Patents by Inventor James A. Hartwell

James A. Hartwell 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).

  • Patent number: 4889571
    Abstract: A propellant formulation includes energetic particulate solids dispersed in a binder system of high molecular weight 1,2 syndiotactic butadiene and a plasticizer. The propellant is prepared by mixing above the melting temperature of the butadiene and without the use of solvents. The propellant is castable without curing.
    Type: Grant
    Filed: September 2, 1986
    Date of Patent: December 26, 1989
    Assignee: Morton Thiokol, Inc.
    Inventors: Rodney L. Willer, James A. Hartwell, Robert G. Gleeson