Patents by Inventor Ruth A. Schaefer

Ruth A. Schaefer 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).

  • Moisture-resistant black powder substitute compositions
    Patent number: 7459043
    Abstract: A solid pyrotechnic composition having a flame temperature and exhibiting ballistic performance comparable to that of black powder, but which does not contain charcoal or sulfur, is provided, as is a method for making such composition. A solid pyrotechnic composition, and method for making the same, which has a flame temperature and exhibits ballistic performance comparable to that of boron/potassium nitrate and that is preferably free of boron is also provided.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: December 2, 2008
    Assignee: Alliant Techsystems Inc.
    Inventors: Reed J. Blau, Ruth A. Schaefer, Marlin Bodily, Gary Chen
  • Additive for composition B and composition B replacements that mitigates slow cook-off violence
    Patent number: 7033449
    Abstract: An explosive composition having a main explosive and an additive, such as 2,4-dinitrophenylhydrazine. The explosive composition is resistant to slow cook-off. The main explosive includes Composition B or a Composition B replacement. The 2,4-dinitrophenylhydrazine is present in the explosive composition at less than or equal to approximately 5% by weight. An insensitive munition resistant to slow cook-off is also disclosed, as is a method of forming the explosive composition having a main explosive and 2,4-dinitrophenylhydrazine and a method of mitigating slow cook-off violence.
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: April 25, 2006
    Assignee: Alliant Techsystems Inc.
    Inventors: Ruth A. Schaefer, Robert L. Hatch, Daniel W. Doll
  • Additive for composition B and composition B replacements that mitigates slow cook-off violence
    Publication number: 20040200378
    Abstract: An explosive composition having a main explosive and an additive, such as 2,4-dinitrophenylhydrazine. The explosive composition is resistant to slow cook-off. The main explosive includes Composition B or a Composition B replacement. The 2,4-dinitrophenylhydrazine is present in the explosive composition at less than or equal to approximately 5% by weight. An insensitive munition resistant to slow cook-off is also disclosed, as is a method of forming the explosive composition having a main explosive and 2,4-dinitrophenylhydrazine and a method of mitigating slow cook-off violence.
    Type: Application
    Filed: March 10, 2003
    Publication date: October 14, 2004
    Inventors: Ruth A. Schaefer, Robert L. Hatch, Daniel W. Doll