Patents by Inventor James V. DeFrancesco

James V. DeFrancesco 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).

  • Multifunctional ashless dispersants
    Patent number: 5266081
    Abstract: A fuel additive is the reaction product of an intermediate reaction product of a hydrocarbon-substituted succinic anhydride and an aminosalicylic acid, preferably a 4-aminosalicylic acid. The intermediate is reacted with an aldehyde, preferably formaldehyde and an alkylenepolyamine preferably tetraethylenepentamine. The reaction product is post reacted with a hydrocarbon-substituted succinic anhydride which can be the same or different as the hydrocarbon-substituted succinic anhydride of the intermediate. The additive has dispersant and detergent properties and is effective in liquid hydrocarbon or liquid oxygenated fuels or mixtures of the said fuels.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: November 30, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Noyes L. Avery, Angeline B. Cardis, James V. DeFrancesco, Virginia C. Wiszniewski