generating solid formulation for use in chemical lasers
    Patent number: 4001135
    Abstract: A solid fluorine generating composition for use in a chemical laser which comprises a mixture of a xenon fluoride and a hydrocarbon or fluorohydrocarbon polymer.
    Type: Grant
    Filed: July 1, 1975
    Date of Patent: January 4, 1977
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: John E. O'Pray, Ronald E. Channell, Francisco Q. Roberto
  • Fluorine generating formulation for use in chemical lasers
    Patent number: 4001136
    Abstract: A solid propellant, gas generating formulation for use in providing gaseous reactants to a chemical laser. The formulation comprises a compressed powdered mixture of perfluoroammonium salts of the fluorinated Lewis acids, a metal nitride, and an alkali metal fluoride.
    Type: Grant
    Filed: July 1, 1975
    Date of Patent: January 4, 1977
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Ronald E. Channell, John E. O'Pray, Francisco Q. Roberto
  • Burning rate modifiers for solid propellants
    Patent number: 4000024
    Abstract: A solid propellant formulation which utilizes the addition of low levels of transition metal fluorides, such as cupric fluoride and ferric fluoride, as a modifying agent to increase the propellant burning rate while simultaneously decreasing its pressure exponent.
    Type: Grant
    Filed: October 17, 1975
    Date of Patent: December 28, 1976
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Francisco Q. Roberto, Arnold M. Crelier, Gary D. Lium