Patents by Inventor Jeff F. Widener

Jeff F. Widener 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).

  • Chain-extended poly(bis-azidomethyloxetane), and combustible cartridge cases and ammunition comprising the same
    Patent number: 6600002
    Abstract: A combustible cartridge case is provided that includes at least one energetic thermoplastic homopolymer or copolymer derived from, at least in part, poly(bis-azidomethyloxetane) prepolymer blocks terminated with isocyanate-reactive groups, such as hydroxyl groups. Chain linking of the prepolymer blocks is performed with diisocyanates for end-capping the prepolymer blocks, and a difunctional linking compound for linking the end-capped prepolymer blocks. The energetic thermoplastic is preferably capable of being pressed, extruded, rotational molded, injection loaded, or otherwise shaped into a desired configuration. Also provided is a chain-extended poly(bis-azidomethyloxetane) homopolymer derived from bis-azidomethyloxetane prepolymer blocks, which are terminated with isocyanate-reactive groups and chain extended with at least one diisocyanate end-capping compound and at least one difunctional linking compound.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: July 29, 2003
    Assignee: Alliant Techsystems, Inc.
    Inventors: Andrew J. Sanderson, William W. Edwards, Paul C. Braithwaite, Jeffrey D. Akester, Jeff F. Widener
  • Chain-extended poly(bis-azidomethyloxetane), and combustible cartridge cases and ammunition comprising the same
    Publication number: 20010047072
    Abstract: A combustible cartridge case is provided that includes at least one energetic thermoplastic homopolymer or copolymer derived from, at least in part, poly(bis-azidomethyloxetane) prepolymer blocks terminated with isocyanate-reactive groups, such as hydroxyl groups. Chain linking of the prepolymer blocks is performed with diisocyanates for end-capping the prepolymer blocks, and a difunctional linking compound for linking the end-capped prepolymer blocks. The energetic thermoplastic is preferably capable of being pressed, extruded, rotational molded, injection loaded, or otherwise shaped into a desired configuration. Also provided is a chain-extended poly(bis-azidomethyloxetane) homopolymer derived from bis-azidomethyloxetane prepolymer blocks, which are terminated with isocyanate-reactive groups and chain extended with at least one diisocyanate end-capping compound and at least one difunctional linking compound.
    Type: Application
    Filed: April 24, 2001
    Publication date: November 29, 2001
    Inventors: Andrew J. Sanderson, William W. Edwards, Paul C. Braithwaite, Jeffrey D. Akester, Jeff F. Widener