Patents by Inventor Lawrence James Engel

Lawrence James Engel 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).

  • Process for the preparation of aminated polymers useful as additives for fuels and lubricants
    Patent number: 4032700
    Abstract: Preparation of aminated polymeric additives useful as oil additives, for example as dispersants for hydrocarbon fuels and lubricants, and as multifunctional dispersant-viscosity index improvers for lubricants, by the reaction of amine with a halogen containing copolymer of ethylene, a C.sub.3 to C.sub.18 straight or branched chain .alpha.-olefin and a C.sub.5 to C.sub.14 acyclic or alicyclic nonconjugated diolefin, said halogen containing copolymer being prepared by the halogenation of said copolymer.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: June 28, 1977
    Assignee: Exxon Research and Engineering Company
    Inventors: Won R. Song, John Brooke Gardiner, Lawrence James Engel