Patents by Inventor Marguerite S. Chang

Marguerite S. Chang 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).

  • Extrusion method for obtaining high strength composite propellants
    Patent number: 4776993
    Abstract: A method of manufacturing composite propellants which include compounding e propellant with an extended final mix cycle, partially curing the propellant mixture to a specified hardness, and extruding the propellant under certain conditions.
    Type: Grant
    Filed: May 14, 1974
    Date of Patent: October 11, 1988
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Marguerite S. Chang, Richard K. Mackne, Anthony Mycka, Jr., Carl L. Myers, Jr.
  • Synthesis of dimethylmethylene dinitramine
    Patent number: 4476322
    Abstract: A process for preparing 2,4-dinitro-2,4-diazapentane by(1) nitrating dimethylurea to form dimethyldinitrourea;(2) hydrolyzing the dimethyldinitrourea to form methylnitramine;(3) reacting one mole of methylamine with one mole of formaldehyde in aqus solution to form 2-nitro-2-aza-1-propanol; and(4) reaction one mole of methylnitramine with each mole of 2-nitro-2-aza-1-propanol to form one mole of 2,4-dinitro-2,4-diazapentane.
    Type: Grant
    Filed: July 1, 1982
    Date of Patent: October 9, 1984
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Marguerite S. Chang, Robert R. Orndoff
  • Synthesis of dimethylmethylene dinitramine
    Patent number: 4418212
    Abstract: A process for preparing 2,4-dinitro-2,4-diazapentane by(1) nitrating dimethylurea to form dimethyldinitrourea;(2) hydrolyzing the dimethyldinitrourea to form methylnitramine;(3) reacting one mole of methylamine with one mole of formaldehyde in aqus solution to form 2-nitro-2-aza-1-propanol; and(4) reaction one mole of methylnitramine with each mole of 2-nitro-2-aza-1-propanol to form one mole of 2,4-dinitro-2,4-diazapentane.
    Type: Grant
    Filed: July 1, 1982
    Date of Patent: November 29, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Marguerite S. Chang, Robert R. Orndoff
  • Metal-cutting pyrotechnic composition
    Patent number: 4349396
    Abstract: A pyrotechnic composition, suitable for metal cutting, comprises an oxidi selected from the class consisting of calcium sulfate hemihydrate, anhydrous calcium sulfate, magnesium monohydrate, anhydrous magnesium sulfate, anhydrous strontium sulfate, and mixtures thereof; a metal fuel, a halopolymeric binder; and sulfur.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: September 14, 1982
    Assignee: The United Stated of America as represented by the Secretary of the Navy
    Inventors: Kurt F. Mueller, Marguerite S. Chang, Robert F. Farncomb, Lyle O. Malotky
  • Solid gas generating and gun propellant composition containing triaminoguanidine nitrate and synthetic polymer binder
    Patent number: 3954528
    Abstract: Solid gas generating and gun propellant compositions employing triaminogudine nitrate as a propellant ingredient in admixture with an oxidant and a suitable compatible binder material.
    Type: Grant
    Filed: November 6, 1970
    Date of Patent: May 4, 1976
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Marguerite S. Chang, John H. Highby, Gerald L. Mackenzie