Patents by Inventor Robert D. Lungberg

Robert D. Lungberg 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).

  • Ethylene alpha-olefin polymer substituted mono-and dicarboxylic acid lubricant dispersant additives
    Patent number: 5277833
    Abstract: The present invention is directed to an oil-soluble lubricating oil additive comprising at least one terminally unsaturated ethylene alpha-olefin polymer of 300 to 10,000 number average molecular weight substituted with mono- or dicarboxylic acid producing moieties (preferably dicarboxylic acid or anhydride moieties), wherein the terminal unsaturation comprises terminal ethenylidene unsaturation. The mono- and dicarboxylic acid or anhydride substituted polymers of this invention are useful per se as additives to lubricating oils, and can also be reacted with a nucleophilic reagent, such as amines, alcohols, amino alcohols and reactive metal compounds, to form products which are also useful lubricating oil additives, e.g., as dispersants.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: January 11, 1994
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Won R. Song, Albert Rossi, Howard W. Turner, Howard C. Welborn, Robert D. Lungberg, Antonio Gutierrez, Robert A. Kleist