Patents by Inventor Fred J. Einberg

Fred J. Einberg 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).

  • Adhesive tetrazole polymers and process of making therefor
    Patent number: 4013596
    Abstract: New tetrazole polymers are formed from a self-polymerization condensation action effected by adding tetrazoles of the formula below to a solution containing an equivalent of base or slightly less than an equivalent and heating for about 5 days at temperatures of 50.degree.-100.degree. C: ##STR1## where Z is CH.sub.2 CH.sub.2 X or NHCOCH.sub.2, and where X is Br, Cl, or I. The polytetrazoles serve as binders in propellant systems and also supply added energy thereto.
    Type: Grant
    Filed: March 7, 1975
    Date of Patent: March 22, 1977
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Fred J. Einberg