Patents by Inventor Donald A. Gutowski

Donald A. Gutowski 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).

  • Die cast bullet manufacturing process
    Patent number: 5535495
    Abstract: The invention provides a zinc alloy die cast bullet (100) and a method for manufacturing the same for use primarily in indoor shooting ranges. The use of a zinc die cast alloy eliminates toxic lead vapors and dust which result from the use of lead in bullets. The bullet (100) is made by heating a zinc metal alloy to a molten state (30), injecting the molten alloy into a preformed cavity within a mold under a pressure (20, 60), and sizing the cast bullet at a temperature greater than 70.degree. F. (30, 70).
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: July 16, 1996
    Inventor: Donald A. Gutowski