Patents by Inventor Hema Ramsurn

Hema Ramsurn 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).

  • DENSE AND SELF-HEALING ZrB2-SiC ANTI-OXIDATIVE MULTILAYER COATINGS FOR CARBON/CARBON COMPOSITES
    Publication number: 20250197302
    Abstract: Disclosed are methods for preparing a carbon/carbon composite having protective layers suitable for precluding oxidative weight loss and self-healing carbon/carbon composites prepared according to the disclosed methods.
    Type: Application
    Filed: October 14, 2024
    Publication date: June 19, 2025
    Inventors: Jose C. Cordeiro, JR., Hema Ramsurn, Michael W. Keller
  • Vacuum-free, hydrogen-free catalytic synthesis of graphene from solid hydrocarbons
    Patent number: 11760636
    Abstract: Disclosed is a process for producing graphene from solid hydrocarbons including biomass and coal. The disclosed method does not require the presence of hydrogen and does not operate under a vacuum. The method begins by converting biomass to a graphene precursor while coal is used as is. Subsequently, the method grinds the graphene precursor to provide a desired particle size. The particles of graphene precursor (biocoal or coal) are converted to graphene by catalytic conversion on metallic foil under atmospheric conditions and in the absence of hydrogen.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: September 19, 2023
    Assignee: The University of Tulsa
    Inventors: Hema Ramsurn, Rahul Kundu
  • VACUUM-FREE, HYDROGEN-FREE CATALYTIC SYNTHESIS OF GRAPHENE FROM SOLID HYDROCARBONS
    Publication number: 20210309523
    Abstract: Disclosed is a process for producing graphene from solid hydrocarbons including biomass and coal. The disclosed method does not require the presence of hydrogen and does not operate under a vacuum. The method begins by converting biomass to a graphene precursor while coal is used as is. Subsequently, the method grinds the graphene precursor to provide a desired particle size. The particles of graphene precursor (biocoal or coal) are converted to graphene by catalytic conversion on metallic foil under atmospheric conditions and in the absence of hydrogen.
    Type: Application
    Filed: October 24, 2019
    Publication date: October 7, 2021
    Inventors: Hema Ramsurn, Rahul Kundu