Patents by Inventor Sergei Stepanovich Kovalev

Sergei Stepanovich Kovalev 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).

  • Method for graphene oxide synthesis
    Patent number: 10781105
    Abstract: The invention relates to the field of carbon structure production and, in particular, to a method for synthesis of graphene oxide which is widely used in electronics, medicine, pharmacology and construction industries. Provided is a method for synthesis of graphene oxide that includes oxidizing ground graphite with sulfuric acid and at least one oxidizer in a medium of supercritical fluid, wherein the method includes providing a mixture of sulfuric acid and dry ice in an amount sufficient for the mixture to solidify, and a mixture of at least one oxidizer and dry ice, wherein at least one of said mixtures contains ground graphite; introducing the provided mixtures into a high pressure autoclave; and further mixing the reagents. Thus, the claimed invention is a method for synthesis of graphene oxide that allows achieving the technical result consisting in safe production of high quality graphene oxide, wherein the time cost is relatively low and the consumption of sulfuric acid is significantly reduced.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: September 22, 2020
    Inventors: Mikhail Aleksandrovich Arkhipov, Mukhamed Magomedovich Arsanukaev, Sergei Stepanovich Kovalev, Vladimir Fedorovich Shitsle
  • METHOD FOR GRAPHENE OXIDE SYNTHESIS
    Publication number: 20200024143
    Abstract: The invention relates to the field of carbon structure production and, in particular, to a method for synthesis of graphene oxide which is widely used in electronics, medicine, pharmacology and construction industries. Provided is a method for synthesis of graphene oxide that includes oxidizing ground graphite with sulfuric acid and at least one oxidizer in a medium of supercritical fluid, wherein the method includes providing a mixture of sulfuric acid and dry ice in an amount sufficient for the mixture to solidify, and a mixture of at least one oxidizer and dry ice, wherein at least one of said mixtures contains ground graphite; introducing the provided mixtures into a high pressure autoclave; and further mixing the reagents. Thus, the claimed invention is a method for synthesis of graphene oxide that allows achieving the technical result consisting in safe production of high quality graphene oxide, wherein the time cost is relatively low and the consumption of sulfuric acid is significantly reduced.
    Type: Application
    Filed: September 7, 2018
    Publication date: January 23, 2020
    Inventors: Mikhail Aleksandrovich Arkhipov, Mukhamed Magomedovich Arsanukaev, Sergei Stepanovich Kovalev, Vladmir Fedorovich Shitsle