Patents by Inventor Edward J. Schreck

Edward J. Schreck 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).

  • Method for making coated ultra-fine ammonium perchlorate particles and product produced thereby
    Patent number: 3954526
    Abstract: Sub-micron particle size ammonium perchlorate particles are made by mixing a solution of ammonium perchlorate in a volatile liquid with a second less volatile liquid which is miscible with the first liquid and is a non-solvent for ammonium perchlorate. The resulting mixture is heated to vaporize the volatile liquid and form a suspension of fine ammonium perchlorate particles in the second liquid. A particle coating agent soluble in the second liquid is used to limit particle growth. The particles are coated with the coating agent and may be recovered from the suspension by vaporization of the second liquid to form a powder, or by partial evaporization of the second liquid to form a concentrated slurry or paste in which the ammonium perchlorate is the disperse phase. The ultra-fine particles formed are suitable for use in propellant formulations.
    Type: Grant
    Filed: February 22, 1971
    Date of Patent: May 4, 1976
    Assignee: Thiokol Corporation
    Inventors: Grafton F. Mangum, Rudy E. Rogers, Edward J. Schreck