Patents by Inventor Aleksandr I. Levin

Aleksandr I. Levin 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).

  • Improved process for the production of an additive for lubricating oils and related product
    Patent number: 4212752
    Abstract: A detergent additive for lubricating oils is prepared by reacting an alkyenolsulfide with an oxide or hydroxide of a earth-alkali metal and carbonating the reaction product with carbon dioxide, the reaction being carried out in the presence of a promoter, selected in the class of the organic nitrogen compounds, and possibly of a co-promoter; the temperature and the time of the reaction are depending on whether the co-promoter is present. The resulting product shows improved detergency and flow-ability properties.
    Type: Grant
    Filed: March 6, 1978
    Date of Patent: July 15, 1980
    Assignees: Liquichimica Robassomero S.p.A., Vsesoiuznis Nauchij Issledovatelskj Institut Po Pererabotke Nefti Vniinp
    Inventors: Andrea Peditto, Franco Fossati, Vincenzo Petrillo, Paolo Peri, Ielena A. Ivanova, Aleksandr I. Levin, Aleksandr A. Fufaiev, Vicktor M. Shkolnikov