Patents by Inventor Donald A. Levins

Donald A. Levins 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).

  • 1,3,5,5-Tetranitrohexahydropyrimidine (DNNC)
    Patent number: 4346222
    Abstract: 1,3,5,5-Tetranitrohexahydropyrimidine, termed DNNC for convenience, useful as an oxident in explosive and rocket propellant compositions.
    Type: Grant
    Filed: December 4, 1980
    Date of Patent: August 24, 1982
    Assignee: SRI International
    Inventors: Donald A. Levins, Clifford D. Bedford, Clifford L. Coon