Patents by Inventor Leonid A. Kashevarov

Leonid A. Kashevarov 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 removal of hydrogen sulfide from gases
    Patent number: 5616306
    Abstract: A process is provided for the removal of hydrogen sulfide from a hydrogen sulfide-containing gas by contacting said gas with an aqueous solution comprising chelated iron, an organic amine, an alkali metal hydroxide, carbonate or bicarbonate, and an alkali metal or ammonium phosphate or polyphosphate.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: April 1, 1997
    Assignee: Chevron U.S.A. Inc.
    Inventors: Akhmet M. Mazgarov, Akhmatfail M. Fakhriev, Rais N. Khafizov, Leonid A. Kashevarov, Mikhail P. Alimov