Patents by Inventor Nicholas J. Sheetz

Nicholas J. Sheetz 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).

  • Etchant for aluminum containing surfaces and method
    Patent number: 4888090
    Abstract: A stable aqueous etchant for aluminum containing surfaces and method of etching such surfaces.
    Type: Grant
    Filed: December 10, 1986
    Date of Patent: December 19, 1989
    Assignee: Pennwalt Corporation
    Inventor: Nicholas J. Sheetz