Patents by Inventor Michael A. Dewey

Michael A. Dewey 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).

  • One pot procedure for poly (glycidyl nitrate) end modification
    Patent number: 7714078
    Abstract: A method is provided in which PGN is end-modified in a process using a single solvent. The resulting end-modified PGN may be stably crosslinked using aliphatic polyisocyanates. Further provided are methods of producing energetic compositions comprising PGN which has been end-modified in a process using a single solvent. Such energetic compositions may be stably crosslinked using aliphatic polyisocyanates.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: May 11, 2010
    Assignee: Alliant Techsystems Inc.
    Inventors: Alexander J. Paraskos, Michael A. Dewey, Wayne Edwards
  • ONE POT PROCEDURE FOR POLY (GLYCIDYL NITRATE) END MODIFICATION
    Publication number: 20080188630
    Abstract: A method is provided in which PGN is end-modified in a process using a single solvent. The resulting end-modified PGN may be stably crosslinked using aliphatic polyisocyanates. Further provided are methods of producing energetic compositions comprising PGN which has been end-modified in a process using a single solvent. Such energetic compositions may be stably crosslinked using aliphatic polyisocyanates.
    Type: Application
    Filed: October 27, 2006
    Publication date: August 7, 2008
    Inventors: Alexander J. Paraskos, Michael A. Dewey, Wayne Edwards
  • Process for making stable cured poly(glycidyl nitrate) and energetic compositions comprising same
    Patent number: 6861501
    Abstract: A process is provided in which at least one multi-functional alcohol having a hydroxyl functionality of at least two serves as a polymerization initiator. The multi-functional alcohol initiator is optionally, although preferably, reacted with a catalyst to form a catalyst-initiator complex, which is then used in the polymerization of glycidyl nitrate. The resulting poly(glycidyl nitrate) has a functionality substantially equivalent in number to the hydroxyl functionality of the multi-functional alcohol initiator. The poly(glycidyl nitrate) is cross-linked with at least one aromatic polyisocyanate having at least one aromatic ring and, on average, more than two isocyanate moieties bonded directly to the aromatic ring.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: March 1, 2005
    Assignee: Alliant Techsystems Inc.
    Inventors: Andrew J. Sanderson, Laura J. Martins, Michael A. Dewey