Patents by Inventor Ductri H. Nguyen

Ductri H. Nguyen 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).

  • Lithographic fragmentation technology
    Patent number: 9946159
    Abstract: A fragmentation pattern is formed on a surface of a warhead using a lithographic process. A photoresistant material is coated on an interior surface of the warhead casing. A portion of the photoresistant material is selectively cured by projecting an image of the fragmentation pattern onto the photoresistant material. The uncured portion of the photoresistant material is removed and an etchant is applied to the exposed portion of the warhead casing surface thereby etching the fragmentation pattern. Alternatively, a protective coating is applied over the entire surface thereby creating the fragmentation pattern.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: April 17, 2018
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Paul C. Manz, Philip J. Magnotti, Ductri H. Nguyen
  • LITHOGRAPHIC FRAGMENTATION TECHNOLOGY
    Publication number: 20170299964
    Abstract: A fragmentation pattern is formed on a surface of a warhead using a lithographic process. A photoresistant material is coated on an interior surface of the warhead casing. A portion of the photoresistant material is selectively cured by projecting an image of the fragmentation pattern onto the photoresistant material. The uncured portion of the photoresistant material is removed and an etchant is applied to the exposed portion of the warhead casing surface thereby etching the fragmentation pattern. Alternatively, a protective coating is applied over the entire surface thereby creating the fragmentation pattern.
    Type: Application
    Filed: September 30, 2016
    Publication date: October 19, 2017
    Applicant: U.S. Government as Represented by the Secretary of the Army
    Inventors: Paul C. Manz, Philip J. Magnotti, Ductri H. Nguyen