Patents by Inventor Joseph J. Demo, Jr.

Joseph J. Demo, Jr. 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).

  • Ductile chromium-containing ferritic alloys
    Patent number: 4282291
    Abstract: The present invention relates to high chromium ferritic stainless steels having improved corrosion resistance and weldability.
    Type: Grant
    Filed: July 14, 1977
    Date of Patent: August 4, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Joseph J. Demo, Jr.
  • Ductile chromium-containing ferritic alloys
    Patent number: 3992198
    Abstract: Ferritic iron-chromium alloys containing 19-35 wt. per cent chromium inhibited against the embritling effects of C+N up to a combined total of about 0.28 weight per cent by inclusion of Ti together with A1.
    Type: Grant
    Filed: May 7, 1975
    Date of Patent: November 16, 1976
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: Joseph J. Demo, Jr.
  • Fe, Cr ferritic alloys containing Al and Nb
    Patent number: 3963532
    Abstract: Ferritic iron-chromium alloys containing 25-28 wt. per cent chromium inhibited against the embrittling effects of C+N up to a combined total of about 0.18 weight per cent by inclusion of Nb together with Al.
    Type: Grant
    Filed: May 30, 1974
    Date of Patent: June 15, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Joseph J. Demo, Jr.