Patents by Inventor Sumita Majumdar

Sumita Majumdar 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).

  • Process for making iron-based casting alloy
    Patent number: 6800152
    Abstract: A process for making an iron-based casting alloy is performed by combining an iron-carbon-chromium system with primary carbides of vanadium, niobium, titanium, or combinations thereof without eutectic carbides of vanadium, niobium and titanium. Eutectic chromium carbides (M7C3) are also formed without primary chromium carbides. Proeutectic austenite can also be formed in the alloy.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: October 5, 2004
    Assignee: Climax Research Services, Inc.
    Inventors: Richard B. Gundlach, Sumita Majumdar
  • Process for making iron-based casting allow
    Publication number: 20040025988
    Abstract: An iron-based casting alloy and a process for making the alloy are provided by combining an iron-carbon-chromium system with primary carbides of vanadium, niobium, titanium, or combinations thereof without any eutectic carbides of vanadium, niobium and titanium. Eutectic chromium carbides (M7C3) are also formed without any primary chromium carbides. Proeutectic austenite can also be formed in the alloy.
    Type: Application
    Filed: August 6, 2003
    Publication date: February 12, 2004
    Applicant: Climax Research Services, Inc.
    Inventors: Richard B. Gundlach, Sumita Majumdar
  • Iron-based casting alloy
    Patent number: 6669790
    Abstract: An iron-based casting alloy and a process for making the alloy are provided by combining an iron-carbon-chromium system with primary carbides of vanadium, niobium, titanium, or combinations thereof without any eutectic carbides of vanadium, niobium and titanium. Eutectic chromium carbides (M7C3) are also formed without any primary chromium carbides. Proeutectic austenite can also be formed in the alloy.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: December 30, 2003
    Assignee: Climax Research Services, Inc.
    Inventors: Richard B. Gundlach, Sumita Majumdar