Patents by Inventor Andrew Terpay

Andrew Terpay 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 of making an apertured casting
    Patent number: 3957104
    Abstract: An apertured casting is made by first forming a duplicate in the shape of the finished casting, positioning refractory metal bodies such as wires in the duplicate at points corresponding to apertures or passageways in finished products, forming a ceramic coating on the duplicate, removing the duplicate material, firing the ceramic in a vacuum or inert atmosphere, vacuum casting the metal in the ceramic form, removing the ceramic form, heating the cast object in an atmospheric furnace to oxidize the refractory metal bodies and then leaching the oxidized refractory bodies from the casting with a molten caustic agent or acid solution.
    Type: Grant
    Filed: February 27, 1974
    Date of Patent: May 18, 1976
    Assignee: The United States of America as represented by the Administrator of the United States National Aeronautics and Space Administration
    Inventor: Andrew Terpay