Patents by Inventor Marian F. Leong

Marian F. Leong 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 producing ORI control additives
    Patent number: 5147414
    Abstract: An improvement in a method of producing an ORI control additive which is the reaction product of a polybutenyl succinic anhydride and a polyoxyalkylene diamine, wherein the improvement comprises reacting solvent free the anhydride and diamine at an increased temperature and monitoring the absorbancy of the reaction product to determine the degree of reaction completion.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: September 15, 1992
    Assignee: Texaco Inc.
    Inventors: William J. Powers, III, Leonard A. Matthews, Marian F. Leong, Robert W. Erickson, Jr.