Patents by Inventor Michael DeCrescente

Michael DeCrescente 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 removing sulfur from superalloy articles to improve their oxidation resistance
    Patent number: 5346563
    Abstract: Superalloy articles are made more oxidation resistant by a process which includes heat treating the article in the presence of foreign chemical species, at a temperature at which the foreign chemical species reacts with and modifies any oxide film present on the article surface. The heat treatment is best carried out at a temperature above the gamma prime solvus temperature of the article and below the incipient melting temperature of the article. Alternatively, the heat treatment may be carried out within the range defined by the incipient melting temperature of the article and about 150.degree. C. below the incipient melting temperature of the article. At such temperatures the foreign chemical species reacts with and modifies the oxide film on the article surface. Sulfur is then able to diffuse through such modified film, and a more oxidation resistant component is produced.
    Type: Grant
    Filed: April 14, 1993
    Date of Patent: September 13, 1994
    Assignee: United Technologies Corporation
    Inventors: William P. Allen, Norman S. Bornstein, Stephen Chin, Michael DeCrescente, David N. Duhl, Donald R. Parille, Roscoe A. Pike, John G. Smeggil