Patents by Inventor HARISANKAR RADHAKRISHNAN

HARISANKAR RADHAKRISHNAN 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).

  • NON-MAGNESIUM PROCESS TO PRODUCE COMPACTED GRAPHITE IRON (CGI)
    Publication number: 20240093337
    Abstract: The present invention pertains to a non-magnesium process to produce Compacted Graphite Iron (CGI) by placing a treatment alloy into a treatment ladle, and then placing an inoculant over the treatment alloy in the treatment ladle and pouring a molten base metal there over. The treatment alloy comprises iron, silicon and lanthanum, wherein lanthanum is 3-30% by weight of the treatment alloy, silicon is 40-50% by weight of the treatment alloy, and the remaining is Iron. Lanthanum in the treatment alloy makes the graphite precipitate as vermiculite (compacted form) instead of flake or spheroids. With extended process window offered by this new process (0.03-0.1% residual lanthanum in the metal) required to make CGI, this new process removes the stringent process control (0.01-0.02% residual magnesium in the metal) dictated by the magnesium process of making CGI.
    Type: Application
    Filed: November 20, 2023
    Publication date: March 21, 2024
    Inventors: Srikanth Sivaraman, Gowri Subhramanyam, Nadimuthu SRINIVASAN, HARISANKAR RADHAKRISHNAN
  • Non-magnesium process to produce compacted graphite iron (CGI)
    Patent number: 11859270
    Abstract: The present invention pertains to a non-magnesium process to produce Compacted Graphite Iron (CGI) by placing a treatment alloy into a treatment ladle, and then placing an inoculant over the treatment alloy in the treatment ladle and pouring a molten base metal there over. The treatment alloy comprises iron, silicon and lanthanum, wherein lanthanum is 3-30% by weight of the treatment alloy, silicon is 40-50% by weight of the treatment alloy, and the remaining is Iron. Lanthanum in the treatment alloy makes the graphite precipitate as vermiculite (compacted form) instead of flake or spheroids. With extended process window offered by this new process (0.03-0.1% residual lanthanum in the metal) required to make CGI, this new process removes the stringent process control (0.01-0.02% residual magnesium in the metal) dictated by the magnesium process of making CGI.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: January 2, 2024
    Assignee: SNAM ALLOYS PVT LTD
    Inventors: Srikanth Sivaraman, Gowri Subhramanyam, Nadimuthu Srinivasan, Harisankar Radhakrishnan
  • A Non-Magnesium process to produce Compacted Graphite Iron (CGI)
    Publication number: 20210087658
    Abstract: The present invention pertains to a non-magnesium process to produce Compacted Graphite Iron (CGI) by placing a treatment alloy into a treatment ladle, and then placing an inoculant over die treatment alloy in the treatment ladle and pouring a molten base metal there over. The treatment alloy comprises iron, silicon and, lanthanum, wherein lanthanum is 3-30% by weight of the treatment alloy, silicon is 40-50% by weight of the treatment alloy, and the remaining is Iron. Lanthanum in the treatment alloy makes the graphite precipitate as vermiculite (compacted form) instead of flake or spheroids. With extended process window offered by this new process (0.03-0.1% residual lanthanum in the metal) required to make CGI, this new process removes the stringent process control (0.01-0.02% residual magnesium in the metal) dictated by the magnesium process of making CGI.
    Type: Application
    Filed: September 12, 2017
    Publication date: March 25, 2021
    Inventors: Srikanth Sivaraman, Gowri Subhramanyam, Nadimuthu SPINIVASAN, HARISANKAR RADHAKRISHNAN