Patents by Inventor Allan P. Castillo

Allan P. Castillo 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).

  • Pitting resistant duplex stainless steel alloy
    Patent number: 4740254
    Abstract: A highly pitting resistant duplex stainless steel alloy is provided which comprises, in weight percentage, C: 0.10% and below; Si: 1.5% and below; Mn: 2.0% and below; Cr: 25.0% to 27.0%; Ni: 5.0% to 7.5%; Cu: 1.5% to 3.5%; N: 0.15% and below; Mo: 0.5% and below; and the remaining portion being substantially Fe to form the material of the highly pitting resistant duplex stainless steel alloy.
    Type: Grant
    Filed: August 29, 1986
    Date of Patent: April 26, 1988
    Assignee: Sandusky Foundry & Machine Co.
    Inventors: Charles W. Rainger, Allan P. Castillo, John C. Rogers
  • Pitting resistant duplex stainless steel alloy
    Patent number: 4612069
    Abstract: A high pitting resistant duplex stainless steel alloy is provided which comprises, in weight percentage, C: 0.08% and below; Si: 2.0% and below; Mn: 2.0% and below; Cr: 23.0% to 29.0%; Ni: 5.0% to 9.0%; Cu: 0.5% to 3.5%; N: 0.2% and below; Mo: 1.0% and below; P: 0.1% and below; S: 0.1% and below and the remaining portion being substantially Fe to form the material of the high pitting resistant duplex stainless steel alloy.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: September 16, 1986
    Assignee: Sandusky Foundry & Machine Company
    Inventors: Charles W. Rainger, Allan P. Castillo, John C. Rogers