Patents by Inventor Stephen B. Ehlers

Stephen B. Ehlers 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).

  • Combustible ammunition cartridge case
    Patent number: 5138949
    Abstract: An ammunition cartridge is disclosed comprising a projectile threadably attached to a combustible case body via a threaded combustible case adapter. At least one of the adapter end have an uniform density of polyurethane resin to provide strength and sufficient support for the threads. The combustible case body may also have an uniform resin density to support threads corresponding to those on the rear end of the adapter. The preferable uniform polyurethane density is about 0.75 grams per cubic centimeter.
    Type: Grant
    Filed: September 20, 1990
    Date of Patent: August 18, 1992
    Assignee: Olin Corporation
    Inventors: Terry L. Swartout, Stephen B. Ehlers, David R. Field, Terence Connolly