Patents by Inventor John F. Leahy

John F. Leahy 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: 6641683
    Abstract: A melt-castable explosive composition not based on TNT consisting essentially of about 10 to 20 weight percent of a matrix material having a melting temperature of about 80° to 100° C., about 1 to 5 weight percent of a plasticizer, up to about 20 weight percent of a metal powder, up to about 20 weight percent of an oxidizer and about 70 to 89 weight percent of a high explosive. The matrix material is carnauba wax modified with ozokerite wax in a weight ratio of about 1:1 to 20:1.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: November 4, 2003
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Robert L. McKenney, Jr., John F. Leahy, Spencer T. Parkin, Thomas R. Krawietz
  • Patent number: 4978482
    Abstract: A method of melt casting plastic bonded explosives by:A. forming a uniform binder mixture of the following ingredients(1) from 10 to 30 weight percent of a triblock polymer of the formula A-B-A wherein A represents a polystyrene block and B represents an elastomeric midblock which is selected from the group consisting of polybutadiene, polyisoprene, and polyethylenebutylene; and(2) from 70 to 90 weight percent of a low viscosity oil selected from the group consisting of naphthenic, paraffinic, and olefinic oilsby mixing the ingredients under low-shear conditions at a temperature of from 80.degree. C. to 110.degree. C.;B. mixing an energetic filler into the binder mixture under low shear conditions and at a temperature of from 80.degree. C. to 110.degree. C., provided that the viscosity of the mixture does not exceed 20 kilopoise;C. pouring the energetic filler-binder mixture formed in step B into a mold; andD. cooling energetic filler-binder mixture to form a solid explosive composite.
    Type: Grant
    Filed: October 29, 1984
    Date of Patent: December 18, 1990
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Nancy C. Johnson, Robert C. Gill, John F. Leahy, Carl Gotzmer, Jr., Harold T. Fillman